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Posted to common-issues@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2009/11/02 03:28:59 UTC

[jira] Commented: (HADOOP-6349) Implement FastLZCodec for fastlz/lzo algorithm

    [ https://issues.apache.org/jira/browse/HADOOP-6349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12772405#action_12772405 ] 

Todd Lipcon commented on HADOOP-6349:
-------------------------------------

There seems to be a bug in the code somewhere - I set the count = 100000 in the TestCodec class (and commented out all the other codecs but fastlz) and it now crashes with a heap space error. If I run the test with -Xmx4g, it crashes with an EOFException. The seed -400483164 reproduces this reliably. Another seed that produces a different stack trace is -717812827

We should have a "slow" version of TestCodec which iterates through a few thousand different random seeds and random data lengths to ensure that the codec is robust.

> Implement FastLZCodec for fastlz/lzo algorithm
> ----------------------------------------------
>
>                 Key: HADOOP-6349
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6349
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: io
>            Reporter: William Kinney
>         Attachments: HADOOP-6349.patch, TestCodecPerformance.java, testCodecPerfResults.tsv
>
>
> Per  [HADOOP-4874|http://issues.apache.org/jira/browse/HADOOP-4874], FastLZ is a good (speed, license) alternative to LZO. 

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