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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15131) Turn on multi-WAL by default
Date Wed, 19 Apr 2017 04:15:42 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15974038#comment-15974038
] 

Yu Li commented on HBASE-15131:
-------------------------------

I think they are two different dimensions: singleWAL v.s. multiWAL, and syncWAL v.s. asyncWAL.
We have been living with syncWAL and multiWAL online for over two years and it proves to be
stable, also some performance number (both benchmark and online) in HBASE-14457.

And yes, would be better with asyncWAL, but no dependency between these two I guess? (smile)

> Turn on multi-WAL by default
> ----------------------------
>
>                 Key: HBASE-15131
>                 URL: https://issues.apache.org/jira/browse/HBASE-15131
>             Project: HBase
>          Issue Type: New Feature
>          Components: wal
>            Reporter: Enis Soztutar
>             Fix For: 2.0.0
>
>
> Something to discuss for 2.0 or even 1.3 or 1.4. Should we turn on multi-WAL by default
now that it has seen some production use. 
> Most of the known issues has been fixed I believe for replication, metrics etc. See HBASE-14457.

> Using bounded provider with default 4 (assuming 12 disks). Should we also look at the
number of disks from datanode dirs and auto-configure? 



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