Benoit Sigoure created HBASE-9612:
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Summary: 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: 0.95.2, 0.95.1, 0.95.0, 0.96.0
Reporter: Benoit Sigoure
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
{{MultiAction}}.
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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