bakcode/hbase/hbase-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!--
/**
 * Copyright 2010 The Apache Software Foundation
 *
 * 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.
 */
-->
<configuration>
  <property>
    <name>hbase.rootdir</name>
    <value>hdfs://nowledgedata-n7:9000/hbase</value> 
  </property>
  
  <property>
    <name>hbase.regionserver.dns.nameserver</name>
    <value>nowledgedata-n7</value>
  </property>

  <!--
  <property>
    <name>hbase.regionserver.info.bindAddress</name>
    <value>192.168.1.35</value>
  </property>
  -->
  
  <property>
    <name>hbase.tmp.dir</name>
    <value>/disk2/data/hbase/tmp</value>
  </property>  

  <property>
    <name>hbase.cluster.distributed</name>
    <value>true</value>
  </property>

  <property>  
    <name>hbase.master</name>  
    <value>nowledgedata-n7:60000</value>   
  </property>
    
  <property>  
    <name>hbase.zookeeper.quorum</name>  
    <value>nowledgedata-n7</value> 
  </property> 
    
  <property>
    <name>hbase.zookeeper.property.clientPort</name>
    <value>2181</value>
  </property>

  <property>
    <name>hbase.coprocessor.region.classes</name>
    <value>org.apache.hadoop.hbase.coprocessor.AggregateImplementation,com.sdyc.ndschedule.hbase.coprocessor.RowCountCoprocessor</value>
  </property>

<!-- 
  <property>
    <name>hbase.coprocessor.master.classes</name>
    <value>coprocessor.MasterObserverExample</value>
  </property>
  <property>
    <name>hbase.coprocessor.wal.classes</name>
    <value>coprocessor.WALObserverExample, bar.foo.MyWALObserver</value>
  </property>
  -->
  
  
  <property>
    <name>zookeeper.session.timeout</name>
    <value>180000</value>
    <description>ZooKeeper Session的超时时间，调低该值可以让ZooKeeper更快的发现RegionServer的掉线。 默认为180000.</description>
  </property>
  
  <property>
    <name>hbase.master.maxclockskew</name>
    <value>180000</value>
    <description>节点机的时间和master的时间差距大于30000ms，就是30秒时无法启动服务。修改各结点时间，使其误差在30s内</description>
  </property>
  
  <property>
    <name>hbase.master.meta.thread.rescanfrequency</name>
    <value>10000</value>
    <description>How long the HMaster sleeps (in milliseconds) between scans of the root and meta tables.</description>
  </property>
  
  <property>
    <name>hbase.server.thread.wakefrequency</name>
    <value>10000</value>
    <description>Time to sleep in between searches for work (in milliseconds).Used as sleep interval by service threads such as META scanner and log roller.
    </description>
  </property>

  <!--
      下面的是一些优化的配置 
  -->
  <property>
    <name>hbase.regionserver.handler.count</name>
    <value>10</value>
    <description>RegionServer控制RPC程序的线程数。如果RegionServer内存较大，可适量调高该值。 默认为10.</description>
  </property>
  
  <property>
    <name>hbase.hregion.majorcompaction</name>
    <value>86400000</value>
    <description>一个区域中所有主合并之间的间隔。当设置为0时禁用自动的主合并。主合并会消耗大量IO，重负载的HBase应该禁止自动合并。默认为86400000毫秒， 即一天时间一次.
    </description>
  </property>
  
  <property>
    <name>hbase.hregion.memstore.flush.size</name>
    <value>134217728</value>
    <description>写入数据时，内存到达该值后一次性写入磁盘。 默认为128M.</description>
  </property>

  <property>
    <name>hbase.hregion.max.filesize</name>
    <value>1258291200</value>
    <description>HRegion上每个分区的大小。如果无线的增大该值，会导致Region停止分割。这个也是关闭自动分割的办法。 默认为1G.</description>
  </property>
  
  <property>
    <name>hbase.hregion.memstore.block.multiplier</name>
    <value>2</value>
    <description>某区域的MemStore的大小到达一定阈值时， HBase会对更新阻塞。该值为hbase.hregion.memstore.flush.size × hbase.hregion.memstore.block.multiplier，也就是默认在256M会发生阻塞，在写密集情况下可以提高该值。默认为2.
    </description>
  </property>
  
  <property>
    <name>ipc.server.tcpnodelay</name>
    <value>false</value>
    <description>true时禁止延迟， 即关闭使用缓冲区。 默认为false.</description>
  </property>

  <property>
    <name>ipc.client.tcpnodelay</name>
    <value>false</value>
    <description>true时禁止延迟， 即关闭使用缓冲区。 默认为false.</description>
  </property>

  <property>
    <name>ipc.ping.interval</name>
    <value>60000</value>
    <description>ipc ping 频率. 默一分钟。</description>
  </property>

  <property>
    <name>hfile.block.cache.size</name>
    <value>0.25</value>
    <description>RegionServer堆空间最大值的多少百分比分配给块缓存，默认25%</description>
  </property>
  
  <property>
    <name>hbase.client.scanner.caching</name>
    <value>100</value>
    <description>HBase对Scanner扫描缓存的数据行，在调用扫描类的next()方法时能读取到更多的行。默认为1</description>
  </property>
  
  <property>
    <name>hbase.regionserver.global.memstore.upperLimit</name>
    <value>0.4</value>
    <description>RegionServer中所有MemStore的总大小，使用超过该百分比后写操作会阻塞，并且强制写磁盘，直到占用率低于hbase.regionserver.global.memstore.lowerLimit。默认为0.4
    </description>
  </property>
  
  <property>
    <name>hbase.regionserver.global.memstore.lowerLimit</name>
    <value>0.35</value>
    <description>强制写磁盘后直到MemStore占用低于该百分比后停止。默认为0.35</description>
  </property>
  
  <property>
    <name>hbase.hstore.blockingStoreFiles</name>
    <value>7</value>
    <description>这个storefile就是每次memstore flush造成的，flush一次就多一个storefile，所以一个HStore里面会有多个storefile（其实就是hfile）。当StoreFile超过hbase.hstore.blockingStoreFiles的定义就会发生阻塞并且写磁盘。默认为7
    </description>
  </property>
  
  
  
</configuration>