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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9303) Balancer slowly with too many small file blocks
Date Tue, 27 Oct 2015 18:32:27 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14976915#comment-14976915
] 

Hadoop QA commented on HDFS-9303:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch |  19m 11s | Findbugs (version ) appears to be broken on
trunk. |
| {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 1 new
or modified test files. |
| {color:green}+1{color} | javac |  11m 13s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  14m 53s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 33s | The applied patch does not increase
the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   1m 11s | There were no new checkstyle issues. |
| {color:red}-1{color} | whitespace |   0m  0s | The patch has 1  line(s) that end in whitespace.
Use git apply --whitespace=fix. |
| {color:green}+1{color} | install |   2m  9s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 46s | The patch built with eclipse:eclipse.
|
| {color:red}-1{color} | findbugs |   3m 23s | The patch appears to introduce 1 new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | native |   4m 19s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests |  58m  4s | Tests failed in hadoop-hdfs. |
| | | 115m 46s | |
\\
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs |
| Failed unit tests | hadoop.fs.contract.hdfs.TestHDFSContractSetTimes |
|   | hadoop.hdfs.TestWriteReadStripedFile |
|   | hadoop.fs.contract.hdfs.TestHDFSContractSeek |
|   | hadoop.hdfs.server.namenode.ha.TestEditLogTailer |
|   | hadoop.hdfs.TestDistributedFileSystem |
|   | hadoop.hdfs.server.balancer.TestBalancer |
|   | hadoop.fs.TestWebHdfsFileContextMainOperations |
|   | hadoop.fs.viewfs.TestViewFsAtHdfsRoot |
|   | hadoop.hdfs.server.namenode.TestCacheDirectives |
| Timed out tests | org.apache.hadoop.hdfs.TestDFSStripedOutputStreamWithFailure |
|   | org.apache.hadoop.fs.viewfs.TestViewFsFileStatusHdfs |
|   | org.apache.hadoop.hdfs.TestDFSAddressConfig |
|   | org.apache.hadoop.fs.contract.hdfs.TestHDFSContractRename |
|   | org.apache.hadoop.hdfs.TestParallelShortCircuitReadNoChecksum |
|   | org.apache.hadoop.fs.shell.TestHdfsTextCommand |
\\
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12769005/HDFS-9303.002.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / aa09880 |
| whitespace | https://builds.apache.org/job/PreCommit-HDFS-Build/13228/artifact/patchprocess/whitespace.txt
|
| Findbugs warnings | https://builds.apache.org/job/PreCommit-HDFS-Build/13228/artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
|
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/13228/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/13228/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf900.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/13228/console |


This message was automatically generated.

> Balancer slowly with too many small file blocks
> -----------------------------------------------
>
>                 Key: HDFS-9303
>                 URL: https://issues.apache.org/jira/browse/HDFS-9303
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: balancer & mover
>    Affects Versions: 2.7.1
>            Reporter: Lin Yiqun
>            Assignee: Lin Yiqun
>         Attachments: HDFS-9303.001.patch, HDFS-9303.002.patch
>
>
> In the recent hadoop release versions I found that balance operation is always so slowly,
even though I upgrade the version.When I analyse balancer log, I found that in every balance
iteration,it use only 4 to 5 minutes, and is a short time.And The most important is that the
most of being moving blocks is small blocks ,and the size is smaller than 1M.And this is a
main reason of the low effective of balance operation.



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