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From voze...@apache.org
Subject [34/57] [abbrv] incubator-ignite git commit: # IGNITE-226: WIP (8)
Date Fri, 13 Feb 2015 10:54:44 GMT
http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopInputStream.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopInputStream.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopInputStream.java
new file mode 100644
index 0000000..c26a5ab
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopInputStream.java
@@ -0,0 +1,626 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+import org.apache.commons.logging.*;
+import org.apache.hadoop.fs.*;
+import org.apache.ignite.*;
+import org.apache.ignite.internal.fs.common.*;
+import org.apache.ignite.internal.util.lang.*;
+import org.apache.ignite.internal.util.typedef.internal.*;
+import org.jetbrains.annotations.*;
+
+import java.io.*;
+
+/**
+ * GGFS input stream wrapper for hadoop interfaces.
+ */
+@SuppressWarnings("FieldAccessedSynchronizedAndUnsynchronized")
+public final class IgfsHadoopInputStream extends InputStream implements Seekable, PositionedReadable,
+    IgfsHadoopStreamEventListener {
+    /** Minimum buffer size. */
+    private static final int MIN_BUF_SIZE = 4 * 1024;
+
+    /** Server stream delegate. */
+    private IgfsHadoopStreamDelegate delegate;
+
+    /** Stream ID used by logger. */
+    private long logStreamId;
+
+    /** Stream position. */
+    private long pos;
+
+    /** Stream read limit. */
+    private long limit;
+
+    /** Mark position. */
+    private long markPos = -1;
+
+    /** Prefetch buffer. */
+    private DoubleFetchBuffer buf = new DoubleFetchBuffer();
+
+    /** Buffer half size for double-buffering. */
+    private int bufHalfSize;
+
+    /** Closed flag. */
+    private volatile boolean closed;
+
+    /** Flag set if stream was closed due to connection breakage. */
+    private boolean connBroken;
+
+    /** Logger. */
+    private Log log;
+
+    /** Client logger. */
+    private IgfsLogger clientLog;
+
+    /** Read time. */
+    private long readTime;
+
+    /** User time. */
+    private long userTime;
+
+    /** Last timestamp. */
+    private long lastTs;
+
+    /** Amount of read bytes. */
+    private long total;
+
+    /**
+     * Creates input stream.
+     *
+     * @param delegate Server stream delegate.
+     * @param limit Read limit.
+     * @param bufSize Buffer size.
+     * @param log Log.
+     * @param clientLog Client logger.
+     */
+    public IgfsHadoopInputStream(IgfsHadoopStreamDelegate delegate, long limit, int bufSize, Log log,
+        IgfsLogger clientLog, long logStreamId) {
+        assert limit >= 0;
+
+        this.delegate = delegate;
+        this.limit = limit;
+        this.log = log;
+        this.clientLog = clientLog;
+        this.logStreamId = logStreamId;
+
+        bufHalfSize = Math.max(bufSize, MIN_BUF_SIZE);
+
+        lastTs = System.nanoTime();
+
+        delegate.hadoop().addEventListener(delegate, this);
+    }
+
+    /**
+     * Read start.
+     */
+    private void readStart() {
+        long now = System.nanoTime();
+
+        userTime += now - lastTs;
+
+        lastTs = now;
+    }
+
+    /**
+     * Read end.
+     */
+    private void readEnd() {
+        long now = System.nanoTime();
+
+        readTime += now - lastTs;
+
+        lastTs = now;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized int read() throws IOException {
+        checkClosed();
+
+        readStart();
+
+        try {
+            if (eof())
+                return -1;
+
+            buf.refreshAhead(pos);
+
+            int res = buf.atPosition(pos);
+
+            pos++;
+            total++;
+
+            buf.refreshAhead(pos);
+
+            return res;
+        }
+        catch (IgniteCheckedException e) {
+            throw IgfsHadoopUtils.cast(e);
+        }
+        finally {
+            readEnd();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized int read(@NotNull byte[] b, int off, int len) throws IOException {
+        checkClosed();
+
+        if (eof())
+            return -1;
+
+        readStart();
+
+        try {
+            long remaining = limit - pos;
+
+            int read = buf.flatten(b, pos, off, len);
+
+            pos += read;
+            total += read;
+            remaining -= read;
+
+            if (remaining > 0 && read != len) {
+                int readAmt = (int)Math.min(remaining, len - read);
+
+                delegate.hadoop().readData(delegate, pos, readAmt, b, off + read, len - read).get();
+
+                read += readAmt;
+                pos += readAmt;
+                total += readAmt;
+            }
+
+            buf.refreshAhead(pos);
+
+            return read;
+        }
+        catch (IgniteCheckedException e) {
+            throw IgfsHadoopUtils.cast(e);
+        }
+        finally {
+            readEnd();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized long skip(long n) throws IOException {
+        checkClosed();
+
+        if (clientLog.isLogEnabled())
+            clientLog.logSkip(logStreamId, n);
+
+        long oldPos = pos;
+
+        if (pos + n <= limit)
+            pos += n;
+        else
+            pos = limit;
+
+        buf.refreshAhead(pos);
+
+        return pos - oldPos;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized int available() throws IOException {
+        checkClosed();
+
+        int available = buf.available(pos);
+
+        assert available >= 0;
+
+        return available;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void close() throws IOException {
+        if (!closed) {
+            readStart();
+
+            if (log.isDebugEnabled())
+                log.debug("Closing input stream: " + delegate);
+
+            delegate.hadoop().closeStream(delegate);
+
+            readEnd();
+
+            if (clientLog.isLogEnabled())
+                clientLog.logCloseIn(logStreamId, userTime, readTime, total);
+
+            markClosed(false);
+
+            if (log.isDebugEnabled())
+                log.debug("Closed stream [delegate=" + delegate + ", readTime=" + readTime +
+                    ", userTime=" + userTime + ']');
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void mark(int readLimit) {
+        markPos = pos;
+
+        if (clientLog.isLogEnabled())
+            clientLog.logMark(logStreamId, readLimit);
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void reset() throws IOException {
+        checkClosed();
+
+        if (clientLog.isLogEnabled())
+            clientLog.logReset(logStreamId);
+
+        if (markPos == -1)
+            throw new IOException("Stream was not marked.");
+
+        pos = markPos;
+
+        buf.refreshAhead(pos);
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean markSupported() {
+        return true;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized int read(long position, byte[] buf, int off, int len) throws IOException {
+        long remaining = limit - position;
+
+        int read = (int)Math.min(len, remaining);
+
+        // Return -1 at EOF.
+        if (read == 0)
+            return -1;
+
+        readFully(position, buf, off, read);
+
+        return read;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void readFully(long position, byte[] buf, int off, int len) throws IOException {
+        long remaining = limit - position;
+
+        checkClosed();
+
+        if (len > remaining)
+            throw new EOFException("End of stream reached before data was fully read.");
+
+        readStart();
+
+        try {
+            int read = this.buf.flatten(buf, position, off, len);
+
+            total += read;
+
+            if (read != len) {
+                int readAmt = len - read;
+
+                delegate.hadoop().readData(delegate, position + read, readAmt, buf, off + read, readAmt).get();
+
+                total += readAmt;
+            }
+
+            if (clientLog.isLogEnabled())
+                clientLog.logRandomRead(logStreamId, position, len);
+        }
+        catch (IgniteCheckedException e) {
+            throw IgfsHadoopUtils.cast(e);
+        }
+        finally {
+            readEnd();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void readFully(long position, byte[] buf) throws IOException {
+        readFully(position, buf, 0, buf.length);
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void seek(long pos) throws IOException {
+        A.ensure(pos >= 0, "position must be non-negative");
+
+        checkClosed();
+
+        if (clientLog.isLogEnabled())
+            clientLog.logSeek(logStreamId, pos);
+
+        if (pos > limit)
+            pos = limit;
+
+        if (log.isDebugEnabled())
+            log.debug("Seek to position [delegate=" + delegate + ", pos=" + pos + ", oldPos=" + this.pos + ']');
+
+        this.pos = pos;
+
+        buf.refreshAhead(pos);
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized long getPos() {
+        return pos;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized boolean seekToNewSource(long targetPos) {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void onClose() {
+        markClosed(true);
+    }
+
+    /** {@inheritDoc} */
+    @Override public void onError(String errMsg) {
+        // No-op.
