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From "Francis Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11546) Backport HBASE-11059 to 0.98
Date Fri, 18 Jul 2014 23:02:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14067053#comment-14067053
] 

Francis Liu commented on HBASE-11546:
-------------------------------------

{quote}
Let's take a step back. Why is this change needed in 0.98?
{quote}
Because 0.98 is the latest stable branch. If this enhancement proves itself useful then we
will be running this in production within the next few months.

{quote}
Also, on any minor upgrade e.g. 0.98.4 to 0.98.5, it should be possible to do a rolling restart
from .4 to .5. This change would seems to require two rolling restarts, and on the second
restart the ordering of the master restart will be important.
{quote}
Since this is an opt-in feature then requiring 2 rolling restarts should be okay?

{quote}
Without a backport of HBASE-10569, which I don't think we can backport to a stable branch,
meta updates after this patch is applied in the current state would happen via a remote RPC
call in a synchronized block as per my understanding, which won't be ok.
{quote}
Off-hand I don't see why colocation would be required. We'll take a look if we can come up
with a less invasive solution to avoid the heavy synchronization.





> Backport HBASE-11059 to 0.98
> ----------------------------
>
>                 Key: HBASE-11546
>                 URL: https://issues.apache.org/jira/browse/HBASE-11546
>             Project: HBase
>          Issue Type: Task
>            Reporter: Virag Kothari
>
> Discuss concerns about backporting HBASE-11059 to 0.98



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