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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6080) Improve NFS gateway performance by making rtmax and wtmax configurable
Date Tue, 11 Mar 2014 23:13:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13931122#comment-13931122
] 

Hadoop QA commented on HDFS-6080:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12633847/HDFS-6080.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:red}-1 findbugs{color}.  The patch appears to introduce 1 new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-common-project/hadoop-nfs
hadoop-hdfs-project/hadoop-hdfs hadoop-hdfs-project/hadoop-hdfs-nfs:

                  org.apache.hadoop.fs.TestHdfsNativeCodeLoader

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/6374//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/6374//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-hdfs-nfs.html
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/6374//console

This message is automatically generated.

> Improve NFS gateway performance by making rtmax and wtmax configurable
> ----------------------------------------------------------------------
>
>                 Key: HDFS-6080
>                 URL: https://issues.apache.org/jira/browse/HDFS-6080
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: nfs, performance
>            Reporter: Abin Shahab
>            Assignee: Abin Shahab
>         Attachments: HDFS-6080.patch, HDFS-6080.patch
>
>
> Right now rtmax and wtmax are hardcoded in RpcProgramNFS3. These dictate the maximum
read and write capacity of the server. Therefore, these affect the read and write performance.
> We ran performance tests with 1mb, 100mb, and 1GB files. We noticed significant performance
decline with the size increase when compared to fuse. We realized that the issue was with
the hardcoded rtmax size(64k). 
> When we increased the rtmax to 1MB, we got a 10x improvement in performance.
> NFS reads:
> +---------------+------------+---------------+---------------+---------------+--------------------+----------------------+
> | File          | Size       | Run 1         | Run 2         | Run 3         | Average
           | Std. Dev.            |
> | testFile100Mb | 104857600  | 23.131158137  | 19.24552955   | 19.793332866  | 20.723340184333335
| 1.7172094782219731   |
> | testFile1Gb   | 1073741824 | 219.108776636 | 201.064032255 | 217.433909843 | 212.53557291133333
| 8.14037175506561     |
> | testFile1Mb   | 1048576    | 0.330546906   | 0.256391808   | 0.28730168    | 0.2914134646666667
| 0.030412987573361663 |
> +---------------+------------+---------------+---------------+---------------+--------------------+----------------------+
> Fuse reads:
> +---------------+------------+-------------+--------------+--------------+--------------------+-----------------------+
> | File          | Size       | Run 1       | Run 2        | Run 3        | Average  
         | Std. Dev.             |
> | testFile100Mb | 104857600  | 2.394459443 | 2.695265191  | 2.50046517   | 2.5300632679999997
| 0.12457410127142007   |
> | testFile1Gb   | 1073741824 | 25.03324924 | 24.155102554 | 24.901525525 | 24.696625772999997
| 0.386672412437576     |
> | testFile1Mb   | 1048576    | 0.271615094 | 0.270835986  | 0.271796438  | 0.2714158393333333
| 0.0004166483951065848 |
> +---------------+------------+-------------+--------------+--------------+--------------------+-----------------------+
> (NFS read after rtmax = 1MB)
> +---------------+------------+--------------+-------------+--------------+---------------------+-----------------+
> | File          | Size       | Run 1        | Run 2       | Run 3        | Average  
          | Std. Dev.            |
> | testFile100Mb | 104857600  | 3.655261869  | 3.438676067 | 3.557464787  | 3.5504675743333336
 | 0.0885591069882058   |
> | testFile1Gb   | 1073741824 | 34.663612417 | 37.32089122 | 37.997718857 | 36.660740831333335
 | 1.4389615098060426   |
> | testFile1Mb   | 1048576    | 0.115602858  | 0.106826253 | 0.125229976  | 0.11588636233333334
| 0.007515962395481867 |
> +---------------+------------+--------------+-------------+--------------+---------------------+-----------------+



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