+    }
+
+    /**
+     * Marks stream as closed.
+     *
+     * @param connBroken {@code True} if connection with server was lost.
+     */
+    private void markClosed(boolean connBroken) {
+        // It is ok to have race here.
+        if (!closed) {
+            closed = true;
+
+            this.connBroken = connBroken;
+
+            delegate.hadoop().removeEventListener(delegate);
+        }
+    }
+
+    /**
+     * @throws IOException If check failed.
+     */
+    private void checkClosed() throws IOException {
+        if (closed) {
+            if (connBroken)
+                throw new IOException("Server connection was lost.");
+            else
+                throw new IOException("Stream is closed.");
+        }
+    }
+
+    /**
+     * @return {@code True} if end of stream reached.
+     */
+    private boolean eof() {
+        return limit == pos;
+    }
+
+    /**
+     * Asynchronous prefetch buffer.
+     */
+    private static class FetchBufferPart {
+        /** Read future. */
+        private GridPlainFuture<byte[]> readFut;
+
+        /** Position of cached chunk in file. */
+        private long pos;
+
+        /** Prefetch length. Need to store as read future result might be not available yet. */
+        private int len;
+
+        /**
+         * Creates fetch buffer part.
+         *
+         * @param readFut Read future for this buffer.
+         * @param pos Read position.
+         * @param len Chunk length.
+         */
+        private FetchBufferPart(GridPlainFuture<byte[]> readFut, long pos, int len) {
+            this.readFut = readFut;
+            this.pos = pos;
+            this.len = len;
+        }
+
+        /**
+         * Copies cached data if specified position matches cached region.
+         *
+         * @param dst Destination buffer.
+         * @param pos Read position in file.
+         * @param dstOff Offset in destination buffer from which start writing.
+         * @param len Maximum number of bytes to copy.
+         * @return Number of bytes copied.
+         * @throws IgniteCheckedException If read future failed.
+         */
+        public int flatten(byte[] dst, long pos, int dstOff, int len) throws IgniteCheckedException {
+            // If read start position is within cached boundaries.
+            if (contains(pos)) {
+                byte[] data = readFut.get();
+
+                int srcPos = (int)(pos - this.pos);
+                int cpLen = Math.min(len, data.length - srcPos);
+
+                U.arrayCopy(data, srcPos, dst, dstOff, cpLen);
+
+                return cpLen;
+            }
+
+            return 0;
+        }
+
+        /**
+         * @return {@code True} if data is ready to be read.
+         */
+        public boolean ready() {
+            return readFut.isDone();
+        }
+
+        /**
+         * Checks if current buffer part contains given position.
+         *
+         * @param pos Position to check.
+         * @return {@code True} if position matches buffer region.
+         */
+        public boolean contains(long pos) {
+            return this.pos <= pos && this.pos + len > pos;
+        }
+    }
+
+    private class DoubleFetchBuffer {
+        /**  */
+        private FetchBufferPart first;
+
+        /** */
+        private FetchBufferPart second;
+
+        /**
+         * Copies fetched data from both buffers to destination array if cached region matched read position.
+         *
+         * @param dst Destination buffer.
+         * @param pos Read position in file.
+         * @param dstOff Destination buffer offset.
+         * @param len Maximum number of bytes to copy.
+         * @return Number of bytes copied.
+         * @throws IgniteCheckedException If any read operation failed.
+         */
+        public int flatten(byte[] dst, long pos, int dstOff, int len) throws IgniteCheckedException {
+            assert dstOff >= 0;
+            assert dstOff + len <= dst.length : "Invalid indices [dst.length=" + dst.length + ", dstOff=" + dstOff +
+                ", len=" + len + ']';
+
+            int bytesCopied = 0;
+
+            if (first != null) {
+                bytesCopied += first.flatten(dst, pos, dstOff, len);
+
+                if (bytesCopied != len && second != null) {
+                    assert second.pos == first.pos + first.len;
+
+                    bytesCopied += second.flatten(dst, pos + bytesCopied, dstOff + bytesCopied, len - bytesCopied);
+                }
+            }
+
+            return bytesCopied;
+        }
+
+        /**
+         * Gets byte at specified position in buffer.
+         *
+         * @param pos Stream position.
+         * @return Read byte.
+         * @throws IgniteCheckedException If read failed.
+         */
+        public int atPosition(long pos) throws IgniteCheckedException {
+            // Should not reach here if stream contains no data.
+            assert first != null;
+
+            if (first.contains(pos)) {
+                byte[] bytes = first.readFut.get();
+
+                return bytes[((int)(pos - first.pos))] & 0xFF;
+            }
+            else {
+                assert second != null;
+                assert second.contains(pos);
+
+                byte[] bytes = second.readFut.get();
+
+                return bytes[((int)(pos - second.pos))] & 0xFF;
+            }
+        }
+
+        /**
+         * Starts asynchronous buffer refresh if needed, depending on current position.
+         *
+         * @param pos Current stream position.
+         */
+        public void refreshAhead(long pos) {
+            if (fullPrefetch(pos)) {
+                first = fetch(pos, bufHalfSize);
+                second = fetch(pos + bufHalfSize, bufHalfSize);
+            }
+            else if (needFlip(pos)) {
+                first = second;
+
+                second = fetch(first.pos + first.len, bufHalfSize);
+            }
+        }
+
+        /**
+         * @param pos Position from which read is expected.
+         * @return Number of bytes available to be read without blocking.
+         */
+        public int available(long pos) {
+            int available = 0;
+
+            if (first != null) {
+                if (first.contains(pos)) {
+                    if (first.ready()) {
+                        available += (pos - first.pos);
+
+                        if (second != null && second.ready())
+                            available += second.len;
+                    }
+                }
+                else {
+                    if (second != null && second.contains(pos) && second.ready())
+                        available += (pos - second.pos);
+                }
+            }
+
+            return available;
+        }
+
+        /**
+         * Checks if position shifted enough to forget previous buffer.
+         *
+         * @param pos Current position.
+         * @return {@code True} if need flip buffers.
+         */
+        private boolean needFlip(long pos) {
+            // Return true if we read more then half of second buffer.
+            return second != null && second.contains(pos);
+        }
+
+        /**
+         * Determines if all cached bytes should be discarded and new region should be
+         * prefetched.
+         *
+         * @param curPos Current stream position.
+         * @return {@code True} if need to refresh both blocks.
+         */
+        private boolean fullPrefetch(long curPos) {
+            // If no data was prefetched yet, return true.
+            return first == null || curPos < first.pos || (second != null && curPos >= second.pos + second.len);
+        }
+
+        /**
+         * Starts asynchronous fetch for given region.
+         *
+         * @param pos Position to read from.
+         * @param size Number of bytes to read.
+         * @return Fetch buffer part.
+         */
+        private FetchBufferPart fetch(long pos, int size) {
+            long remaining = limit - pos;
+
+            size = (int)Math.min(size, remaining);
+
+            return size <= 0 ? null :
+                new FetchBufferPart(delegate.hadoop().readData(delegate, pos, size, null, 0, 0), pos, size);
+        }
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIo.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIo.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIo.java
new file mode 100644
index 0000000..200841a
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIo.java
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+import org.apache.ignite.*;
+import org.apache.ignite.internal.fs.common.*;
+import org.apache.ignite.internal.util.lang.*;
+import org.jetbrains.annotations.*;
+
+/**
+ * IO abstraction layer for GGFS client. Two kind of messages are expected to be sent: requests with response
+ * and request without response.
+ */
+public interface IgfsHadoopIo {
+    /**
+     * Sends given GGFS client message and asynchronously awaits for response.
+     *
+     * @param msg Message to send.
+     * @return Future that will be completed.
+     * @throws IgniteCheckedException If a message cannot be sent (connection is broken or client was closed).
+     */
+    public GridPlainFuture<IgfsMessage> send(IgfsMessage msg) throws IgniteCheckedException;
+
+    /**
+     * Sends given GGFS client message and asynchronously awaits for response. When IO detects response
+     * beginning for given message it stops reading data and passes input stream to closure which can read
+     * response in a specific way.
+     *
+     * @param msg Message to send.
+     * @param outBuf Output buffer. If {@code null}, the output buffer is not used.
+     * @param outOff Output buffer offset.
+     * @param outLen Output buffer length.
+     * @return Future that will be completed when response is returned from closure.
