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https://issues.apache.org/jira/browse/HBASE-13890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14616225#comment-14616225
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Vladimir Rodionov commented on HBASE-13890:
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[~jmspaggi] wrote:
{quote}
But this will require an extra RPC call.
{quote}
Yes, but very rarely. The point of using memstore_only operation is to achieve
better performance/latency in 99% of calls, when data, with a very high
probability is in a memstore.
{quote}
Is it not possible to have something like MEMSTORE_ONLY_ATTRIBUTE_ELSE_NORMAL
where if you have something in the memstore you return, and if not you do a
"normal" operation without having to go back to the client?
{quote}
Yes, of course, but I think this should be additional hint/attribute of an
operation.
> Get/Scan from MemStore only (Client API)
> ----------------------------------------
>
> Key: HBASE-13890
> URL: https://issues.apache.org/jira/browse/HBASE-13890
> Project: HBase
> Issue Type: New Feature
> Components: API, Client, Scanners
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Attachments: HBASE-13890-v1.patch
>
>
> This is short-circuit read for get/scan when recent data (version) of a cell
> can be found only in MemStore (with very high probability).
> Good examples are: Atomic counters and appends. This feature will allow to
> bypass completely store file scanners and improve performance and latency.
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