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From chir...@apache.org
Subject svn commit: r698245 - /activemq/sandbox/kahadb/src/main/java/org/apache/kahadb/util/DiskBenchmark.java
Date Tue, 23 Sep 2008 17:02:21 GMT
Author: chirino
Date: Tue Sep 23 10:02:21 2008
New Revision: 698245

URL: http://svn.apache.org/viewvc?rev=698245&view=rev
Log:
- Checking the amount of disk space used is now much faster and accurate.
- removed ref counting of journal files since that was un-used.
- Fixed NPE that would occur in the BTree when the getFirst/getLast was used and tree depth
was > 1
- We now checkpoint and clean up at two different intervals.  We now checkpoint a much higher
rate so that recover is much faster.
- Made recovery error handling more robust.


Added:
    activemq/sandbox/kahadb/src/main/java/org/apache/kahadb/util/DiskBenchmark.java

Added: activemq/sandbox/kahadb/src/main/java/org/apache/kahadb/util/DiskBenchmark.java
URL: http://svn.apache.org/viewvc/activemq/sandbox/kahadb/src/main/java/org/apache/kahadb/util/DiskBenchmark.java?rev=698245&view=auto
==============================================================================
--- activemq/sandbox/kahadb/src/main/java/org/apache/kahadb/util/DiskBenchmark.java (added)
+++ activemq/sandbox/kahadb/src/main/java/org/apache/kahadb/util/DiskBenchmark.java Tue Sep
23 10:02:21 2008
@@ -0,0 +1,333 @@
+/**
+ * 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.kahadb.util;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import org.apache.activemq.protobuf.compiler.CommandLineSupport;
+
+/**
+ * This class is used to get a benchmark the raw disk performance.
+ */
+public class DiskBenchmark {
+
+    boolean verbose;
+    // reads and writes work with 4k of data at a time.
+    int bs=1024*4; 
+    // Work with 100 meg file.
+    long size=1024*1024*500; 
+    long sampleInterval = 10*1000; 
+    
+    public static void main(String[] args) {
+
+        DiskBenchmark benchmark = new DiskBenchmark();
+        args = CommandLineSupport.setOptions(benchmark, args);
+        ArrayList<String> files = new ArrayList<String>();
+        if (args.length == 0) {
+            files.add("disk-benchmark.dat");
+        } else {
+            files.addAll(Arrays.asList(args));
+        }
+
+        for (String f : files) {
+            try {
+                File file = new File(f);
+                if (file.exists()) {
+                    System.out.println("File " + file + " allready exists, will not benchmark.");
+                } else {
+                    System.out.println("Benchmarking: " + file.getCanonicalPath());
+                    Report report = benchmark.benchmark(file);
+                    file.delete();
+                    System.out.println(report.toString());
+                }
+            } catch (Throwable e) {
+                if (benchmark.verbose) {
+                    System.out.println("ERROR:");
+                    e.printStackTrace(System.out);
+                } else {
+                    System.out.println("ERROR: " + e);
+                }
+            }
+        }
+
+    }
+    
+    public static class Report {
+
+        public int size;
+        
+        public int writes;
+        public long writeDuration;
+        
+        public int syncWrites;
+        public long syncWriteDuration;
+        
+        public int reads;
+        public long readDuration;
+
+        @Override
+        public String toString() {
+            return 
+            "Writes: \n" +
+            "  "+writes+" writes of size "+size+" written in "+(writeDuration/1000.0)+" seconds.\n"+
+            "  "+getWriteRate()+" writes/second.\n"+
+            "  "+getWriteSizeRate()+" megs/second.\n"+
+            "\n"+
+            "Sync Writes: \n" +
+            "  "+syncWrites+" writes of size "+size+" written in "+(syncWriteDuration/1000.0)+"
seconds.\n"+
+            "  "+getSyncWriteRate()+" writes/second.\n"+
+            "  "+getSyncWriteSizeRate()+" megs/second.\n"+
+            "\n"+
+            "Reads: \n" +
+            "  "+reads+" reads of size "+size+" read in "+(readDuration/1000.0)+" seconds.\n"+
+            "  "+getReadRate()+" writes/second.\n"+
+            "  "+getReadSizeRate()+" megs/second.\n"+
+            "\n"+
+            "";
+        }
+
+        private float getWriteSizeRate() {
+            float rc = writes;
+            rc *= size;
+            rc /= (1024*1024); // put it in megs
+            rc /= (writeDuration/1000.0); // get rate. 
+            return rc;
+        }
+
+        private float getWriteRate() {
+            float rc = writes;
+            rc /= (writeDuration/1000.0); // get rate. 
+            return rc;
+        }
+        
+        private float getSyncWriteSizeRate() {
+            float rc = syncWrites;
+            rc *= size;
+            rc /= (1024*1024); // put it in megs
+            rc /= (syncWriteDuration/1000.0); // get rate. 
+            return rc;
+        }
+
+        private float getSyncWriteRate() {
+            float rc = syncWrites;
+            rc /= (syncWriteDuration/1000.0); // get rate. 
+            return rc;
+        }