+     * @throws IgniteCheckedException If a message cannot be sent (connection is broken or client was closed).
+     */
+    public <T> GridPlainFuture<T> send(IgfsMessage msg, @Nullable byte[] outBuf, int outOff, int outLen)
+        throws IgniteCheckedException;
+
+    /**
+     * Sends given message and does not wait for response.
+     *
+     * @param msg Message to send.
+     * @throws IgniteCheckedException If send failed.
+     */
+    public void sendPlain(IgfsMessage msg) throws IgniteCheckedException;
+
+    /**
+     * Adds event listener that will be invoked when connection with server is lost or remote error has occurred.
+     * If connection is closed already, callback will be invoked synchronously inside this method.
+     *
+     * @param lsnr Event listener.
+     */
+    public void addEventListener(IgfsHadoopIpcIoListener lsnr);
+
+    /**
+     * Removes event listener that will be invoked when connection with server is lost or remote error has occurred.
+     *
+     * @param lsnr Event listener.
+     */
+    public void removeEventListener(IgfsHadoopIpcIoListener lsnr);
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIpcIo.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIpcIo.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIpcIo.java
new file mode 100644
index 0000000..8f06aa4
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIpcIo.java
@@ -0,0 +1,599 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+import org.apache.commons.logging.*;
+import org.apache.ignite.*;
+import org.apache.ignite.internal.*;
+import org.apache.ignite.internal.fs.common.*;
+import org.apache.ignite.internal.util.*;
+import org.apache.ignite.internal.util.ipc.*;
+import org.apache.ignite.internal.util.ipc.shmem.*;
+import org.apache.ignite.internal.util.lang.*;
+import org.apache.ignite.internal.util.typedef.internal.*;
+import org.jdk8.backport.*;
+import org.jetbrains.annotations.*;
+
+import java.io.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.concurrent.atomic.*;
+import java.util.concurrent.locks.*;
+
+/**
+ * IO layer implementation based on blocking IPC streams.
+ */
+@SuppressWarnings("FieldAccessedSynchronizedAndUnsynchronized")
+public class IgfsHadoopIpcIo implements IgfsHadoopIo {
+    /** Logger. */
+    private Log log;
+
+    /** Request futures map. */
+    private ConcurrentMap<Long, IgfsHadoopFuture> reqMap =
+        new ConcurrentHashMap8<>();
+
+    /** Request ID counter. */
+    private AtomicLong reqIdCnt = new AtomicLong();
+
+    /** Endpoint. */
+    private IpcEndpoint endpoint;
+
+    /** Endpoint output stream. */
+    private IgfsDataOutputStream out;
+
+    /** Protocol. */
+    private final IgfsMarshaller marsh;
+
+    /** Client reader thread. */
+    private Thread reader;
+
+    /** Lock for graceful shutdown. */
+    private final ReadWriteLock busyLock = new ReentrantReadWriteLock();
+
+    /** Stopping flag. */
+    private volatile boolean stopping;
+
+    /** Server endpoint address. */
+    private final String endpointAddr;
+
+    /** Number of open file system sessions. */
+    private final AtomicInteger activeCnt = new AtomicInteger(1);
+
+    /** Event listeners. */
+    private final Collection<IgfsHadoopIpcIoListener> lsnrs =
+        new GridConcurrentHashSet<>();
+
+    /** Cached connections. */
+    private static final ConcurrentMap<String, IgfsHadoopIpcIo> ipcCache =
+        new ConcurrentHashMap8<>();
+
+    /** Striped lock that prevents multiple instance creation in {@link #get(Log, String)}. */
+    private static final GridStripedLock initLock = new GridStripedLock(32);
+
+    /**
+     * @param endpointAddr Endpoint.
+     * @param marsh Protocol.
+     * @param log Logger to use.
+     */
+    public IgfsHadoopIpcIo(String endpointAddr, IgfsMarshaller marsh, Log log) {
+        assert endpointAddr != null;
+        assert marsh != null;
+
+        this.endpointAddr = endpointAddr;
+        this.marsh = marsh;
+        this.log = log;
+    }
+
+    /**
+     * Returns a started and valid instance of this class
+     * for a given endpoint.
+     *
+     * @param log Logger to use for new instance.
+     * @param endpoint Endpoint string.
+     * @return New or existing cached instance, which is started and operational.
+     * @throws IOException If new instance was created but failed to start.
+     */
+    public static IgfsHadoopIpcIo get(Log log, String endpoint) throws IOException {
+        while (true) {
+            IgfsHadoopIpcIo clientIo = ipcCache.get(endpoint);
+
+            if (clientIo != null) {
+                if (clientIo.acquire())
+                    return clientIo;
+                else
+                    // If concurrent close.
+                    ipcCache.remove(endpoint, clientIo);
+            }
+            else {
+                Lock lock = initLock.getLock(endpoint);
+
+                lock.lock();
+
+                try {
+                    clientIo = ipcCache.get(endpoint);
+
+                    if (clientIo != null) { // Perform double check.
+                        if (clientIo.acquire())
+                            return clientIo;
+                        else
+                            // If concurrent close.
+                            ipcCache.remove(endpoint, clientIo);
+                    }
+
+                    // Otherwise try creating a new one.
+                    clientIo = new IgfsHadoopIpcIo(endpoint, new IgfsMarshaller(), log);
+
+                    try {
+                        clientIo.start();
+                    }
+                    catch (IgniteCheckedException e) {
+                        throw new IOException(e.getMessage(), e);
+                    }
+
+                    IgfsHadoopIpcIo old = ipcCache.putIfAbsent(endpoint, clientIo);
+
+                    // Put in exclusive lock.
+                    assert old == null;
+
+                    return clientIo;
+                }
+                finally {
+                    lock.unlock();
+                }
+            }
+        }
+    }
+
+    /**
+     * Increases usage count for this instance.
+     *
+     * @return {@code true} if usage count is greater than zero.
+     */
+    private boolean acquire() {
+        while (true) {
+            int cnt = activeCnt.get();
+
+            if (cnt == 0) {
+                if (log.isDebugEnabled())
+                    log.debug("IPC IO not acquired (count was 0): " + this);
+
+                return false;
+            }
+
+            // Need to make sure that no-one decremented count in between.
+            if (activeCnt.compareAndSet(cnt, cnt + 1)) {
+                if (log.isDebugEnabled())
+                    log.debug("IPC IO acquired: " + this);
+
+                return true;
+            }
+        }
+    }
+
+    /**
+     * Releases this instance, decrementing usage count.
+     * <p>
+     * If usage count becomes zero, the instance is stopped
+     * and removed from cache.
+     */
+    public void release() {
+        while (true) {
+            int cnt = activeCnt.get();
+
+            if (cnt == 0) {
+                if (log.isDebugEnabled())
+                    log.debug("IPC IO not released (count was 0): " + this);
+
+                return;
+            }
+
+            if (activeCnt.compareAndSet(cnt, cnt - 1)) {
+                if (cnt == 1) {
+                    ipcCache.remove(endpointAddr, this);
+
+                    if (log.isDebugEnabled())
+                        log.debug("IPC IO stopping as unused: " + this);
+
+                    stop();
+                }
+                else if (log.isDebugEnabled())
+                    log.debug("IPC IO released: " + this);
+
+                return;
+            }
+        }
+    }
+
+    /**
+     * Closes this IO instance, removing it from cache.
+     */
+    public void forceClose() {
+        if (ipcCache.remove(endpointAddr, this))
+            stop();
+    }
+
+    /**
+     * Starts the IO.
+     *
+     * @throws IgniteCheckedException If failed to connect the endpoint.
+     */
+    private void start() throws IgniteCheckedException {
+        boolean success = false;
+
+        try {
+            endpoint = IpcEndpointFactory.connectEndpoint(
+                    endpointAddr, new GridLoggerProxy(new IgfsHadoopJclLogger(log), null, null, ""));
+
+            out = new IgfsDataOutputStream(new BufferedOutputStream(endpoint.outputStream()));
+
+            reader = new ReaderThread();
+
+            // Required for Hadoop 2.x
+            reader.setDaemon(true);
+
+            reader.start();
+
+            success = true;
+        }
+        catch (IgniteCheckedException e) {
+            IpcOutOfSystemResourcesException resEx = e.getCause(IpcOutOfSystemResourcesException.class);
+
+            if (resEx != null)
+                throw new IgniteCheckedException(IpcSharedMemoryServerEndpoint.OUT_OF_RESOURCES_MSG, resEx);
+
+            throw e;
+        }
+        finally {
+            if (!success)
+                stop();
+        }
+    }
+
+    /**
+     * Shuts down the IO. No send requests will be accepted anymore, all pending futures will be failed.
