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https://issues.apache.org/jira/browse/HDFS-13694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16879435#comment-16879435
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Hudson commented on HDFS-13694:
-------------------------------
FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #16866 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/16866/])
HDFS-13694. Making md5 computing being in parallel with image loading.
(elgoiri: rev 9c907294860a48f0d1676a31bda15795b7a6771a)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormatProtobuf.java
> Making md5 computing being in parallel with image loading
> ---------------------------------------------------------
>
> Key: HDFS-13694
> URL: https://issues.apache.org/jira/browse/HDFS-13694
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: zhouyingchao
> Assignee: Lisheng Sun
> Priority: Major
> Attachments: HDFS-13694-001.patch, HDFS-13694-002.patch,
> HDFS-13694-003.patch, HDFS-13694-004.patch, HDFS-13694-005.patch,
> HDFS-13694-006.patch
>
>
> During namenode image loading, it firstly compute the md5 and then load the
> image. Actually these two steps can be in parallel.
> Test this patch against a fsimage of a 70PB 2.4 cluster (200million files
> and 300million blocks), the image loading time be reduced from 1210 seconds
> to 1105 seconds.So it can reduce up to about 10% of time.
>
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