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https://issues.apache.org/jira/browse/HBASE-13890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14616216#comment-14616216
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Vladimir Rodionov commented on HBASE-13890:
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[~anoop.hbase] asked:
{quote}
So if some how the old cell is not there in memstore, the increment op will
result in a wrong result no?
{quote}
No, increment/append will return empty result. Empty result means - operation
from memstore failed, repeat regular one. For counters this will happen very
rarely. Its hard to imagine that a counter is not in a memstore.
> 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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