+     * Close listeners will be invoked as if connection is closed by server.
+     */
+    private void stop() {
+        close0(null);
+
+        if (reader != null) {
+            try {
+                U.interrupt(reader);
+                U.join(reader);
+
+                reader = null;
+            }
+            catch (IgniteInterruptedCheckedException ignored) {
+                Thread.currentThread().interrupt();
+
+                log.warn("Got interrupted while waiting for reader thread to shut down (will return).");
+            }
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void addEventListener(IgfsHadoopIpcIoListener lsnr) {
+        if (!busyLock.readLock().tryLock()) {
+            lsnr.onClose();
+
+            return;
+        }
+
+        boolean invokeNow = false;
+
+        try {
+            invokeNow = stopping;
+
+            if (!invokeNow)
+                lsnrs.add(lsnr);
+        }
+        finally {
+            busyLock.readLock().unlock();
+
+            if (invokeNow)
+                lsnr.onClose();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void removeEventListener(IgfsHadoopIpcIoListener lsnr) {
+        lsnrs.remove(lsnr);
+    }
+
+    /** {@inheritDoc} */
+    @Override public GridPlainFuture<IgfsMessage> send(IgfsMessage msg) throws IgniteCheckedException {
+        return send(msg, null, 0, 0);
+    }
+
+    /** {@inheritDoc} */
+    @Override public <T> GridPlainFuture<T> send(IgfsMessage msg, @Nullable byte[] outBuf, int outOff,
+        int outLen) throws IgniteCheckedException {
+        assert outBuf == null || msg.command() == IgfsIpcCommand.READ_BLOCK;
+
+        if (!busyLock.readLock().tryLock())
+            throw new IgfsHadoopCommunicationException("Failed to send message (client is being concurrently " +
+                "closed).");
+
+        try {
+            if (stopping)
+                throw new IgfsHadoopCommunicationException("Failed to send message (client is being concurrently " +
+                    "closed).");
+
+            long reqId = reqIdCnt.getAndIncrement();
+
+            IgfsHadoopFuture<T> fut = new IgfsHadoopFuture<>();
+
+            fut.outputBuffer(outBuf);
+            fut.outputOffset(outOff);
+            fut.outputLength(outLen);
+            fut.read(msg.command() == IgfsIpcCommand.READ_BLOCK);
+
+            IgfsHadoopFuture oldFut = reqMap.putIfAbsent(reqId, fut);
+
+            assert oldFut == null;
+
+            if (log.isDebugEnabled())
+                log.debug("Sending GGFS message [reqId=" + reqId + ", msg=" + msg + ']');
+
+            byte[] hdr = IgfsMarshaller.createHeader(reqId, msg.command());
+
+            IgniteCheckedException err = null;
+
+            try {
+                synchronized (this) {
+                    marsh.marshall(msg, hdr, out);
+
+                    out.flush(); // Blocking operation + sometimes system call.
+                }
+            }
+            catch (IgniteCheckedException e) {
+                err = e;
+            }
+            catch (IOException e) {
+                err = new IgfsHadoopCommunicationException(e);
+            }
+
+            if (err != null) {
+                reqMap.remove(reqId, fut);
+
+                fut.onDone(err);
+            }
+
+            return fut;
+        }
+        finally {
+            busyLock.readLock().unlock();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void sendPlain(IgfsMessage msg) throws IgniteCheckedException {
+        if (!busyLock.readLock().tryLock())
+            throw new IgfsHadoopCommunicationException("Failed to send message (client is being " +
+                "concurrently closed).");
+
+        try {
+            if (stopping)
+                throw new IgfsHadoopCommunicationException("Failed to send message (client is being concurrently closed).");
+
+            assert msg.command() == IgfsIpcCommand.WRITE_BLOCK;
+
+            IgfsStreamControlRequest req = (IgfsStreamControlRequest)msg;
+
+            byte[] hdr = IgfsMarshaller.createHeader(-1, IgfsIpcCommand.WRITE_BLOCK);
+
+            U.longToBytes(req.streamId(), hdr, 12);
+            U.intToBytes(req.length(), hdr, 20);
+
+            synchronized (this) {
+                out.write(hdr);
+                out.write(req.data(), (int)req.position(), req.length());
+
+                out.flush();
+            }
+        }
+        catch (IOException e) {
+            throw new IgfsHadoopCommunicationException(e);
+        }
+        finally {
+            busyLock.readLock().unlock();
+        }
+    }
+
+    /**
+     * Closes client but does not wait.
+     *
+     * @param err Error.
+     */
+    private void close0(@Nullable Throwable err) {
+        busyLock.writeLock().lock();
+
+        try {
+            if (stopping)
+                return;
+
+            stopping = true;
+        }
+        finally {
+            busyLock.writeLock().unlock();
+        }
+
+        if (err == null)
+            err = new IgniteCheckedException("Failed to perform request (connection was concurrently closed before response " +
+                "is received).");
+
+        // Clean up resources.
+        U.closeQuiet(out);
+
+        if (endpoint != null)
+            endpoint.close();
+
+        // Unwind futures. We can safely iterate here because no more futures will be added.
+        Iterator<IgfsHadoopFuture> it = reqMap.values().iterator();
+
+        while (it.hasNext()) {
+            IgfsHadoopFuture fut = it.next();
+
+            fut.onDone(err);
+
+            it.remove();
+        }
+
+        for (IgfsHadoopIpcIoListener lsnr : lsnrs)
+            lsnr.onClose();
+    }
+
+    /**
+     * Do not extend {@code GridThread} to minimize class dependencies.
+     */
+    private class ReaderThread extends Thread {
+        /** {@inheritDoc} */
+        @SuppressWarnings("unchecked")
+        @Override public void run() {
+            // Error to fail pending futures.
+            Throwable err = null;
+
+            try {
+                InputStream in = endpoint.inputStream();
+
+                IgfsDataInputStream dis = new IgfsDataInputStream(in);
+
+                byte[] hdr = new byte[IgfsMarshaller.HEADER_SIZE];
+                byte[] msgHdr = new byte[IgfsControlResponse.RES_HEADER_SIZE];
+
+                while (!Thread.currentThread().isInterrupted()) {
+                    dis.readFully(hdr);
+
+                    long reqId = U.bytesToLong(hdr, 0);
+
+                    // We don't wait for write responses, therefore reqId is -1.
+                    if (reqId == -1) {
+                        // We received a response which normally should not be sent. It must contain an error.
+                        dis.readFully(msgHdr);
+
+                        assert msgHdr[4] != 0;
+
+                        String errMsg = dis.readUTF();
+
+                        // Error code.
+                        dis.readInt();
+
+                        long streamId = dis.readLong();
+
+                        for (IgfsHadoopIpcIoListener lsnr : lsnrs)
+                            lsnr.onError(streamId, errMsg);
+                    }
+                    else {
+                        IgfsHadoopFuture<Object> fut = reqMap.remove(reqId);
+
+                        if (fut == null) {
+                            String msg = "Failed to read response from server: response closure is unavailable for " +
+                                "requestId (will close connection):" + reqId;
+
+                            log.warn(msg);
+
+                            err = new IgniteCheckedException(msg);
+
+                            break;
+                        }
+                        else {
+                            try {
+                                IgfsIpcCommand cmd = IgfsIpcCommand.valueOf(U.bytesToInt(hdr, 8));
+
+                                if (log.isDebugEnabled())
+                                    log.debug("Received GGFS response [reqId=" + reqId + ", cmd=" + cmd + ']');
+
+                                Object res = null;
+
+                                if (fut.read()) {
+                                    dis.readFully(msgHdr);
+
+                                    boolean hasErr = msgHdr[4] != 0;
+
+                                    if (hasErr) {
+                                        String errMsg = dis.readUTF();
+
+                                        // Error code.
