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From "zhangduo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8329) Limit compaction speed
Date Wed, 24 Dec 2014 07:55:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14258087#comment-14258087
] 

zhangduo commented on HBASE-8329:
---------------------------------

add a testcase to test compaction speed locally.
The result is
{noformat}
Test with rowSize = 16 B, size = 358.29 MB, duration = 8802ms, rate = 41682.69917792121KB/sec
Test with rowSize = 4 KB, size = 1.21 GB, duration = 25054ms, rate = 50831.594965811346KB/sec
Test with rowSize = 512 KB, size = 1.25 GB, duration = 32501ms, rate = 40347.30749270215KB/sec
{noformat}

Seems even with a small value size we can still get a 40MB/sec rate...

{code:title=TestCompactionSpeed.java}
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 * 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
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package org.apache.hadoop.hbase.regionserver.compactions;

import java.io.IOException;
import java.util.concurrent.ThreadLocalRandom;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.util.StringUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.google.common.hash.Hashing;

public class TestCompactionSpeed {

  private static final Log LOG = LogFactory.getLog(TestCompactionSpeed.class);

  private HBaseTestingUtility util = new HBaseTestingUtility();

  private byte[] tableName = TableName.valueOf(getClass().getSimpleName(), "test").getName();

  private byte[] family = Bytes.toBytes("f");

  private byte[] qualifier = Bytes.toBytes("q");

  private HRegion region;

  @Before
  public void setUp() throws IOException {
    util.getConfiguration().setLong(HConstants.HREGION_MEMSTORE_FLUSH_SIZE, 1024L * 1024 *
1024);
    util.getConfiguration().setInt(CompactionConfiguration.HBASE_HSTORE_COMPACTION_MIN_KEY,
20);
    util.getConfiguration().setInt(CompactionConfiguration.HBASE_HSTORE_COMPACTION_MAX_KEY,
40);
    region =
        util.createLocalHRegion(tableName, null, null, "", util.getConfiguration(), false,
          Durability.SKIP_WAL, null, family);
  }

  @After
  public void tearDown() throws IOException {
    region.close();
    util.cleanupTestDir();
  }

  private void prepareData(int rowSize, long flushSize, int storeFileCount) throws IOException
{
    long rowCount = 0;
    byte[] value = new byte[rowSize];
    for (int i = 0; i < storeFileCount; i++) {
      while (region.memstoreSize.get() < flushSize) {
        ThreadLocalRandom.current().nextBytes(value);
        Put put =
            new Put(Hashing.murmur3_32().hashLong(rowCount).asBytes())
                .add(family, qualifier, value);
        region.put(put);
        rowCount++;
      }
      region.flushcache(true);
    }
  }

  private void testCompactionSpeed(int rowSize) throws IOException {
    prepareData(rowSize, 128L * 1024 * 1024, 10);
    long size = region.getStore(family).getStorefilesSize();
    long startTime = System.currentTimeMillis();
    region.compactStores(true);
    long duration = System.currentTimeMillis() - startTime;

    LOG.info("Test with rowSize = " + StringUtils.byteDesc(rowSize) + ", size = "
        + StringUtils.byteDesc(size) + ", duration = " + duration + "ms" + ", rate = "
        + ((double) size / duration * 1000 / 1024) + "KB/sec");
  }

  @Test
  public void testSmall() throws IOException {
    testCompactionSpeed(16);
  }

  @Test
  public void testMedium() throws IOException {
    testCompactionSpeed(4 * 1024);
  }

  @Test
  public void testLarge() throws IOException {
    testCompactionSpeed(512 * 1024);
  }
}

{code}

> Limit compaction speed
> ----------------------
>
>                 Key: HBASE-8329
>                 URL: https://issues.apache.org/jira/browse/HBASE-8329
>             Project: HBase
>          Issue Type: Improvement
>          Components: Compaction
>            Reporter: binlijin
>            Assignee: Sergey Shelukhin
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: HBASE-8329-10.patch, HBASE-8329-11.patch, HBASE-8329-12.patch, HBASE-8329-2-trunk.patch,
HBASE-8329-3-trunk.patch, HBASE-8329-4-trunk.patch, HBASE-8329-5-trunk.patch, HBASE-8329-6-trunk.patch,
HBASE-8329-7-trunk.patch, HBASE-8329-8-trunk.patch, HBASE-8329-9-trunk.patch, HBASE-8329-trunk.patch
>
>
> There is no speed or resource limit for compaction´╝îI think we should add this feature
especially when request burst.



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