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From "Ashish Shinde (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-3474) HFileOutputFormat to use column family's compression algorithm
Date Fri, 18 Mar 2011 05:30:30 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashish Shinde updated HBASE-3474:
---------------------------------

    Attachment: patch3474.txt

Added unit tests for 
1. compression serialization deserialization to job config
2. testing that the hfile writers use the config correctly.

Minor issues
-------------

1. The test parses out HFile.Reader.toString() to retrieve the compression algorithm used
on an HFile. One alternative is to add getCompressionAlgo() to HFile.Reader. 
2. The testColumnFamilyCompression create a mapred job just to get hold of an usable writer.
Not sure if this is the best thing to do.

> HFileOutputFormat to use column family's compression algorithm
> --------------------------------------------------------------
>
>                 Key: HBASE-3474
>                 URL: https://issues.apache.org/jira/browse/HBASE-3474
>             Project: HBase
>          Issue Type: Improvement
>          Components: mapreduce
>    Affects Versions: 0.92.0
>         Environment: All
>            Reporter: Ashish Shinde
>             Fix For: 0.92.0
>
>         Attachments: patch3474.txt, patch3474.txt, patch3474.txt
>
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> HFileOutputFormat  currently creates HFile writer's using a compression algorithm set
as configuration "hbase.hregion.max.filesize" with default as no compression. The code does
not take into account the compression algorithm configured for the table's column family.
 As a result bulk uploaded tables are not compressed until a major compaction is run on them.
This could be fixed by using the column family descriptors while creating HFile writers.

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