+                                        Integer errCode = dis.readInt();
+
+                                        IgfsControlResponse.throwError(errCode, errMsg);
+                                    }
+
+                                    int blockLen = U.bytesToInt(msgHdr, 5);
+
+                                    int readLen = Math.min(blockLen, fut.outputLength());
+
+                                    if (readLen > 0) {
+                                        assert fut.outputBuffer() != null;
+
+                                        dis.readFully(fut.outputBuffer(), fut.outputOffset(), readLen);
+                                    }
+
+                                    if (readLen != blockLen) {
+                                        byte[] buf = new byte[blockLen - readLen];
+
+                                        dis.readFully(buf);
+
+                                        res = buf;
+                                    }
+                                }
+                                else
+                                    res = marsh.unmarshall(cmd, hdr, dis);
+
+                                fut.onDone(res);
+                            }
+                            catch (IgniteCheckedException e) {
+                                if (log.isDebugEnabled())
+                                    log.debug("Failed to apply response closure (will fail request future): " +
+                                        e.getMessage());
+
+                                fut.onDone(e);
+
+                                err = e;
+                            }
+                        }
+                    }
+                }
+            }
+            catch (EOFException ignored) {
+                err = new IgniteCheckedException("Failed to read response from server (connection was closed by remote peer).");
+            }
+            catch (IOException e) {
+                if (!stopping)
+                    log.error("Failed to read data (connection will be closed)", e);
+
+                err = new IgfsHadoopCommunicationException(e);
+            }
+            catch (IgniteCheckedException e) {
+                if (!stopping)
+                    log.error("Failed to obtain endpoint input stream (connection will be closed)", e);
+
+                err = e;
+            }
+            finally {
+                close0(err);
+            }
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public String toString() {
+        return getClass().getSimpleName() + " [endpointAddr=" + endpointAddr + ", activeCnt=" + activeCnt +
+            ", stopping=" + stopping + ']';
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIpcIoListener.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIpcIoListener.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIpcIoListener.java
new file mode 100644
index 0000000..65fe2d4
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopIpcIoListener.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+/**
+ * Listens to the events of {@link IgfsHadoopIpcIo}.
+ */
+public interface IgfsHadoopIpcIoListener {
+    /**
+     * Callback invoked when the IO is being closed.
+     */
+    public void onClose();
+
+    /**
+     * Callback invoked when remote error occurs.
+     *
+     * @param streamId Stream ID.
+     * @param errMsg Error message.
+     */
+    public void onError(long streamId, String errMsg);
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopJclLogger.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopJclLogger.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopJclLogger.java
new file mode 100644
index 0000000..530fbc9
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopJclLogger.java
@@ -0,0 +1,115 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+import org.apache.commons.logging.*;
+import org.apache.ignite.*;
+import org.jetbrains.annotations.*;
+
+/**
+ * JCL logger wrapper for Hadoop.
+ */
+public class IgfsHadoopJclLogger implements IgniteLogger {
+    /** */
+    private static final long serialVersionUID = 0L;
+
+    /** JCL implementation proxy. */
+    private Log impl;
+
+    /**
+     * Constructor.
+     *
+     * @param impl JCL implementation to use.
+     */
+    IgfsHadoopJclLogger(Log impl) {
+        assert impl != null;
+
+        this.impl = impl;
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgniteLogger getLogger(Object ctgr) {
+        return new IgfsHadoopJclLogger(LogFactory.getLog(
+            ctgr instanceof Class ? ((Class)ctgr).getName() : String.valueOf(ctgr)));
+    }
+
+    /** {@inheritDoc} */
+    @Override public void trace(String msg) {
+        impl.trace(msg);
+    }
+
+    /** {@inheritDoc} */
+    @Override public void debug(String msg) {
+        impl.debug(msg);
+    }
+
+    /** {@inheritDoc} */
+    @Override public void info(String msg) {
+        impl.info(msg);
+    }
+
+    /** {@inheritDoc} */
+    @Override public void warning(String msg) {
+        impl.warn(msg);
+    }
+
+    /** {@inheritDoc} */
+    @Override public void warning(String msg, @Nullable Throwable e) {
+        impl.warn(msg, e);
+    }
+
+    /** {@inheritDoc} */
+    @Override public void error(String msg) {
+        impl.error(msg);
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isQuiet() {
+        return !isInfoEnabled() && !isDebugEnabled();
+    }
+
+    /** {@inheritDoc} */
+    @Override public void error(String msg, @Nullable Throwable e) {
+        impl.error(msg, e);
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isTraceEnabled() {
+        return impl.isTraceEnabled();
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isDebugEnabled() {
+        return impl.isDebugEnabled();
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean isInfoEnabled() {
+        return impl.isInfoEnabled();
+    }
+
+    /** {@inheritDoc} */
+    @Nullable @Override public String fileName() {
+        return null;
+    }
+
+    /** {@inheritDoc} */
+    @Override public String toString() {
+        return "GridGgfsHadoopJclLogger [impl=" + impl + ']';
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopOutProc.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopOutProc.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopOutProc.java
new file mode 100644
index 0000000..a98b077
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopOutProc.java
@@ -0,0 +1,466 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+import org.apache.commons.logging.*;
+import org.apache.ignite.*;
+import org.apache.ignite.ignitefs.*;
+import org.apache.ignite.internal.fs.common.*;
+import org.apache.ignite.internal.processors.fs.*;
+import org.apache.ignite.internal.util.lang.*;
+import org.jdk8.backport.*;
+import org.jetbrains.annotations.*;
+
+import java.io.*;
+import java.util.*;
+
+import static org.apache.ignite.internal.fs.common.IgfsIpcCommand.*;
+
+/**
+ * Communication with external process (TCP or shmem).
+ */
+public class IgfsHadoopOutProc implements IgfsHadoopEx, IgfsHadoopIpcIoListener {
+    /** Expected result is boolean. */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>, Boolean> BOOL_RES = createClosure();
+
+    /** Expected result is boolean. */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>, Long> LONG_RES = createClosure();
+
+    /** Expected result is {@code GridGgfsFile}. */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>, IgniteFsFile> FILE_RES = createClosure();
+
+    /** Expected result is {@code GridGgfsHandshakeResponse} */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>,
+        IgfsHandshakeResponse> HANDSHAKE_RES = createClosure();
+
+    /** Expected result is {@code GridGgfsStatus} */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>, IgfsStatus> STATUS_RES =
+        createClosure();
+
+    /** Expected result is {@code GridGgfsFile}. */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>,
+        IgfsInputStreamDescriptor> STREAM_DESCRIPTOR_RES = createClosure();
+
+    /** Expected result is {@code GridGgfsFile}. */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>,
+        Collection<IgniteFsFile>> FILE_COL_RES = createClosure();
+
+    /** Expected result is {@code GridGgfsFile}. */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>,
+        Collection<IgniteFsPath>> PATH_COL_RES = createClosure();
+
+    /** Expected result is {@code GridGgfsPathSummary}. */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>, IgniteFsPathSummary> SUMMARY_RES =
+        createClosure();
+
+    /** Expected result is {@code GridGgfsFile}. */
+    private static final GridPlainClosure<GridPlainFuture<IgfsMessage>,
+        Collection<IgniteFsBlockLocation>> BLOCK_LOCATION_COL_RES = createClosure();
+
+    /** Grid name. */
+    private final String grid;
+
+    /** GGFS name. */
+    private final String ggfs;
+
+    /** Client log. */
+    private final Log log;
+
+    /** Client IO. */
+    private final IgfsHadoopIpcIo io;
+
+    /** Event listeners. */
+    private final Map<Long, IgfsHadoopStreamEventListener> lsnrs = new ConcurrentHashMap8<>();
+
+    /**
+     * Constructor for TCP endpoint.
+     *
+     * @param host Host.
+     * @param port Port.
+     * @param grid Grid name.
+     * @param ggfs GGFS name.
+     * @param log Client logger.
+     * @throws IOException If failed.
+     */
+    public IgfsHadoopOutProc(String host, int port, String grid, String ggfs, Log log) throws IOException {
+        this(host, port, grid, ggfs, false, log);
+    }
+
+    /**
+     * Constructor for shmem endpoint.
+     *
+     * @param port Port.
+     * @param grid Grid name.
+     * @param ggfs GGFS name.
+     * @param log Client logger.
+     * @throws IOException If failed.
+     */
+    public IgfsHadoopOutProc(int port, String grid, String ggfs, Log log) throws IOException {
+        this(null, port, grid, ggfs, true, log);
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param host Host.
+     * @param port Port.
+     * @param grid Grid name.
