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From Russell Jurney <russell.jur...@gmail.com>
Subject Re: Avro file size is too big
Date Wed, 04 Jul 2012 21:58:01 GMT
This thread looks useful. Are you flushing too often?

Russell Jurney http://datasyndrome.com

On Jul 4, 2012, at 6:33 AM, Ruslan Al-Fakikh <metaruslan@gmail.com> wrote:

> Hello,
> In my organization currently we are evaluating Avro as a format. Our
> concern is file size. I've done some comparisons of a piece of our
> data.
> Say we have sequence files, compressed. The payload (values) are just
> lines. As far as I know we use line number as keys and we use the
> default codec for compression inside sequence files. The size is 1.6G,
> when I put it to avro with deflate codec with deflate level 9 it
> becomes 2.2G.
> This is interesting, because the values in seq files are just string,
> but Avro has a normal schema with primitive types. And those are kept
> binary. Shouldn't Avro be less in size?
> Also I took another dataset which is 28G (gzip files, plain
> tab-delimited text, don't know what is the deflate level) and put it
> to Avro and it became 38G
> Why Avro is so big in size? Am I missing some size optimization?
> Thanks in advance!

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