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Posted to issues@hbase.apache.org by "Jeffrey Zhong (JIRA)" <ji...@apache.org> on 2014/11/26 22:42:12 UTC
[jira] [Updated] (HBASE-12577) Disable distributed log replay by
default
[ https://issues.apache.org/jira/browse/HBASE-12577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jeffrey Zhong updated HBASE-12577:
----------------------------------
Attachment: HBASE-12567.patch
Submit for QA run. Thanks.
> Disable distributed log replay by default
> -----------------------------------------
>
> Key: HBASE-12577
> URL: https://issues.apache.org/jira/browse/HBASE-12577
> Project: HBase
> Issue Type: Sub-task
> Reporter: Enis Soztutar
> Assignee: Jeffrey Zhong
> Priority: Critical
> Fix For: 0.99.2
>
> Attachments: HBASE-12567.patch
>
>
> Distributed log replay is an awesome feature, but due of HBASE-11094, the rolling upgrade story from 0.98 is hard to explain / enforce.
> The fix for HBASE-11094 only went into 0.98.4, meaning rolling upgrades from 0.98.4- might lose data during the upgrade.
> I feel no matter how much documentation / warning we do, we cannot prevent users from doing rolling upgrades from 0.98.4- to 1.0. And we do not want to inconvenience the user by requiring a two step rolling upgrade.
> Thus I think we should disable dist log replay for 1.0, and re-enable it again for 1.1 (if rolling upgrade from 0.98 is not supported).
> ie. undo: HBASE-10888
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