+     * @param ggfs GGFS name.
+     * @param shmem Shared memory flag.
+     * @param log Client logger.
+     * @throws IOException If failed.
+     */
+    private IgfsHadoopOutProc(String host, int port, String grid, String ggfs, boolean shmem, Log log)
+        throws IOException {
+        assert host != null && !shmem || host == null && shmem :
+            "Invalid arguments [host=" + host + ", port=" + port + ", shmem=" + shmem + ']';
+
+        String endpoint = host != null ? host + ":" + port : "shmem:" + port;
+
+        this.grid = grid;
+        this.ggfs = ggfs;
+        this.log = log;
+
+        io = IgfsHadoopIpcIo.get(log, endpoint);
+
+        io.addEventListener(this);
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgfsHandshakeResponse handshake(String logDir) throws IgniteCheckedException {
+        final IgfsHandshakeRequest req = new IgfsHandshakeRequest();
+
+        req.gridName(grid);
+        req.ggfsName(ggfs);
+        req.logDirectory(logDir);
+
+        return io.send(req).chain(HANDSHAKE_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public void close(boolean force) {
+        assert io != null;
+
+        io.removeEventListener(this);
+
+        if (force)
+            io.forceClose();
+        else
+            io.release();
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgniteFsFile info(IgniteFsPath path) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(INFO);
+        msg.path(path);
+
+        return io.send(msg).chain(FILE_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgniteFsFile update(IgniteFsPath path, Map<String, String> props) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(UPDATE);
+        msg.path(path);
+        msg.properties(props);
+
+        return io.send(msg).chain(FILE_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public Boolean setTimes(IgniteFsPath path, long accessTime, long modificationTime) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(SET_TIMES);
+        msg.path(path);
+        msg.accessTime(accessTime);
+        msg.modificationTime(modificationTime);
+
+        return io.send(msg).chain(BOOL_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public Boolean rename(IgniteFsPath src, IgniteFsPath dest) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(RENAME);
+        msg.path(src);
+        msg.destinationPath(dest);
+
+        return io.send(msg).chain(BOOL_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public Boolean delete(IgniteFsPath path, boolean recursive) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(DELETE);
+        msg.path(path);
+        msg.flag(recursive);
+
+        return io.send(msg).chain(BOOL_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public Collection<IgniteFsBlockLocation> affinity(IgniteFsPath path, long start, long len)
+        throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(AFFINITY);
+        msg.path(path);
+        msg.start(start);
+        msg.length(len);
+
+        return io.send(msg).chain(BLOCK_LOCATION_COL_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgniteFsPathSummary contentSummary(IgniteFsPath path) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(PATH_SUMMARY);
+        msg.path(path);
+
+        return io.send(msg).chain(SUMMARY_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public Boolean mkdirs(IgniteFsPath path, Map<String, String> props) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(MAKE_DIRECTORIES);
+        msg.path(path);
+        msg.properties(props);
+
+        return io.send(msg).chain(BOOL_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public Collection<IgniteFsFile> listFiles(IgniteFsPath path) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(LIST_FILES);
+        msg.path(path);
+
+        return io.send(msg).chain(FILE_COL_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public Collection<IgniteFsPath> listPaths(IgniteFsPath path) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(LIST_PATHS);
+        msg.path(path);
+
+        return io.send(msg).chain(PATH_COL_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgfsStatus fsStatus() throws IgniteCheckedException {
+        return io.send(new IgfsStatusRequest()).chain(STATUS_RES).get();
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgfsHadoopStreamDelegate open(IgniteFsPath path) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(OPEN_READ);
+        msg.path(path);
+        msg.flag(false);
+
+        IgfsInputStreamDescriptor rmtDesc = io.send(msg).chain(STREAM_DESCRIPTOR_RES).get();
+
+        return new IgfsHadoopStreamDelegate(this, rmtDesc.streamId(), rmtDesc.length());
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgfsHadoopStreamDelegate open(IgniteFsPath path,
+        int seqReadsBeforePrefetch) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(OPEN_READ);
+        msg.path(path);
+        msg.flag(true);
+        msg.sequentialReadsBeforePrefetch(seqReadsBeforePrefetch);
+
+        IgfsInputStreamDescriptor rmtDesc = io.send(msg).chain(STREAM_DESCRIPTOR_RES).get();
+
+        return new IgfsHadoopStreamDelegate(this, rmtDesc.streamId(), rmtDesc.length());
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgfsHadoopStreamDelegate create(IgniteFsPath path, boolean overwrite, boolean colocate,
+        int replication, long blockSize, @Nullable Map<String, String> props) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(OPEN_CREATE);
+        msg.path(path);
+        msg.flag(overwrite);
+        msg.colocate(colocate);
+        msg.properties(props);
+        msg.replication(replication);
+        msg.blockSize(blockSize);
+
+        Long streamId = io.send(msg).chain(LONG_RES).get();
+
+        return new IgfsHadoopStreamDelegate(this, streamId);
+    }
+
+    /** {@inheritDoc} */
+    @Override public IgfsHadoopStreamDelegate append(IgniteFsPath path, boolean create,
+        @Nullable Map<String, String> props) throws IgniteCheckedException {
+        final IgfsPathControlRequest msg = new IgfsPathControlRequest();
+
+        msg.command(OPEN_APPEND);
+        msg.path(path);
+        msg.flag(create);
+        msg.properties(props);
+
+        Long streamId = io.send(msg).chain(LONG_RES).get();
+
+        return new IgfsHadoopStreamDelegate(this, streamId);
+    }
+
+    /** {@inheritDoc} */
+    @Override public GridPlainFuture<byte[]> readData(IgfsHadoopStreamDelegate desc, long pos, int len,
+        final @Nullable byte[] outBuf, final int outOff, final int outLen) {
+        assert len > 0;
+
+        final IgfsStreamControlRequest msg = new IgfsStreamControlRequest();
+
+        msg.command(READ_BLOCK);
+        msg.streamId((long) desc.target());
+        msg.position(pos);
+        msg.length(len);
+
+        try {
+            return io.send(msg, outBuf, outOff, outLen);
+        }
+        catch (IgniteCheckedException e) {
+            return new GridPlainFutureAdapter<>(e);
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void writeData(IgfsHadoopStreamDelegate desc, byte[] data, int off, int len)
+        throws IOException {
+        final IgfsStreamControlRequest msg = new IgfsStreamControlRequest();
+
+        msg.command(WRITE_BLOCK);
+        msg.streamId((long) desc.target());
+        msg.data(data);
+        msg.position(off);
+        msg.length(len);
+
+        try {
+            io.sendPlain(msg);
+        }
+        catch (IgniteCheckedException e) {
+            throw IgfsHadoopUtils.cast(e);
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void flush(IgfsHadoopStreamDelegate delegate) throws IOException {
+        // No-op.
+    }
+
+    /** {@inheritDoc} */
+    @Override public void closeStream(IgfsHadoopStreamDelegate desc) throws IOException {
+        final IgfsStreamControlRequest msg = new IgfsStreamControlRequest();
+
+        msg.command(CLOSE);
+        msg.streamId((long)desc.target());
+
+        try {
+            io.send(msg).chain(BOOL_RES).get();
+        }
+        catch (IgniteCheckedException e) {
+            throw IgfsHadoopUtils.cast(e);
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void addEventListener(IgfsHadoopStreamDelegate desc,
+        IgfsHadoopStreamEventListener lsnr) {
+        long streamId = desc.target();
+
+        IgfsHadoopStreamEventListener lsnr0 = lsnrs.put(streamId, lsnr);
+
+        assert lsnr0 == null || lsnr0 == lsnr;
+
+        if (log.isDebugEnabled())
+            log.debug("Added stream event listener [streamId=" + streamId + ']');
+    }
+
+    /** {@inheritDoc} */
+    @Override public void removeEventListener(IgfsHadoopStreamDelegate desc) {
+        long streamId = desc.target();
+
+        IgfsHadoopStreamEventListener lsnr0 = lsnrs.remove(streamId);
+
+        if (lsnr0 != null && log.isDebugEnabled())
+            log.debug("Removed stream event listener [streamId=" + streamId + ']');
+    }
+
+    /** {@inheritDoc} */
+    @Override public void onClose() {
+        for (IgfsHadoopStreamEventListener lsnr : lsnrs.values()) {
+            try {
+                lsnr.onClose();
+            }
+            catch (IgniteCheckedException e) {
+                log.warn("Got exception from stream event listener (will ignore): " + lsnr, e);
+            }
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void onError(long streamId, String errMsg) {
+        IgfsHadoopStreamEventListener lsnr = lsnrs.get(streamId);
+
+        if (lsnr != null)
+            lsnr.onError(errMsg);
+        else
+            log.warn("Received write error response for not registered output stream (will ignore) " +
+                "[streamId= " + streamId + ']');
+    }
+
+    /**
+     * Creates conversion closure for given type.
