[jira] Commented: (HBASE-2706) Use heuristics to adjust various parameters based on load characteristics

["stack (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-2706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12905241#action_12905241 ] 

stack commented on HBASE-2706:
------------------------------

Another to adjust is sizes of caches.

> Use heuristics to adjust various parameters based on load characteristics
> -------------------------------------------------------------------------
>
>                 Key: HBASE-2706
>                 URL: https://issues.apache.org/jira/browse/HBASE-2706
>             Project: HBase
>          Issue Type: New Feature
>          Components: master
>    Affects Versions: 0.20.4
>            Reporter: Ted Yu
>             Fix For: 0.90.0
>
>
> Refer to 'ideas to improve throughput of the base writing' discussion on hbase user mailing list.
> We should use heuristics to adjust various parameters based on load characteristics. Factors include, but not limited to, number of CPU (cores) on each node, amount of physical memory on each node, Heap space allocated to master/region servers.
> HBase parameters shown below would be dynamic whose current values can be seen on master.jsp / regionserver.jsp
> For JVM parameters such as -Xmx, master.jsp should display recommended value to user.
> -------------
> Thanks. I will make this change:
> <property>
>  <name>hbase.hregion.memstore.block.multiplier</name>
>  <value>8</value>
> </property>
> <property>
>  <name>hbase.regionserver.msginterval</name>
>  <value>10000</value>
> </property>
>  <property>
>   <name>hbase.hstore.compactionThreshold</name>
>   <value>6</value>
> </property>
> <property>
>  <name>hbase.hstore.blockingStoreFiles</name>
>  <value>18</value>
> </property>
> and see how it goes.
> Jimmy.
> With the above change, the write goes faster if it works, but now we have problem that the
> insertion doesn't work at all, here is the result:
> 2010-06-09 22:29:04,330 WARN org.apache.hadoop.hdfs.DFSClient: DFS Read: java.io
> .IOException: Could not find target position 0

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