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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14969) Add throughput controller for flush
Date Fri, 15 Jan 2016 04:47:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15101186#comment-15101186
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Ted Yu commented on HBASE-14969:
--------------------------------

For NoLimitThroughputController :
{code}
44	  private volatile boolean stopped;
{code}
Does the field have to be volatile ?
I don't see synchronization around access to the field.
{code}
33	 * <li>In normal case, the max throughput is tune between
{code}
'is tune' -> 'is tuned'


> 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, HBASE-14969_v4.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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