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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14457) Umbrella: Improve Multiple WAL for production usage
Date Wed, 13 Jan 2016 04:49:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15095606#comment-15095606
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Yu Li commented on HBASE-14457:
-------------------------------

Oh yes, forgot to mention that in doc. The YCSB version is 0.3.1, and the hbase version in
last test (PCIe SSD) is our 0.98.12 with multiple wal function backported. Use 0.98.12 since
we need a comparison with our online data, JFYI.

> Umbrella: Improve Multiple WAL for production usage
> ---------------------------------------------------
>
>                 Key: HBASE-14457
>                 URL: https://issues.apache.org/jira/browse/HBASE-14457
>             Project: HBase
>          Issue Type: Umbrella
>            Reporter: Yu Li
>            Assignee: Yu Li
>             Fix For: 2.0.0, 1.3.0
>
>         Attachments: Action in Multiple WAL.pdf, Action in Multiple WAL.pdf
>
>
> HBASE-5699 proposed the idea to run with multiple WAL in regionserver and did a great
initial work there, but when trying to use it in our production cluster, we still found several
issues to resolve, like tracking multiple WAL paths in replication (HBASE-6617), fixing UT
with multiwal provider (HBASE-14411), introducing a namespace-based strategy for RegionGroupingProvider
(HBASE-14456), etc. This is an umbrella including(but not limited of) all these works and
efforts to make multiple wal ready for production usage and give user a clear picture about
it.
> Besides the developing works done, I'd also like to share some scenarios and testing/online
data in this JIRA about our usage/performance of multiple wal, to(hopefully) help people better
judge whether to enable multiple wal or not in their own cluster and what they might gain.



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