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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9259) Make SO_SNDBUF size configurable at DFSClient side for hdfs write scenario
Date Sun, 25 Oct 2015 06:04:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14973065#comment-14973065
] 

Hadoop QA commented on HDFS-9259:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch |  22m 42s | Pre-patch trunk has 1 extant Findbugs (version
3.0.0) warnings. |
| {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 |   8m 48s | There were no new javac warning messages. |
| {color:green}+1{color} | javadoc |  11m 15s | There were no new javadoc warning messages.
|
| {color:green}+1{color} | release audit |   0m 25s | The applied patch does not increase
the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   2m 55s | There were no new checkstyle issues. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that end in whitespace.
|
| {color:green}+1{color} | install |   1m 56s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 40s | The patch built with eclipse:eclipse.
|
| {color:green}+1{color} | findbugs |   5m  4s | The patch does not introduce any new Findbugs
(version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m 34s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests |  67m  2s | Tests failed in hadoop-hdfs. |
| {color:green}+1{color} | hdfs tests |   0m 32s | Tests passed in hadoop-hdfs-client. |
| | | 124m 56s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.tools.TestHdfsConfigFields |
|   | hadoop.hdfs.TestRecoverStripedFile |
|   | hadoop.hdfs.server.namenode.TestFileTruncate |
|   | hadoop.hdfs.server.blockmanagement.TestUnderReplicatedBlocks |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12768573/HDFS-9259.000.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 446212a |
| Pre-patch Findbugs warnings | https://builds.apache.org/job/PreCommit-HDFS-Build/13184/artifact/patchprocess/trunkFindbugsWarningshadoop-hdfs.html
|
| hadoop-hdfs test log | https://builds.apache.org/job/PreCommit-HDFS-Build/13184/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| hadoop-hdfs-client test log | https://builds.apache.org/job/PreCommit-HDFS-Build/13184/artifact/patchprocess/testrun_hadoop-hdfs-client.txt
|
| Test Results | https://builds.apache.org/job/PreCommit-HDFS-Build/13184/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf909.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/13184/console |


This message was automatically generated.

> Make SO_SNDBUF size configurable at DFSClient side for hdfs write scenario
> --------------------------------------------------------------------------
>
>                 Key: HDFS-9259
>                 URL: https://issues.apache.org/jira/browse/HDFS-9259
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Ming Ma
>            Assignee: Mingliang Liu
>         Attachments: HDFS-9259.000.patch
>
>
> We recently found that cross-DC hdfs write could be really slow. Further investigation
identified that is due to SendBufferSize and ReceiveBufferSize used for hdfs write. The test
ran "hadoop -fs -copyFromLocal" of a 256MB file across DC with different SendBufferSize and
ReceiveBufferSize values. The results showed that c much faster than b; b is faster than a.
> a. SendBufferSize=128k, ReceiveBufferSize=128k (hdfs default setting).
> b. SendBufferSize=128K, ReceiveBufferSize=not set(TCP auto tuning).
> c. SendBufferSize=not set, ReceiveBufferSize=not set(TCP auto tuning for both)
> HDFS-8829 has enabled scenario b. We would like to enable scenario c by making SendBufferSize
configurable at DFSClient side. Cc: [~cmccabe] [~He Tianyi] [~kanaka] [~vinayrpet].



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