+     *
+     * @param <T> Type of expected result.
+     * @return Conversion closure.
+     */
+    @SuppressWarnings("unchecked")
+    private static <T> GridPlainClosure<GridPlainFuture<IgfsMessage>, T> createClosure() {
+        return new GridPlainClosure<GridPlainFuture<IgfsMessage>, T>() {
+            @Override public T apply(GridPlainFuture<IgfsMessage> fut) throws IgniteCheckedException {
+                IgfsControlResponse res = (IgfsControlResponse)fut.get();
+
+                if (res.hasError())
+                    res.throwError();
+
+                return (T)res.response();
+            }
+        };
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopOutputStream.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopOutputStream.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopOutputStream.java
new file mode 100644
index 0000000..f904d36
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopOutputStream.java
@@ -0,0 +1,201 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+import org.apache.commons.logging.*;
+import org.apache.ignite.*;
+import org.apache.ignite.internal.fs.common.*;
+import org.jetbrains.annotations.*;
+
+import java.io.*;
+
+/**
+ * GGFS Hadoop output stream implementation.
+ */
+public class IgfsHadoopOutputStream extends OutputStream implements IgfsHadoopStreamEventListener {
+    /** Log instance. */
+    private Log log;
+
+    /** Client logger. */
+    private IgfsLogger clientLog;
+
+    /** Log stream ID. */
+    private long logStreamId;
+
+    /** Server stream delegate. */
+    private IgfsHadoopStreamDelegate delegate;
+
+    /** Closed flag. */
+    private volatile boolean closed;
+
+    /** Flag set if stream was closed due to connection breakage. */
+    private boolean connBroken;
+
+    /** Error message. */
+    private volatile String errMsg;
+
+    /** Read time. */
+    private long writeTime;
+
+    /** User time. */
+    private long userTime;
+
+    /** Last timestamp. */
+    private long lastTs;
+
+    /** Amount of written bytes. */
+    private long total;
+
+    /**
+     * Creates light output stream.
+     *
+     * @param delegate Server stream delegate.
+     * @param log Logger to use.
+     * @param clientLog Client logger.
+     */
+    public IgfsHadoopOutputStream(IgfsHadoopStreamDelegate delegate, Log log,
+        IgfsLogger clientLog, long logStreamId) {
+        this.delegate = delegate;
+        this.log = log;
+        this.clientLog = clientLog;
+        this.logStreamId = logStreamId;
+
+        lastTs = System.nanoTime();
+
+        delegate.hadoop().addEventListener(delegate, this);
+    }
+
+    /**
+     * Read start.
+     */
+    private void writeStart() {
+        long now = System.nanoTime();
+
+        userTime += now - lastTs;
+
+        lastTs = now;
+    }
+
+    /**
+     * Read end.
+     */
+    private void writeEnd() {
+        long now = System.nanoTime();
+
+        writeTime += now - lastTs;
+
+        lastTs = now;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void write(@NotNull byte[] b, int off, int len) throws IOException {
+        check();
+
+        writeStart();
+
+        try {
+            delegate.hadoop().writeData(delegate, b, off, len);
+
+            total += len;
+        }
+        finally {
+            writeEnd();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void write(int b) throws IOException {
+        write(new byte[] {(byte)b});
+
+        total++;
+    }
+
+    /** {@inheritDoc} */
+    @Override public void flush() throws IOException {
+        delegate.hadoop().flush(delegate);
+    }
+
+    /** {@inheritDoc} */
+    @Override public void close() throws IOException {
+        if (!closed) {
+            if (log.isDebugEnabled())
+                log.debug("Closing output stream: " + delegate);
+
+            writeStart();
+
+            delegate.hadoop().closeStream(delegate);
+
+            markClosed(false);
+
+            writeEnd();
+
+            if (clientLog.isLogEnabled())
+                clientLog.logCloseOut(logStreamId, userTime, writeTime, total);
+
+            if (log.isDebugEnabled())
+                log.debug("Closed output stream [delegate=" + delegate + ", writeTime=" + writeTime / 1000 +
+                    ", userTime=" + userTime / 1000 + ']');
+        }
+        else if(connBroken)
+            throw new IOException(
+                "Failed to close stream, because connection was broken (data could have been lost).");
+    }
+
+    /**
+     * Marks stream as closed.
+     *
+     * @param connBroken {@code True} if connection with server was lost.
+     */
+    private void markClosed(boolean connBroken) {
+        // It is ok to have race here.
+        if (!closed) {
+            closed = true;
+
+            delegate.hadoop().removeEventListener(delegate);
+
+            this.connBroken = connBroken;
+        }
+    }
+
+    /**
+     * @throws IOException If check failed.
+     */
+    private void check() throws IOException {
+        String errMsg0 = errMsg;
+
+        if (errMsg0 != null)
+            throw new IOException(errMsg0);
+
+        if (closed) {
+            if (connBroken)
+                throw new IOException("Server connection was lost.");
+            else
+                throw new IOException("Stream is closed.");
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public void onClose() throws IgniteCheckedException {
+        markClosed(true);
+    }
+
+    /** {@inheritDoc} */
+    @Override public void onError(String errMsg) {
+        this.errMsg = errMsg;
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopProxyInputStream.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopProxyInputStream.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopProxyInputStream.java
new file mode 100644
index 0000000..b0c7c91
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopProxyInputStream.java
@@ -0,0 +1,335 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+import org.apache.hadoop.fs.*;
+import org.apache.ignite.internal.fs.common.*;
+
+import java.io.*;
+
+/**
+ * Secondary Hadoop file system input stream wrapper.
+ */
+public class IgfsHadoopProxyInputStream extends InputStream implements Seekable, PositionedReadable {
+    /** Actual input stream to the secondary file system. */
+    private final FSDataInputStream is;
+
+    /** Client logger. */
+    private final IgfsLogger clientLog;
+
+    /** Log stream ID. */
+    private final long logStreamId;
+
+    /** Read time. */
+    private long readTime;
+
+    /** User time. */
+    private long userTime;
+
+    /** Last timestamp. */
+    private long lastTs;
+
+    /** Amount of read bytes. */
+    private long total;
+
+    /** Closed flag. */
+    private boolean closed;
+
+    /**
+     * Constructor.
+     *
+     * @param is Actual input stream to the secondary file system.
+     * @param clientLog Client log.
