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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12282) Ensure Cells and its implementations work with Buffers also
Date Wed, 29 Oct 2014 09:39:34 GMT

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ramkrishna.s.vasudevan commented on HBASE-12282:
------------------------------------------------

bq.In comparators, based on hasArray() use getxxxArray() or getxxxBuffer()
Yes true. This I agree.
So how should the cell be created?  So based on the buffer from the HFileBlock we wil decide
if it is a direct BB or on heap BB and create KV based on that ? That KV is either a normal
KV that we use now (create cell based on buffer.array) or it would be a new KV which will
have buffer in it?


> Ensure Cells and its implementations work with Buffers also
> -----------------------------------------------------------
>
>                 Key: HBASE-12282
>                 URL: https://issues.apache.org/jira/browse/HBASE-12282
>             Project: HBase
>          Issue Type: Sub-task
>          Components: regionserver, Scanners
>    Affects Versions: 0.99.1
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 2.0.0, 0.99.2
>
>         Attachments: HBASE-12224_2.patch
>
>
> This issue can be used to brainstorm and then do the necessary changes for the offheap
work.  All impl of cells deal with byte[] but when we change the Hfileblocks/Readers to work
purely with Buffers then the byte[] usage would mean that always the data is copied to the
onheap.  Cell may need some interface change to implement this.



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