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From "zhangduo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10201) Port 'Make flush decisions per column family' to trunk
Date Sat, 06 Dec 2014 06:36:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14236647#comment-14236647
] 

zhangduo commented on HBASE-10201:
----------------------------------

{quote}
I see less compactions and less hfiles (so less i/o), memstores carrying more (its hard to
see but you should be able to make out memstore sizes do not go to zero or near zero when
the patch is enabled)
{quote}
Glad to see it does help:). Thanks~

> Port 'Make flush decisions per column family' to trunk
> ------------------------------------------------------
>
>                 Key: HBASE-10201
>                 URL: https://issues.apache.org/jira/browse/HBASE-10201
>             Project: HBase
>          Issue Type: Improvement
>          Components: wal
>            Reporter: Ted Yu
>            Assignee: zhangduo
>            Priority: Critical
>             Fix For: 1.0.0, 2.0.0, 0.98.9
>
>         Attachments: 3149-trunk-v1.txt, HBASE-10201-0.98.patch, HBASE-10201-0.98_1.patch,
HBASE-10201-0.98_2.patch, HBASE-10201-0.99.patch, HBASE-10201.patch, HBASE-10201_1.patch,
HBASE-10201_10.patch, HBASE-10201_11.patch, HBASE-10201_12.patch, HBASE-10201_13.patch, HBASE-10201_13.patch,
HBASE-10201_14.patch, HBASE-10201_2.patch, HBASE-10201_3.patch, HBASE-10201_4.patch, HBASE-10201_5.patch,
HBASE-10201_6.patch, HBASE-10201_7.patch, HBASE-10201_8.patch, HBASE-10201_9.patch, compactions.png,
count.png, io.png, memstore.png
>
>
> Currently the flush decision is made using the aggregate size of all column families.
When large and small column families co-exist, this causes many small flushes of the smaller
CF. We need to make per-CF flush decisions.



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