+        private float getReadSizeRate() {
+            float rc = reads;
+            rc *= size;
+            rc /= (1024*1024); // put it in megs
+            rc /= (readDuration/1000.0); // get rate. 
+            return rc;
+        }
+
+        private float getReadRate() {
+            float rc = reads;
+            rc /= (readDuration/1000.0); // get rate. 
+            return rc;
+        }
+
+        public int getSize() {
+            return size;
+        }
+
+        public void setSize(int size) {
+            this.size = size;
+        }
+
+        public int getWrites() {
+            return writes;
+        }
+
+        public void setWrites(int writes) {
+            this.writes = writes;
+        }
+
+        public long getWriteDuration() {
+            return writeDuration;
+        }
+
+        public void setWriteDuration(long writeDuration) {
+            this.writeDuration = writeDuration;
+        }
+
+        public int getSyncWrites() {
+            return syncWrites;
+        }
+
+        public void setSyncWrites(int syncWrites) {
+            this.syncWrites = syncWrites;
+        }
+
+        public long getSyncWriteDuration() {
+            return syncWriteDuration;
+        }
+
+        public void setSyncWriteDuration(long syncWriteDuration) {
+            this.syncWriteDuration = syncWriteDuration;
+        }
+
+        public int getReads() {
+            return reads;
+        }
+
+        public void setReads(int reads) {
+            this.reads = reads;
+        }
+
+        public long getReadDuration() {
+            return readDuration;
+        }
+
+        public void setReadDuration(long readDuration) {
+            this.readDuration = readDuration;
+        }
+    }
+
+
+    public Report benchmark(File file) throws IOException {
+        Report rc = new Report();
+        
+        // Initialize the block we will be writing to disk.
+        byte []data = new byte[bs];
+        for (int i = 0; i < data.length; i++) {
+            data[i] = (byte)('a'+(i%26));
+        }
+        
+        rc.size = data.length;
+        RandomAccessFile raf = new RandomAccessFile(file, "rw");
+        raf.setLength(size);
+        
+        // Figure out how many writes we can do in the sample interval.
+        long start = System.currentTimeMillis();
+        long now = System.currentTimeMillis();
+        int ioCount=0;
+        while( true ) {
+            if( (now-start)>sampleInterval ) {
+                break;
+            }
+            raf.seek(0);
+            for( long i=0; i+data.length < size; i+=data.length) {
+                raf.write(data);
+                ioCount++;
+                now = System.currentTimeMillis();
+                if( (now-start)>sampleInterval ) {
+                    break;
+                }
+            }
+        }
+        raf.close();
+        
+        rc.size = data.length;
+        rc.writes = ioCount;
+        rc.writeDuration = (now-start);
+
+        raf = new RandomAccessFile(file, "rw");
+        start = System.currentTimeMillis();
+        now = System.currentTimeMillis();
+        ioCount=0;
+        while( true ) {
+            if( (now-start)>sampleInterval ) {
+                break;
+            }
+            for( long i=0; i+data.length < size; i+=data.length) {
+                raf.seek(i);
+                raf.write(data);
+                raf.getFD().sync();
+                ioCount++;
+                now = System.currentTimeMillis();
+                if( (now-start)>sampleInterval ) {
+                    break;
+                }
+            }
+        }
+        raf.close();
+        rc.syncWrites = ioCount;
+        rc.syncWriteDuration = (now-start);
+
+        raf = new RandomAccessFile(file, "rw");
+        start = System.currentTimeMillis();
+        now = System.currentTimeMillis();
+        ioCount=0;
+        while( true ) {
+            if( (now-start)>sampleInterval ) {
+                break;
+            }
+            raf.seek(0);
+            for( long i=0; i+data.length < size; i+=data.length) {
+                raf.seek(i);
+                raf.readFully(data);
+                ioCount++;
+                now = System.currentTimeMillis();
+                if( (now-start)>sampleInterval ) {
+                    break;
+                }
+            }
+        }
+        raf.close();
+        
+        rc.reads = ioCount;
+        rc.readDuration = (now-start);
+        return rc;
+    }
+
+
+    public boolean isVerbose() {
+        return verbose;
+    }
+
+
+    public void setVerbose(boolean verbose) {
+        this.verbose = verbose;
+    }
+
+
+    public int getBs() {
+        return bs;
+    }
+
+
+    public void setBs(int bs) {
+        this.bs = bs;
+    }
+
+
+    public long getSize() {
+        return size;
+    }
+
+
+    public void setSize(long size) {
+        this.size = size;
+    }
+
+
+    public long getSampleInterval() {
+        return sampleInterval;
+    }
+
+
+    public void setSampleInterval(long sampleInterval) {
+        this.sampleInterval = sampleInterval;
+    }
+
+}



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