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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-9612) Ability to batch edits destined to different regions
Date Sat, 05 Oct 2013 00:12:43 GMT

     [ https://issues.apache.org/jira/browse/HBASE-9612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

stack updated HBASE-9612:

      Resolution: Fixed
    Release Note: Restores being able to send many regions's worth of edits to a regionserver
when running the multi call (previous it was doing a single region's worth at a time).  Required
redo of the multi proto model.  Removed multiGet since it had same problem in that it only
did a region's worth at a time; use the multi call instead to do multiGets.  All should be
transparent to the user but those trying to do clients against hbase will see changes (flags
moved from GetRequest to Get and the above mentioned refactor of the MultiRequest proto).
          Status: Resolved  (was: Patch Available)

> Ability to batch edits destined to different regions
> ----------------------------------------------------
>                 Key: HBASE-9612
>                 URL: https://issues.apache.org/jira/browse/HBASE-9612
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.95.0, 0.95.1, 0.95.2, 0.96.0
>            Reporter: Benoit Sigoure
>            Assignee: stack
>            Priority: Blocker
>             Fix For: 0.98.0, 0.96.0
>         Attachments: 0001-fix-packaging-by-region-in-MultiServerCallable.patch, 9612.096.v5.txt,
9612-nico.v14.096.txt, 9612revert.txt, 9612-v10-nico.patch, 9612v10.txt, 9612-v11-nico.patch,
9612v11.txt, 9612v12.txt, 9612.v13-nico.patch, 9612.v14-nico.patch, 9612v2.txt, 9612v3.txt,
9612v4.txt, 9612v5.txt, 9612v5.txt, 9612v5.txt, 9612v7.txt, 9612v8.096.txt, 9612v8.txt, 9612v9.txt,
9612v9.txt, 9612.wip.txt, broken.patch
> The old (pre-PB) "multi" and "multiPut" RPCs allowed one to batch edits destined to different
regions.  Seems like we've lost this ability after the switch to protobufs.
> The {{MultiRequest}} only contains one {{RegionSpecifier}}, and a list of {{MultiAction}}.
 The {{MultiAction}} message is contains either a single {{MutationProto}} or a {{Get}} (but
not both – so its name is misleading as there is nothing "multi" about it).  Also it seems
redundant with {{MultiGetRequest}}, I'm not sure what's the point of supporting {{Get}} in
> I propose that we change {{MultiRequest}} to be a just a list of {{MultiAction}}, and
{{MultiAction}} will contain the {{RegionSpecifier}}, the {{bool atomic}} and a list of {{MutationProto}}.
 This would be a non-backward compatible protobuf change.
> If we want we can support mixing edits and reads, in which case we'd also add a list
of {{Get}} in {{MultiAction}}, and we'd have support having both that list and the list of
{{MutationProto}} set at the same time.  But this is a bonus and can be done later (in a backward
compatible manner, hence no need to rush on this one).

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