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https://issues.apache.org/jira/browse/HBASE-7639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13735190#comment-13735190
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Lars Hofhansl commented on HBASE-7639:
--------------------------------------
It's 172k of mostly new code, right? Agree it's risky. Still at least for us
that would be incredibly useful (we're doing a lot of coprocessor stuff with
Phoenix, and each time we upgrade the Phoenix coprocessor we need to restart
the cluster at least with a rolling restart). It would be much nicer if we
could just online-update the tables.
I'll make a patch - if I get time - and put it up. Then we can decide on the
risk. It's likely that while I make the patch I'll find it too risky anyway.
> Enable online schema update by default
> ---------------------------------------
>
> Key: HBASE-7639
> URL: https://issues.apache.org/jira/browse/HBASE-7639
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.95.2
> Reporter: Enis Soztutar
> Assignee: Elliott Clark
> Fix For: 0.98.0, 0.95.2
>
> Attachments: HBASE-7639-0.patch
>
>
> After we get HBASE-7305 and HBASE-7546, things will become stable enough to
> enable online schema update to be enabled by default.
> {code}
> <property>
> <name>hbase.online.schema.update.enable</name>
> <value>false</value>
> <description>
> Set true to enable online schema changes. This is an experimental
> feature.ยทยท
> There are known issues modifying table schemas at the same time a region
> split is happening so your table needs to be quiescent or else you have to
> be running with splits disabled.
> </description>
> </property>
> {code}
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