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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-3015) Rewrite of AvroStorage
Date Tue, 08 Jan 2013 18:30:13 GMT

    [ https://issues.apache.org/jira/browse/PIG-3015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13547088#comment-13547088
] 

Doug Cutting commented on PIG-3015:
-----------------------------------

> Avro can recover from a data block corruption but cannot from a sync marker corruption.

BTW, I think that's probably a bug in Avro's Java implementation that (separately) we should
fix.
                
> Rewrite of AvroStorage
> ----------------------
>
>                 Key: PIG-3015
>                 URL: https://issues.apache.org/jira/browse/PIG-3015
>             Project: Pig
>          Issue Type: Improvement
>          Components: piggybank
>            Reporter: Joseph Adler
>            Assignee: Joseph Adler
>         Attachments: bad.avro, good.avro, PIG-3015-2.patch, PIG-3015-3.patch, PIG-3015-4.patch,
PIG-3015-5.patch, TestInput.java, Test.java
>
>
> The current AvroStorage implementation has a lot of issues: it requires old versions
of Avro, it copies data much more than needed, and it's verbose and complicated. (One pet
peeve of mine is that old versions of Avro don't support Snappy compression.)
> I rewrote AvroStorage from scratch to fix these issues. In early tests, the new implementation
is significantly faster, and the code is a lot simpler. Rewriting AvroStorage also enabled
me to implement support for Trevni (as TrevniStorage).
> I'm opening this ticket to facilitate discussion while I figure out the best way to contribute
the changes back to Apache.

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