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https://issues.apache.org/jira/browse/HBASE-14921?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ramkrishna.s.vasudevan updated HBASE-14921:
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Attachment: MemstoreItrCountissue.patch
Attaching a simple UT. I have added two test cases. One where we do in memory
flush and then do a memstore scan. Here we get the exact count.
Next is with MemstoreITerator we do a count. (As it is in MemstoreCompactor).
Here the count is much lesser and exposes the bug.
Note that even in the case where we do scan the flushInMemory does a compaction
which ideally should have been avoided if the count had worked correctly.
> Memory optimizations
> --------------------
>
> Key: HBASE-14921
> URL: https://issues.apache.org/jira/browse/HBASE-14921
> Project: HBase
> Issue Type: Sub-task
> Affects Versions: 2.0.0
> Reporter: Eshcar Hillel
> Assignee: Anastasia Braginsky
> Attachments: CellBlocksSegmentInMemStore.pdf,
> CellBlocksSegmentinthecontextofMemStore(1).pdf, HBASE-14921-V01.patch,
> HBASE-14921-V02.patch, HBASE-14921-V03.patch, HBASE-14921-V04-CA-V02.patch,
> HBASE-14921-V04-CA.patch, HBASE-14921-V05-CAO.patch,
> HBASE-14921-V06-CAO.patch, InitialCellArrayMapEvaluation.pdf,
> IntroductiontoNewFlatandCompactMemStore.pdf, MemstoreItrCountissue.patch,
> NewCompactingMemStoreFlow.pptx
>
>
> Memory optimizations including compressed format representation and offheap
> allocations
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