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From "Vladimir Rodionov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-14388) Compaction improvements: Avoid flush storms by jittering flush interval and max log files
Date Wed, 21 Oct 2015 01:59:27 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14388?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vladimir Rodionov updated HBASE-14388:
--------------------------------------
    Attachment: HBASE-14388-v1.patch

* Periodic memstore flush changes
New configuration option: *hbase.regionserver.flush.jitter*. Default value: 0.5. This affects
memstore flush interval (*hbase.regionserver.optionalcacheflushinterval*) and maximum changes
per flush (*hbase.regionserver.flush.per.changes*) by randomizing them. After every flush
operation, the new random value is assigned to memstore flush interval and to maximum changes
per flush.

* Maximum WAL files changes
The configuration option *hbase.regionserver.maxlogs* is obsolete. The maximum number of WAL
files is defined now dynamically:
{code}
 maxLogs = HEAP_SIZE * memstoreRatio * 2/ LogRollSize
{code} 


> Compaction improvements: Avoid flush storms by jittering flush interval and max log files

> ------------------------------------------------------------------------------------------
>
>                 Key: HBASE-14388
>                 URL: https://issues.apache.org/jira/browse/HBASE-14388
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>             Fix For: 2.0.0
>
>         Attachments: HBASE-14388-v1.patch
>
>




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