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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Hbase Unusable after auto split to 1024 regions
Date Thu, 06 Nov 2014 05:56:58 GMT
IncreasingToUpperBoundRegionSplitPolicy is the default split policy.

You can read the javadoc of this class to see how it works.

Cheers

On Wed, Nov 5, 2014 at 9:39 PM, Ted Yu <yuzhihong@gmail.com> wrote:

> Can you provide a bit more information (such as HBase release) ?
>
> If you pastebin one of the region servers' log, that would help us
> determine the cause.
>
> Cheers
>
>
> On Wed, Nov 5, 2014 at 9:29 PM, Pere Kyle <pere@whisper.sh> wrote:
>
>> Hello,
>>
>> Recently our cluster which has been running fine for 2 weeks split to
>> 1024 regions at 1GB per region, after this split the cluster is unusable.
>> Using the performance benchmark I was getting a little better than 100 w/s,
>> whereas before it was 5000 w/s. There are 15 nodes of m2.2xlarge with 8GB
>> heap reserved for Hbase
>>
>> Any Ideas? I am stumped:
>>
>> Thanks,
>> Pere
>>
>> Here is the current
>> hbase-site.xml
>> <?xml version="1.0"?>
>> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
>> <configuration>
>> <property>
>>     <name>hbase.snapshot.enabled</name>
>>     <value>true</value>
>>   </property>
>>
>> <property><name>fs.hdfs.impl</name><value>emr.hbase.fs.BlockableFileSystem</value></property>
>>
>> <property><name>hbase.regionserver.handler.count</name><value>50</value></property>
>>
>> <property><name>hbase.cluster.distributed</name><value>true</value></property>
>>
>> <property><name>hbase.tmp.dir</name><value>/mnt/var/lib/hbase/tmp-data</value></property>
>>
>> <property><name>hbase.master.wait.for.log.splitting</name><value>true</value></property>
>>
>> <property><name>hbase.hregion.memstore.flush.size</name><value>134217728</value></property>
>>   <property><name>hbase.hregion.max.filesize</name><value>5073741824
>> </value></property>
>>
>> <property><name>zookeeper.session.timeout</name><value>60000</value></property>
>>
>> <property><name>hbase.thrift.maxQueuedRequests</name><value>0</value></property>
>>
>> <property><name>hbase.client.scanner.caching</name><value>1000</value></property>
>>
>> <property><name>hbase.hregion.memstore.block.multiplier</name><value>4</value></property>
>> </configuration>
>>
>> hbase-env.sh
>> # The maximum amount of heap to use, in MB. Default is 1000.
>> export HBASE_HEAPSIZE=8000
>>
>> # Extra Java runtime options.
>> # Below are what we set by default.  May only work with SUN JVM.
>> # For more on why as well as other possible settings,
>> # see http://wiki.apache.org/hadoop/PerformanceTuning
>> export HBASE_OPTS="-XX:+UseConcMarkSweepGC”
>>
>> hbase-env.sh
>
>
>

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