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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14352) Replication is terribly slow with WAL compression
Date Tue, 01 Sep 2015 11:04:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14725192#comment-14725192
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ramkrishna.s.vasudevan commented on HBASE-14352:
------------------------------------------------

[~abhishek.chouhan]
I would like to know how to interpret the size_of_log_queue.png.  The y axis is the size of
the queue and the time to taken to clear the queue has some difference on or before Aug 25?
 Am i reading it right?

> Replication is terribly slow with WAL compression
> -------------------------------------------------
>
>                 Key: HBASE-14352
>                 URL: https://issues.apache.org/jira/browse/HBASE-14352
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.13
>            Reporter: Abhishek Singh Chouhan
>         Attachments: age_of_last_shipped.png, size_of_log_queue.png
>
>
> For the same load, replication with WAL compression enabled is almost 6x slower than
with compression turned off. Age of last shipped operation is also correspondingly much higher
when compression is turned on. 
> By observing Size of log queue we can see that it is taking too much time for the queue
to clear up.
> Attaching corresponding graphs.



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