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From jackylk <>
Subject [GitHub] incubator-carbondata pull request #620: [CARBONDATA-742]Added batch sort to ...
Date Sun, 05 Mar 2017 16:10:37 GMT
Github user jackylk commented on a diff in the pull request:
    --- Diff: processing/src/main/java/org/apache/carbondata/processing/newflow/sort/impl/
    @@ -0,0 +1,270 @@
    + * 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
    + *
    + *
    + *
    + * 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.carbondata.processing.newflow.sort.impl;
    +import java.util.Iterator;
    +import java.util.List;
    +import java.util.concurrent.BlockingQueue;
    +import java.util.concurrent.Callable;
    +import java.util.concurrent.ExecutorService;
    +import java.util.concurrent.Executors;
    +import java.util.concurrent.LinkedBlockingQueue;
    +import java.util.concurrent.TimeUnit;
    +import java.util.concurrent.atomic.AtomicInteger;
    +import java.util.concurrent.atomic.AtomicLong;
    +import org.apache.carbondata.common.CarbonIterator;
    +import org.apache.carbondata.common.logging.LogService;
    +import org.apache.carbondata.common.logging.LogServiceFactory;
    +import org.apache.carbondata.core.util.CarbonProperties;
    +import org.apache.carbondata.core.util.CarbonTimeStatisticsFactory;
    +import org.apache.carbondata.processing.newflow.exception.CarbonDataLoadingException;
    +import org.apache.carbondata.processing.newflow.row.CarbonRow;
    +import org.apache.carbondata.processing.newflow.row.CarbonRowBatch;
    +import org.apache.carbondata.processing.newflow.row.CarbonSortBatch;
    +import org.apache.carbondata.processing.newflow.sort.Sorter;
    +import org.apache.carbondata.processing.newflow.sort.unsafe.UnsafeCarbonRowPage;
    +import org.apache.carbondata.processing.newflow.sort.unsafe.UnsafeSortDataRows;
    +import org.apache.carbondata.processing.newflow.sort.unsafe.merger.UnsafeIntermediateMerger;
    +import org.apache.carbondata.processing.newflow.sort.unsafe.merger.UnsafeSingleThreadFinalSortFilesMerger;
    +import org.apache.carbondata.processing.sortandgroupby.exception.CarbonSortKeyAndGroupByException;
    +import org.apache.carbondata.processing.sortandgroupby.sortdata.SortParameters;
    + * It parallely reads data from array of iterates and do merge sort.
    + * It sorts data in batches and send to the next step.
    + */
    +public class UnsafeBatchParallelReadMergeSorterImpl implements Sorter {
    --- End diff --
    Is this sorter still doing merge? I though it should do in-memory sort only

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