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https://issues.apache.org/jira/browse/HBASE-11425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14493832#comment-14493832
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ramkrishna.s.vasudevan commented on HBASE-11425:
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We will update all the other things as you have said in the doc.
bq.You think it could be different now we have buffer reuse? We could save
making a cellblock?
We can try once again with buffers reuse. But still writing multiple cells
individually to the socket was the time taking factor which was reduced when we
were creating a cell block.
Will come back to the other comments shortly. Thanks [[email protected]].
> Cell/DBB end-to-end on the read-path
> ------------------------------------
>
> Key: HBASE-11425
> URL: https://issues.apache.org/jira/browse/HBASE-11425
> Project: HBase
> Issue Type: Umbrella
> Components: regionserver, Scanners
> Affects Versions: 0.99.0
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Attachments: HBASE-11425-E2E-NotComplete.patch, HBASE-11425.patch,
> Offheap reads in HBase using BBs_V2.pdf, Offheap reads in HBase using
> BBs_final.pdf
>
>
> Umbrella jira to make sure we can have blocks cached in offheap backed cache.
> In the entire read path, we can refer to this offheap buffer and avoid onheap
> copying.
> The high level items I can identify as of now are
> 1. Avoid the array() call on BB in read path.. (This is there in many
> classes. We can handle class by class)
> 2. Support Buffer based getter APIs in cell. In read path we will create a
> new Cell with backed by BB. Will need in CellComparator, Filter (like SCVF),
> CPs etc.
> 3. Avoid KeyValue.ensureKeyValue() calls in read path - This make byte copy.
> 4. Remove all CP hooks (which are already deprecated) which deal with KVs.
> (In read path)
> Will add subtasks under this.
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