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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11299) Support multiple Datanode File IO hooks
Date Tue, 10 Jan 2017 19:12:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15815890#comment-15815890
] 

Hudson commented on HDFS-11299:
-------------------------------

FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #11101 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/11101/])
HDFS-11299. Support multiple Datanode File IO hooks. Contributed by (arp: rev 4046794a5365f80f9fa002e3889e41c6d29e13a8)
* (delete) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/CountingFileIoEvents.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* (delete) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/FileIoEvents.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/FileIoProvider.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNodeMXBean.java
* (add) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/FaultInjectorFileIoEvents.java
* (delete) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DefaultFileIoEvents.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeVolumeMetrics.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/tools/TestHdfsConfigFields.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
* (edit) hadoop-common-project/hadoop-common/src/site/markdown/Metrics.md
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/ProfilingFileIoEvents.java


> Support multiple Datanode File IO hooks
> ---------------------------------------
>
>                 Key: HDFS-11299
>                 URL: https://issues.apache.org/jira/browse/HDFS-11299
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs
>            Reporter: Hanisha Koneru
>            Assignee: Hanisha Koneru
>             Fix For: 3.0.0-alpha2
>
>         Attachments: HDFS-11299.000.patch, HDFS-11299.001.patch, HDFS-11299.002.patch
>
>
> HDFS-10958 introduces instrumentation hooks around DataNode disk IO and HDFS-10959 adds
support for profiling hooks to expose latency statistics. 
> Instead of choosing only one hook using Config parameters, we want to add two separate
hooks - one for profiling and one for fault injection. The fault injection hook will be useful
for testing purposes. 
> This jira only introduces support for fault injection hook. The implementation for that
will come later on.
> Also, now Default and Counting FileIOEvents would not be needed as we can control enabling
the profiling and fault injection hooks using config parameters.



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