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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14969) Add throughput controller for flush
Date Fri, 15 Jan 2016 03:25:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15101141#comment-15101141
] 

Yu Li commented on HBASE-14969:
-------------------------------

Checking the findbugs warning, none is introduced by the patch here.

For the two "Increment of volatile field" warnings in HRegion, since the increment is inside
a synchronized block, it's not a problem.

For the "Result of integer multiplication cast to long" one, have opened HBASE-15117 to resolve
it.

> Add throughput controller for flush
> -----------------------------------
>
>                 Key: HBASE-14969
>                 URL: https://issues.apache.org/jira/browse/HBASE-14969
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Yu Li
>            Assignee: Yu Li
>             Fix For: 2.0.0, 1.3.0
>
>         Attachments: HBASE-14969.patch, HBASE-14969_v2.patch, HBASE-14969_v3.patch
>
>
> In HBASE-8329 we added a throughput controller for compaction, to avoid spike caused
by huge IO pressure like network/disk overflow. However, even with this control on, we are
still observing disk utils near 100%, and by analysis we think this is caused by flush, especially
when we increase the setting of {{hbase.hstore.flusher.count}}
> In this JIRA, we propose to add throughput control feature for flush, as a supplement
of HBASE-8329 to better control IO pressure.



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