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https://issues.apache.org/jira/browse/HBASE-19133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16290723#comment-16290723
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ramkrishna.s.vasudevan commented on HBASE-19133:
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bq.Can we assume that every cell that gets to MemStore is an instance of
ExtendedCell?
Sorry for late response. you can assume it is ExtendedCell and that is why we
added getchunkId there. Just to be safe just add an assertion before you type
cast to ExtendedCell.
> Transfer big cells or upserted/appended cells into MSLAB upon flattening to
> CellChunkMap
> ----------------------------------------------------------------------------------------
>
> Key: HBASE-19133
> URL: https://issues.apache.org/jira/browse/HBASE-19133
> Project: HBase
> Issue Type: Sub-task
> Reporter: Anastasia Braginsky
> Assignee: Gali Sheffi
> Attachments: HBASE-19133.01.patch, HBASE-19133.02.patch,
> HBASE-19133.03.patch, HBASE-19133.04.patch, HBASE-19133.05.patch,
> HBASE-19133.06.patch
>
>
> CellChunkMap Segment index requires all cell data to be written in the MSLAB
> Chunks. Eventhough MSLAB is enabled, cells bigger than chunk size or
> upserted/incremented/appended cells are still allocated on the JVM stack. If
> such cells are found in the process of flattening into CellChunkMap
> (in-memory-flush) they need to be copied into MSLAB.
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