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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3246) pRead equivalent for direct read path
Date Tue, 30 Apr 2019 22:11:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16830732#comment-16830732
] 

Hudson commented on HDFS-3246:
------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #16483 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/16483/])
HDFS-3246: pRead equivalent for direct read path (#597) (todd: rev 4877f0aa518832c37a06e6d3bd2c9552fc3141dc)
* (edit) hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/crypto/TestCryptoStreams.java
* (edit) hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs-tests/test_libhdfs_ops.c
* (add) hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ByteBufferPositionedReadable.java
* (edit) hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/crypto/TestCryptoStreamsNormal.java
* (edit) hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/StreamCapabilities.java
* (edit) hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/hdfs.c
* (edit) hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/CryptoInputStream.java
* (edit) hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ByteBufferReadable.java
* (edit) hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/crypto/CryptoStreamsTestBase.java
* (edit) hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
* (edit) hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSDataInputStream.java
* (edit) hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/crypto/TestCryptoStreamsForLocalFS.java
* (add) hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestByteBufferPread.java
* (edit) hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs-tests/hdfs_test.h


> pRead equivalent for direct read path
> -------------------------------------
>
>                 Key: HDFS-3246
>                 URL: https://issues.apache.org/jira/browse/HDFS-3246
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs-client, performance
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Henry Robinson
>            Assignee: Sahil Takiar
>            Priority: Major
>             Fix For: 3.3.0
>
>         Attachments: HDFS-3246.001.patch, HDFS-3246.002.patch, HDFS-3246.003.patch, HDFS-3246.004.patch,
HDFS-3246.005.patch, HDFS-3246.006.patch, HDFS-3246.007.patch
>
>
> There is no pread equivalent in ByteBufferReadable. We should consider adding one. It
would be relatively easy to implement for the distributed case (certainly compared to HDFS-2834),
since DFSInputStream does most of the heavy lifting.



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