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https://issues.apache.org/jira/browse/HBASE-17644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15872026#comment-15872026
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Hudson commented on HBASE-17644:
--------------------------------
FAILURE: Integrated in Jenkins build HBase-Trunk_matrix #2521 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/2521/])
HBASE-17644 Always create ByteBufferCells after copying to MSLAB.
(anoopsamjohn: rev 7763dd6688254d37ad611f5d290db47c83cf93d3)
* (edit)
hbase-common/src/main/java/org/apache/hadoop/hbase/codec/KeyValueCodec.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestTags.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMemStoreChunkPool.java
* (delete)
hbase-common/src/main/java/org/apache/hadoop/hbase/OffheapKeyValue.java
* (edit)
hbase-common/src/main/java/org/apache/hadoop/hbase/util/test/RedundantKVGenerator.java
* (delete) hbase-common/src/main/java/org/apache/hadoop/hbase/OffheapTag.java
* (add) hbase-common/src/main/java/org/apache/hadoop/hbase/ByteBufferTag.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALCellCodecWithCompression.java
* (add)
hbase-common/src/main/java/org/apache/hadoop/hbase/ByteBufferKeyValue.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/protobuf/TestProtobufUtil.java
* (delete)
hbase-common/src/test/java/org/apache/hadoop/hbase/TestOffheapKeyValue.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestDependentColumnFilter.java
* (add)
hbase-common/src/test/java/org/apache/hadoop/hbase/TestByteBufferKeyValue.java
* (edit) hbase-common/src/main/java/org/apache/hadoop/hbase/CellUtil.java
* (edit)
hbase-common/src/main/java/org/apache/hadoop/hbase/codec/KeyValueCodecWithTags.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMemStoreLAB.java
* (edit) hbase-common/src/main/java/org/apache/hadoop/hbase/TagUtil.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestSeekTo.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestScannerFromBucketCache.java
* (edit)
hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/RowIndexSeekerV1.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/SimpleRegionObserver.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/security/visibility/ExpAsStringVisibilityLabelServiceImpl.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALReaderOnSecureWAL.java
* (add)
hbase-common/src/main/java/org/apache/hadoop/hbase/NoTagsByteBufferKeyValue.java
* (edit)
hbase-common/src/test/java/org/apache/hadoop/hbase/io/TestTagCompressionContext.java
> Always create ByteBufferCells after copying to MSLAB
> ----------------------------------------------------
>
> Key: HBASE-17644
> URL: https://issues.apache.org/jira/browse/HBASE-17644
> Project: HBase
> Issue Type: Sub-task
> Components: regionserver
> Affects Versions: 2.0.0
> Reporter: ramkrishna.s.vasudevan
> Assignee: Anoop Sam John
> Fix For: 2.0.0
>
> Attachments: HBASE-17644.patch, HBASE-17644_V2.patch,
> HBASE-17644_V3.patch
>
>
> We create a cell out of the Bytebuffer that is returned by MSLAB. This BB can
> be offheap or onheap type. If MSLAB is full we return onheap byte buffer. So
> the place where we create a cell by copying data to this buffer we either
> create KeyValue or OffheapKV based on the buffer type. So what we saw in
> tests is that since we have a combination of Cells the comparisons that
> happens when adding to memstore happens millions of times and that has an
> impact on the performance of write path. In read path this is not significant
> enougth (though we have plans to just create one type of cells every where in
> Server side).
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