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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-13109) Verify that max logs parameter wouldn't cause premature region flush
Date Fri, 08 Jan 2016 20:45:39 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-13109?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu updated AMBARI-13109:
----------------------------
    Description: 
For hbase, the following relationship should be maintained:

dfs.blocksize * 0.95 *  hbase.regionserver.maxlogs (default 32) > hbase.regionserver.global.memstore.upperLimit
* HBASE_HEAPSIZE

The rationale is to avoid premature region flush due to log roll which is triggered by insufficiently
high max logs.


When user changes the values for max logs, memstore upper limit or max heap size, we should
verify that the above relationship is satisfied.

  was:
For hbase, the following relationship should be maintained:

dfs.blocksize * 0.95 *  hbase.regionserver.maxlogs (default 32) > hbase.regionserver.global.memstore.upperLimit
* HBASE_HEAPSIZE

The rationale is to avoid premature region flush due to log roll which is triggered by insufficiently
high max logs.

When user changes the values for max logs, memstore upper limit or max heap size, we should
verify that the above relationship is satisfied.


> Verify that max logs parameter wouldn't cause premature region flush
> --------------------------------------------------------------------
>
>                 Key: AMBARI-13109
>                 URL: https://issues.apache.org/jira/browse/AMBARI-13109
>             Project: Ambari
>          Issue Type: Improvement
>            Reporter: Ted Yu
>
> For hbase, the following relationship should be maintained:
> dfs.blocksize * 0.95 *  hbase.regionserver.maxlogs (default 32) > hbase.regionserver.global.memstore.upperLimit
* HBASE_HEAPSIZE
> The rationale is to avoid premature region flush due to log roll which is triggered by
insufficiently high max logs.
> When user changes the values for max logs, memstore upper limit or max heap size, we
should verify that the above relationship is satisfied.



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