Hadoop Common
  1. Hadoop Common
  2. HADOOP-5861

s3n files are not getting split by default

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.19.1
    • Fix Version/s: 0.21.0
    • Component/s: fs/s3
    • Labels:
      None
    • Environment:

      ec2

    • Hadoop Flags:
      Incompatible change, Reviewed
    • Release Note:
      Files stored on the native S3 filesystem (s3n:// URIs) now report a block size determined by the fs.s3n.block.size property (default 64MB).

      Description

      running with stock ec2 scripts against hadoop-19 - i tried to run a job against a directory with 4 text files - each about 2G in size. These were not split (only 4 mappers were run).

      The reason seems to have two parts - primarily that S3N files report a block size of 5G. This causes FileInputFormat.getSplits to fall back on goal size (which is totalsize/conf.get("mapred.map.tasks")).Goal Size in this case was 4G - hence the files were not split. This is not an issue with other file systems since the block size reported is much smaller and the splits get based on block size (not goal size).

      can we make the S3N files report a more reasonable block size?

      1. hadoop-5861-v2.patch
        4 kB
        Tom White
      2. hadoop-5861.patch
        4 kB
        Tom White

        Activity

        Hide
        Tom White added a comment -

        Here's a patch which makes the default block size 64MB (configured using fs.s3n.block.size). It also fixes HADOOP-5804, which is related.

        Show
        Tom White added a comment - Here's a patch which makes the default block size 64MB (configured using fs.s3n.block.size). It also fixes HADOOP-5804 , which is related.
        Hide
        Joydeep Sen Sarma added a comment -

        looks good to me ..

        Show
        Joydeep Sen Sarma added a comment - looks good to me ..
        Hide
        Hadoop QA added a comment -

        -1 overall. Here are the results of testing the latest attachment
        http://issues.apache.org/jira/secure/attachment/12409188/hadoop-5861.patch
        against trunk revision 780114.

        +1 @author. The patch does not contain any @author tags.

        +1 tests included. The patch appears to include 9 new or modified tests.

        -1 patch. The patch command could not apply the patch.

        Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/428/console

        This message is automatically generated.

        Show
        Hadoop QA added a comment - -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12409188/hadoop-5861.patch against trunk revision 780114. +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 9 new or modified tests. -1 patch. The patch command could not apply the patch. Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/428/console This message is automatically generated.
        Hide
        Tom White added a comment -

        Regenerating patch for trunk.

        Show
        Tom White added a comment - Regenerating patch for trunk.
        Hide
        Hadoop QA added a comment -

        -1 overall. Here are the results of testing the latest attachment
        http://issues.apache.org/jira/secure/attachment/12409550/hadoop-5861-v2.patch
        against trunk revision 780777.

        +1 @author. The patch does not contain any @author tags.

        +1 tests included. The patch appears to include 8 new or modified tests.

        +1 javadoc. The javadoc tool did not generate any warning messages.

        +1 javac. The applied patch does not increase the total number of javac compiler warnings.

        +1 findbugs. The patch does not introduce any new Findbugs warnings.

        +1 Eclipse classpath. The patch retains Eclipse classpath integrity.

        +1 release audit. The applied patch does not increase the total number of release audit warnings.

        +1 core tests. The patch passed core unit tests.

        -1 contrib tests. The patch failed contrib unit tests.

        Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/447/testReport/
        Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/447/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
        Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/447/artifact/trunk/build/test/checkstyle-errors.html
        Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/447/console

        This message is automatically generated.

        Show
        Hadoop QA added a comment - -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12409550/hadoop-5861-v2.patch against trunk revision 780777. +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 8 new or modified tests. +1 javadoc. The javadoc tool did not generate any warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. +1 findbugs. The patch does not introduce any new Findbugs warnings. +1 Eclipse classpath. The patch retains Eclipse classpath integrity. +1 release audit. The applied patch does not increase the total number of release audit warnings. +1 core tests. The patch passed core unit tests. -1 contrib tests. The patch failed contrib unit tests. Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/447/testReport/ Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/447/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/447/artifact/trunk/build/test/checkstyle-errors.html Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/447/console This message is automatically generated.
        Hide
        Tom White added a comment -

        I've just committed this.

        (The contrib test failures were not related.)

        Show
        Tom White added a comment - I've just committed this. (The contrib test failures were not related.)

          People

          • Assignee:
            Tom White
            Reporter:
            Joydeep Sen Sarma
          • Votes:
            0 Vote for this issue
            Watchers:
            4 Start watching this issue

            Dates

            • Created:
              Updated:
              Resolved:

              Development