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From "Anastasia Braginsky (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18010) Connect CellChunkMap to be used for flattening in CompactingMemStore
Date Mon, 29 May 2017 10:11:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16028200#comment-16028200
] 

Anastasia Braginsky commented on HBASE-18010:
---------------------------------------------

Thanks [~ramkrishna], I understand that you would like to clean mapping of the chunks no longer
in use. But what do you say about the following scenario:

1. Chunk C was allocated and got ID 5
2. C was reclaimed and removed from mapping, but was returned to pool still holding ID 5
3. C was reused from pool and returned to the user once again
4. Cell residing on C is asked what is its chunk id and 5 is the answer
5. ChunkCreator is asked to translate chunk ID 5, but returns null...

Am I wrong?

> Connect CellChunkMap to be used for flattening in CompactingMemStore
> --------------------------------------------------------------------
>
>                 Key: HBASE-18010
>                 URL: https://issues.apache.org/jira/browse/HBASE-18010
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Anastasia Braginsky
>
> The CellChunkMap helps to create a new type of ImmutableSegment, where the index (CellSet's
delegatee) is going to be CellChunkMap. No big cells or upserted cells are going to be supported
here.



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