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https://issues.apache.org/jira/browse/HDDS-372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16813131#comment-16813131
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Hudson commented on HDDS-372:
-----------------------------
FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #16365 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/16365/])
HDDS-372. There are three buffer copies in BlockOutputStream. (shashikant: rev
2d4f6b6daa311ec2f1e2ab21310d6f7e29535a7b)
* (edit)
hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/OzoneConfigKeys.java
* (edit)
hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/common/Checksum.java
* (edit)
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/KeyValueHandler.java
* (edit)
hadoop-ozone/client/src/main/java/org/apache/hadoop/ozone/client/rpc/RpcClient.java
* (add)
hadoop-ozone/tools/src/test/java/org/apache/hadoop/ozone/freon/TestDataValidateWithUnsafeByteOperations.java
* (add)
hadoop-ozone/tools/src/test/java/org/apache/hadoop/ozone/freon/TestDataValidateWithSafeByteOperations.java
* (edit)
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/helpers/ChunkUtils.java
* (edit)
hadoop-ozone/tools/src/test/java/org/apache/hadoop/ozone/freon/TestDataValidate.java
* (edit) hadoop-hdds/common/src/main/resources/ozone-default.xml
* (edit)
hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/storage/ContainerProtocolCalls.java
* (edit)
hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/storage/BlockOutputStream.java
* (add)
hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/ByteStringHelper.java
* (edit)
hadoop-ozone/objectstore-service/src/main/java/org/apache/hadoop/ozone/web/storage/DistributedStorageHandler.java
> There are three buffer copies in BlockOutputStream
> --------------------------------------------------
>
> Key: HDDS-372
> URL: https://issues.apache.org/jira/browse/HDDS-372
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Components: Ozone Client
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Shashikant Banerjee
> Priority: Major
> Fix For: 0.5.0
>
> Attachments: HDDS-372.001.patch, HDDS-372.002.patch,
> HDDS-372.003.patch, HDDS-372.004.patch, HDDS-372.005.patch,
> HDDS-372.20180829.patch
>
>
> Currently, there are three buffer copies in ChunkOutputStream
> # from byte[] to ByteBuffer, and
> # from ByteBuffer to ByteString.
> # from ByteString to ByteBuffer for checskum computation
> We should eliminate the ByteBuffer in the middle.
> For zero copy io, we should support WritableByteChannel instead of
> OutputStream. It won't be done in this JIRA.
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