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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-2616) [Gridmix] InputStriper should smartly switch between compressed and uncompressed files based on the simulated job's input data characteristics
Date Thu, 23 Jun 2011 06:31:47 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amar Kamat updated MAPREDUCE-2616:
----------------------------------

    Description: 
Currently, all the Gridmix input data files are located at <gridmix-io-dir>/input (<gridmix-io-dir>
is expected as a CLI parameter). When compression emulation is enabled, Gridmix will check
for compressed files (based on suffixes) in the input folder. Gridmix will bail out if there
are no compressed input files. If the input folder consists of a mix of compressed and uncompressed
input files, then Gridmix will only use compressed input files for all the jobs. Gridmix should
smartly assign 
1. uncompressed input files for jobs the don't need input decompression 
2. compressed input files for jobs that need input decompression 

  was:Currently, all the Gridmix input data files are located at <gridmix-io-dir>/input
(<gridmix-io-dir> is expected as a CLI parameter). When compression emulation is enabled,
Gridmix will check for compressed files (based on suffixes) in the input folder. Gridmix will
bail out if there are no compressed input files. If the input folder consists of a mix of
compressed and uncompressed input files, then Gridmix might end up using uncompressed files
resulting into no emulation.

       Priority: Minor  (was: Major)
     Issue Type: Improvement  (was: Bug)
        Summary: [Gridmix] InputStriper should smartly switch between compressed and uncompressed
files based on the simulated job's input data characteristics  (was: [Gridmix] Input data
compression emulation might not work as expected with data reuse)

MAPREDUCE-2408 modified {{InputStriper}} to take care of the previously reported issue. This
is just an optimization.

> [Gridmix] InputStriper should smartly switch between compressed and uncompressed files
based on the simulated job's input data characteristics
> ----------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2616
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2616
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/gridmix
>    Affects Versions: 0.23.0
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>            Priority: Minor
>              Labels: compression-emulation, gridmix
>             Fix For: 0.23.0
>
>
> Currently, all the Gridmix input data files are located at <gridmix-io-dir>/input
(<gridmix-io-dir> is expected as a CLI parameter). When compression emulation is enabled,
Gridmix will check for compressed files (based on suffixes) in the input folder. Gridmix will
bail out if there are no compressed input files. If the input folder consists of a mix of
compressed and uncompressed input files, then Gridmix will only use compressed input files
for all the jobs. Gridmix should smartly assign 
> 1. uncompressed input files for jobs the don't need input decompression 
> 2. compressed input files for jobs that need input decompression 

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