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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11425) Cell/DBB end-to-end on the read-path
Date Thu, 06 Aug 2015 15:08:06 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660142#comment-14660142
] 

Hudson commented on HBASE-11425:
--------------------------------

FAILURE: Integrated in HBase-TRUNK #6701 (See [https://builds.apache.org/job/HBase-TRUNK/6701/])
HBASE-14188 - Read path optimizations after HBASE-11425 profiling (Ram) (ramkrishna: rev 7a9e10dc11877420c53245c403897d746bebc077)
* hbase-common/src/main/java/org/apache/hadoop/hbase/OffheapKeyValue.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
* hbase-common/src/test/java/org/apache/hadoop/hbase/TestOffheapKeyValue.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/filter/FilterAllFilter.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/SizeCachedNoTagsKeyValue.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/SizeCachedKeyValue.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/nio/MultiByteBuff.java


> 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: BenchmarkTestCode.zip, Benchmarks_Tests.docx, 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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