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From "Anastasia Braginsky (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16438) Create a cell type so that chunk id is embedded in it
Date Mon, 03 Apr 2017 18:44:42 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15953981#comment-15953981

Anastasia Braginsky commented on HBASE-16438:

[~anoop.hbase] and [~ram_krish], 

it looks like we all agree to put the seqID in the data-chunk (not in index) together with
the key, value and etc. This can be done by creating a new type of Cell that doesn't include
seqID as a field.

bq. Am just getting confused here. When you say ChunkCell are you telling the BBChunkCell
in current patch? In current patch there is no extra overhead at all. But if you are talking
about the cell to be moved to CellChunkMap - yes then it will have some overhead in terms
of serialization and not in terms of heap overhead

I am talking about the Cell-representation that is going to be part of CellChunkMap. I am
confused here by myself and don't know what is exactly the name of such cell. But I need a
constant saying how many bytes such a Cell takes...

> Create a cell type so that chunk id is embedded in it
> -----------------------------------------------------
>                 Key: HBASE-16438
>                 URL: https://issues.apache.org/jira/browse/HBASE-16438
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 2.0.0
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>         Attachments: HBASE-16438_1.patch, HBASE-16438_3_ChunkCreatorwrappingChunkPool.patch,
HBASE-16438_4_ChunkCreatorwrappingChunkPool.patch, HBASE-16438_8_ChunkCreatorwrappingChunkPool_withchunkRef.patch,
HBASE-16438_9_ChunkCreatorwrappingChunkPool_withchunkRef.patch, HBASE-16438.patch, MemstoreChunkCell_memstoreChunkCreator_oldversion.patch,
> For CellChunkMap we may need a cell such that the chunk out of which it was created,
the id of the chunk be embedded in it so that when doing flattening we can use the chunk id
as a meta data. More details will follow once the initial tasks are completed. 
> Why we need to embed the chunkid in the Cell is described by [~anastas] in this remark
over in parent issue https://issues.apache.org/jira/browse/HBASE-14921?focusedCommentId=15244119&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15244119

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