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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-10434) Store Tag compression information for a WAL in its header
Date Tue, 28 Jan 2014 18:51:37 GMT

     [ https://issues.apache.org/jira/browse/HBASE-10434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Anoop Sam John updated HBASE-10434:

    Status: Patch Available  (was: Open)

> Store Tag compression information for a WAL in its header
> ---------------------------------------------------------
>                 Key: HBASE-10434
>                 URL: https://issues.apache.org/jira/browse/HBASE-10434
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.0
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 0.98.0, 0.99.0
>         Attachments: HBASE-10434.patch
> We can enable/disable tag compression along with WAL compression using the config,
> hbase.regionserver.wal.tags.enablecompression ->  Defaults to true so that compress
tags when WAL compress is ON.
> We are not storing this info abt whether a WAL containing compressed tags or not in the
WAL header and use that in the read path. So dynamic change of this in some servers may cause
issue when  an RS having this value as true have to read and split a WAL generated from n
RS where this value was false.

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