+     */
+    public IgfsHadoopProxyInputStream(FSDataInputStream is, IgfsLogger clientLog, long logStreamId) {
+        assert is != null;
+        assert clientLog != null;
+
+        this.is = is;
+        this.clientLog = clientLog;
+        this.logStreamId = logStreamId;
+
+        lastTs = System.nanoTime();
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized int read(byte[] b) throws IOException {
+        readStart();
+
+        int res;
+
+        try {
+            res = is.read(b);
+        }
+        finally {
+            readEnd();
+        }
+
+        if (res != -1)
+            total += res;
+
+        return res;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized int read(byte[] b, int off, int len) throws IOException {
+        readStart();
+
+        int res;
+
+        try {
+            res = super.read(b, off, len);
+        }
+        finally {
+            readEnd();
+        }
+
+        if (res != -1)
+            total += res;
+
+        return res;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized long skip(long n) throws IOException {
+        readStart();
+
+        long res;
+
+        try {
+            res =  is.skip(n);
+        }
+        finally {
+            readEnd();
+        }
+
+        if (clientLog.isLogEnabled())
+            clientLog.logSkip(logStreamId, res);
+
+        return res;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized int available() throws IOException {
+        readStart();
+
+        try {
+            return is.available();
+        }
+        finally {
+            readEnd();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void close() throws IOException {
+        if (!closed) {
+            closed = true;
+
+            readStart();
+
+            try {
+                is.close();
+            }
+            finally {
+                readEnd();
+            }
+
+            if (clientLog.isLogEnabled())
+                clientLog.logCloseIn(logStreamId, userTime, readTime, total);
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void mark(int readLimit) {
+        readStart();
+
+        try {
+            is.mark(readLimit);
+        }
+        finally {
+            readEnd();
+        }
+
+        if (clientLog.isLogEnabled())
+            clientLog.logMark(logStreamId, readLimit);
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void reset() throws IOException {
+        readStart();
+
+        try {
+            is.reset();
+        }
+        finally {
+            readEnd();
+        }
+
+        if (clientLog.isLogEnabled())
+            clientLog.logReset(logStreamId);
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized boolean markSupported() {
+        readStart();
+
+        try {
+            return is.markSupported();
+        }
+        finally {
+            readEnd();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized int read() throws IOException {
+        readStart();
+
+        int res;
+
+        try {
+            res = is.read();
+        }
+        finally {
+            readEnd();
+        }
+
+        if (res != -1)
+            total++;
+
+        return res;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized int read(long pos, byte[] buf, int off, int len) throws IOException {
+        readStart();
+
+        int res;
+
+        try {
+            res = is.read(pos, buf, off, len);
+        }
+        finally {
+            readEnd();
+        }
+
+        if (res != -1)
+            total += res;
+
+        if (clientLog.isLogEnabled())
+            clientLog.logRandomRead(logStreamId, pos, res);
+
+        return res;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void readFully(long pos, byte[] buf, int off, int len) throws IOException {
+        readStart();
+
+        try {
+            is.readFully(pos, buf, off, len);
+        }
+        finally {
+            readEnd();
+        }
+
+        total += len;
+
+        if (clientLog.isLogEnabled())
+            clientLog.logRandomRead(logStreamId, pos, len);
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void readFully(long pos, byte[] buf) throws IOException {
+        readStart();
+
+        try {
+            is.readFully(pos, buf);
+        }
+        finally {
+            readEnd();
+        }
+
+        total += buf.length;
+
+        if (clientLog.isLogEnabled())
+            clientLog.logRandomRead(logStreamId, pos, buf.length);
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void seek(long pos) throws IOException {
+        readStart();
+
+        try {
+            is.seek(pos);
+        }
+        finally {
+            readEnd();
+        }
+
+        if (clientLog.isLogEnabled())
+            clientLog.logSeek(logStreamId, pos);
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized long getPos() throws IOException {
+        readStart();
+
+        try {
+            return is.getPos();
+        }
+        finally {
+            readEnd();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized boolean seekToNewSource(long targetPos) throws IOException {
+        readStart();
+
+        try {
+            return is.seekToNewSource(targetPos);
+        }
+        finally {
+            readEnd();
+        }
+    }
+
+    /**
+     * Read start.
+     */
+    private void readStart() {
+        long now = System.nanoTime();
+
+        userTime += now - lastTs;
+
+        lastTs = now;
+    }
+
+    /**
+     * Read end.
+     */
+    private void readEnd() {
+        long now = System.nanoTime();
+
+        readTime += now - lastTs;
+
+        lastTs = now;
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopProxyOutputStream.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopProxyOutputStream.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopProxyOutputStream.java
new file mode 100644
index 0000000..872f5b7
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopProxyOutputStream.java
@@ -0,0 +1,165 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+import org.apache.hadoop.fs.*;
+import org.apache.ignite.internal.fs.common.*;
+
+import java.io.*;
+
+/**
+ * Secondary Hadoop file system output stream wrapper.
+ */
+public class IgfsHadoopProxyOutputStream extends OutputStream {
+    /** Actual output stream. */
+    private FSDataOutputStream os;
+
+    /** Client logger. */
+    private final IgfsLogger clientLog;
+
+    /** Log stream ID. */
+    private final long logStreamId;
+
+    /** Read time. */
+    private long writeTime;
+
+    /** User time. */
+    private long userTime;
+
+    /** Last timestamp. */
+    private long lastTs;
+
+    /** Amount of written bytes. */
+    private long total;
+
+    /** Closed flag. */
+    private boolean closed;
+
+    /**
+     * Constructor.
+     *
+     * @param os Actual output stream.
+     * @param clientLog Client logger.
+     * @param logStreamId Log stream ID.
+     */
+    public IgfsHadoopProxyOutputStream(FSDataOutputStream os, IgfsLogger clientLog, long logStreamId) {
+        assert os != null;
+        assert clientLog != null;
+
+        this.os = os;
+        this.clientLog = clientLog;
+        this.logStreamId = logStreamId;
+
+        lastTs = System.nanoTime();
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void write(int b) throws IOException {
+        writeStart();
+
+        try {
+            os.write(b);
+        }
+        finally {
+            writeEnd();
+        }
+
+        total++;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void write(byte[] b) throws IOException {
+        writeStart();
+
+        try {
+            os.write(b);
+        }
+        finally {
+            writeEnd();
+        }
+
+        total += b.length;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void write(byte[] b, int off, int len) throws IOException {
+        writeStart();
+
+        try {
+            os.write(b, off, len);
+        }
+        finally {
+            writeEnd();
+        }
+
+        total += len;
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void flush() throws IOException {
+        writeStart();
+
+        try {
+            os.flush();
+        }
+        finally {
+            writeEnd();
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override public synchronized void close() throws IOException {
+        if (!closed) {
+            closed = true;
+
+            writeStart();
+
+            try {
+                os.close();
+            }
+            finally {
+                writeEnd();
+            }
+
+            if (clientLog.isLogEnabled())
+                clientLog.logCloseOut(logStreamId, userTime, writeTime, total);
+        }
+    }
+
+    /**
+     * Read start.
+     */
+    private void writeStart() {
+        long now = System.nanoTime();
+
+        userTime += now - lastTs;
+
+        lastTs = now;
+    }
+
+    /**
+     * Read end.
+     */
+    private void writeEnd() {
+        long now = System.nanoTime();
+
+        writeTime += now - lastTs;
+
+        lastTs = now;
+    }
+}

http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/21218e05/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopReader.java
----------------------------------------------------------------------
diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopReader.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopReader.java
new file mode 100644
index 0000000..be429d0
--- /dev/null
+++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/fs/hadoop/IgfsHadoopReader.java
@@ -0,0 +1,104 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.fs.hadoop;
+
+import org.apache.hadoop.fs.*;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.ignite.ignitefs.*;
+import org.apache.ignite.internal.util.typedef.internal.*;
+
+import java.io.*;
+
+/**
+ * Secondary file system input stream wrapper which actually opens input stream only in case it is explicitly
+ * requested.
+ * <p>
+ * The class is expected to be used only from synchronized context and therefore is not tread-safe.
+ */
+public class IgfsHadoopReader implements IgniteFsReader {
+    /** Secondary file system. */
+    private final FileSystem fs;
+
+    /** Path to the file to open. */
+    private final Path path;
+
+    /** Buffer size. */
+    private final int bufSize;
+
+    /** Actual input stream. */
+    private FSDataInputStream in;
+
+    /** Cached error occurred during output stream open. */
+    private IOException err;
+
+    /** Flag indicating that the stream was already opened. */
+    private boolean opened;
+
+    /**
+     * Constructor.
+     *
+     * @param fs Secondary file system.
+     * @param path Path to the file to open.
+     * @param bufSize Buffer size.
+     */
+    IgfsHadoopReader(FileSystem fs, Path path, int bufSize) {
+        assert fs != null;
+        assert path != null;
+
+        this.fs = fs;
+        this.path = path;
+        this.bufSize = bufSize;
+    }
+
+    /** Get input stream. */
+    private PositionedReadable in() throws IOException {
+        if (opened) {
+            if (err != null)
+                throw err;
+        }
+        else {
+            opened = true;
+
+            try {
+                in = fs.open(path, bufSize);
+
+                if (in == null)
+                    throw new IOException("Failed to open input stream (file system returned null): " + path);
+            }
+            catch (IOException e) {
+                err = e;
+
+                throw err;
+            }
+        }
+
+        return in;
+    }
+
+    /**
+     * Close wrapped input stream in case it was previously opened.
+     */
+    @Override public void close() {
+        U.closeQuiet(in);
+    }
+
+    /** {@inheritDoc} */
+    @Override public int read(long pos, byte[] buf, int off, int len) throws IOException {
+        return in().read(pos, buf, off, len);
+    }
+}


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