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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13023) Document multiWAL
Date Thu, 12 Feb 2015 16:23:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14318478#comment-14318478
] 

Sean Busbey commented on HBASE-13023:
-------------------------------------

{quote}
MultiWAL allows a RegionServer to write multiple WAL streams in parallel, based upon the number
of write replicas HDFS uses, and increase total throughput during the writes.
{quote}

I'd rephrase as "MultiWAL allows a RegionServer to write multiple WAL streams in parallel,
by using multiple pipelines in the underlying HDFS instance, which increases total throughput
during writes. Note that this parallelization is done by partitioning incoming edits by their
Region. Thus, the current implementation will not help with increasing the throughput to a
single Region."

> Document multiWAL
> -----------------
>
>                 Key: HBASE-13023
>                 URL: https://issues.apache.org/jira/browse/HBASE-13023
>             Project: HBase
>          Issue Type: Bug
>          Components: documentation, wal
>            Reporter: Misty Stanley-Jones
>            Assignee: Misty Stanley-Jones
>             Fix For: 2.0.0
>
>         Attachments: HBASE-13023.patch
>
>




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