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Date: Thu, 16 Mar 2017 05:30:41 +0000 (UTC)
From: "ramkrishna.s.vasudevan (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-16438) Create a cell type so that chunk
 id is embedded in it
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archived-at: Thu, 16 Mar 2017 05:30:46 -0000


    [ https://issues.apache.org/jira/browse/HBASE-16438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15927525#comment-15927525 ] 

ramkrishna.s.vasudevan commented on HBASE-16438:
------------------------------------------------

bq.I'll continue with the Allocator/Creator and all the rest... What do you think?
Oh I see. I already did some work here to impl as per your suggestion. If you want to continue I can reduce the scope of this patch.
I think lock unlock is needed along with CAS for the curChunk thing. And also if you see the other threds who is waiting for the curChunk though may get it but has to wait for the alloc to happen and then only it will succeed. I think so overall the same will happen here but only thing is the lock/unlock way may have some internal implication. 

> 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.patch, MemstoreChunkCell_memstoreChunkCreator_oldversion.patch, MemstoreChunkCell_trunk.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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