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From "Jakob Homan (JIRA)" <>
Subject [jira] [Commented] (HIVE-3585) Integrate Trevni as another columnar oriented file format
Date Fri, 04 Jan 2013 20:46:14 GMT


Jakob Homan commented on HIVE-3585:

bq. Will Trevni but just another Serde/inputFormat combination of will it involve large scale
changes to hive?
Just another serde/inputformat combination.  In fact, for Avro-wrapped Trevni, it'll just
be AvroSerde + Trevni{I|O}Format.  For raw Trevni data it'll just be TrevniSerde + (probably)
(?Raw)Trevni{I|O}Format.  This is not a big patch and doesn't require any more changes to
Hive than AvroSerde did - none at all.  As I mentioned above, a veto on this can't be sustained
on technical grounds, so I'm happy to re-assure He as to his concerns, but I don't see any
reason not to proceed.

bq. I did not get why it does not work with partition schema update.
I didn't want to try to mix Avro-style schemas and Trevni-style schemas, but Mark has a way
around that.
> Integrate Trevni as another columnar oriented file format
> ---------------------------------------------------------
>                 Key: HIVE-3585
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>          Components: Serializers/Deserializers
>    Affects Versions: 0.10.0
>            Reporter: alex gemini
>            Assignee: Mark Wagner
>            Priority: Minor
> add new avro module trevni as another columnar format.New columnar format need a columnar
SerDe,seems fastutil is a good choice.the shark project use fastutil library as columnar serde
library but it seems too large (almost 15m) for just a few primitive array collection.

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