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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17048) Introduce a helper class to calcuate suitable ByteBuf size when allocating send buffer in FanOutOneBlockAsyncDFSOutputHelper
Date Tue, 08 Nov 2016 12:44:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15647468#comment-15647468
] 

ramkrishna.s.vasudevan commented on HBASE-17048:
------------------------------------------------

Thanks for raising this. I just hard coded to 512 * 1024 bytes. I could see some improvement
in the final latency. Say ~9%. 
the PE latency changed from 1076 secs to 970 secs.
But I need to check if this is consistent. Sorry I forgot to update the findings as got busy
with something else.
Can I take this up JIRA?

> Introduce a helper class to calcuate suitable ByteBuf size when allocating send buffer
in FanOutOneBlockAsyncDFSOutputHelper
> ----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-17048
>                 URL: https://issues.apache.org/jira/browse/HBASE-17048
>             Project: HBase
>          Issue Type: Sub-task
>          Components: wal
>    Affects Versions: 2.0.0
>            Reporter: Duo Zhang
>             Fix For: 2.0.0
>
>
> As [~ram_krish] mentioned in HBASE-17021
> https://issues.apache.org/jira/browse/HBASE-17021?focusedCommentId=15646938&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15646938
> The default ByteBuf size is 256B which is too small.



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