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https://issues.apache.org/jira/browse/HBASE-12282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14188184#comment-14188184
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Anoop Sam John commented on HBASE-12282:
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bq.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?
IMHO just not worry abt DBB/HBB here. Always create a new KV type which
implements new BBBackedBuffer. We have optimization in Comparators etc to
check based on hasArry() and do.
> 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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