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From "Jeff Hammerbacher (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2055) Serialize WAL as Avro records
Date Sat, 19 Dec 2009 02:43:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12792760#action_12792760
] 

Jeff Hammerbacher commented on HBASE-2055:
------------------------------------------

Additional criteria: Avro has clients for reading and writing data files in several languages
which will facilitate writing debugging and profiling utilities.

> Serialize WAL as Avro records
> -----------------------------
>
>                 Key: HBASE-2055
>                 URL: https://issues.apache.org/jira/browse/HBASE-2055
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Minor
>
> There was some advocacy of using Avro for serialization of HBase WAL records up on hbase-dev@.
Idea is Hadoop core is getting away from Writables and Avro is the blessed replacement. 
> I think we have this criteria for its use:
> 1) Performance of writing Avro records is no worse than that for writing Writables into
a SequenceFile.
> 2) Space consumed by Avro serialization is no worse than that of Writables
> 3) File format is amenable to appends (cannot require valid trailers, etc.)
> I'll put up a patch so we can try it out. 

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