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https://issues.apache.org/jira/browse/HDFS-13693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16893805#comment-16893805
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Hadoop QA commented on HDFS-13693:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 12s{color}
| {color:red} https://github.com/apache/hadoop/pull/1040 does not apply to
trunk. Rebase required? Wrong Branch? See
https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| GITHUB PR | https://github.com/apache/hadoop/pull/1040 |
| JIRA Issue | HDFS-13693 |
| Console output |
https://builds.apache.org/job/hadoop-multibranch/job/PR-1040/4/console |
| versions | git=2.7.4 |
| Powered by | Apache Yetus 0.10.0 http://yetus.apache.org |
This message was automatically generated.
> Remove unnecessary search in INodeDirectory.addChild during image loading
> -------------------------------------------------------------------------
>
> Key: HDFS-13693
> URL: https://issues.apache.org/jira/browse/HDFS-13693
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: zhouyingchao
> Assignee: Lisheng Sun
> Priority: Major
> Fix For: 3.3.0
>
> Attachments: HDFS-13693-001.patch, HDFS-13693-002.patch,
> HDFS-13693-003.patch, HDFS-13693-004.patch, HDFS-13693-005.patch
>
>
> In FSImageFormatPBINode.loadINodeDirectorySection, all child INodes are added
> to their parent INode's map one by one. The adding procedure will search a
> position in the parent's map and then insert the child to the position.
> However, during image loading, the search is unnecessary since the insert
> position should always be at the end of the map given the sequence they are
> serialized on disk.
> Test this patch against a fsimage of a 70PB cluster (200million files and
> 300million blocks), the image loading time be reduced from 1210 seconds to
> 1138 seconds.So it can reduce up to about 10% of time.
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