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From "Gary Helmling (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14969) Add throughput controller for flush
Date Fri, 18 Mar 2016 21:50:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15202229#comment-15202229
] 

Gary Helmling commented on HBASE-14969:
---------------------------------------

This change switches the default compaction throughput controller to PressureAwareCompactionThroughputController
in 1.3, which limits throughput to an upper bound of 20MB by default, which is a pretty big
change operationally for anyone who was previously running with the default of unlimited compactions.

I think we need a release node identifying this change to the default compaction throughput
controller as part of this issue, and we may want to also re-evaluate if the default lower
and upper bound for PressureAwareCompactionThroughputController are too low.

> Add throughput controller for flush
> -----------------------------------
>
>                 Key: HBASE-14969
>                 URL: https://issues.apache.org/jira/browse/HBASE-14969
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 2.0.0, 1.3.0
>            Reporter: Yu Li
>            Assignee: Yu Li
>             Fix For: 2.0.0, 1.3.0
>
>         Attachments: HBASE-14969-addendum-branch-1.patch, HBASE-14969.branch-1.patch,
HBASE-14969.patch, HBASE-14969_v10.patch, HBASE-14969_v2.patch, HBASE-14969_v3.patch, HBASE-14969_v4.patch,
HBASE-14969_v5.patch, HBASE-14969_v6.patch, HBASE-14969_v9.patch, fd78628_9909808_compat_report.html,
load-nothrottling.log, load-throttling.log
>
>
> 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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