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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8865) Improve quota initialization performance
Date Sat, 08 Aug 2015 02:48:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14662762#comment-14662762
] 

Hadoop QA commented on HDFS-8865:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  26m 11s | Pre-patch trunk compilation is healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any @author tags.
|
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to include 2 new
or modified test files. |
| {color:green}+1{color} | javac |   8m 59s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  10m 20s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 24s | The applied patch does not increase
the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   1m 55s | The applied patch generated  10 new checkstyle
issues (total was 491, now 498). |
| {color:green}+1{color} | whitespace |   0m  1s | The patch has no lines that end in whitespace.
|
| {color:green}+1{color} | install |   1m 28s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 35s | The patch built with eclipse:eclipse.
|
| {color:red}-1{color} | findbugs |   2m 44s | The patch appears to introduce 1 new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m  9s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 175m 32s | Tests failed in hadoop-hdfs. |
| | | 231m 23s | |
\\
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs |
| Failed unit tests | hadoop.hdfs.server.namenode.snapshot.TestSnapshot |
|   | hadoop.hdfs.TestLeaseRecovery2 |
|   | hadoop.hdfs.server.namenode.snapshot.TestRenameWithSnapshots |
| Timed out tests | org.apache.hadoop.cli.TestHDFSCLI |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12749347/HDFS-8865.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 8f73bdd |
| checkstyle |  https://builds.apache.org/job/PreCommit-HDFS-Build/11938/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
|
| Findbugs warnings | https://builds.apache.org/job/PreCommit-HDFS-Build/11938/artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
|
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/11938/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/11938/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed Sep
3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/11938/console |


This message was automatically generated.

> Improve quota initialization performance
> ----------------------------------------
>
>                 Key: HDFS-8865
>                 URL: https://issues.apache.org/jira/browse/HDFS-8865
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>         Attachments: HDFS-8865.patch
>
>
> After replaying edits, the whole file system tree is recursively scanned in order to
initialize the quota. For big name space, this can take a very long time.  Since this is done
during namenode failover, it also affects failover latency.
> By using the Fork-Join framework, I was able to greatly reduce the initialization time.
 The following is the test result using the fsimage from one of the big name nodes we have.
> || threads || seconds||
> | 1 (existing) | 55|
> | 1 (fork-join) | 68 |
> | 4 | 16 |
> | 8 | 8 |
> | 12 | 6 |
> | 16 | 5 |
> | 20 | 4 |



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