GitHub user rxin opened a pull request:
https://github.com/apache/spark/pull/12256
[SPARK-14482][SQL] Change default Parquet codec from gzip to snappy
## What changes were proposed in this pull request?
Based on our tests, gzip decompression is very slow (< 100MB/s), making
queries decompression bound. Snappy can decompress at ~ 500MB/s on a single
core.
This patch changes the default compression codec for Parquet output from
gzip to snappy, and also introduces a ParquetOptions class to be more
consistent with other data sources (e.g. CSV, JSON).
## How was this patch tested?
Should be covered by existing unit tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rxin/spark SPARK-14482
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12256.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #12256
----
commit 70ea5f88a3eaf878379acaf0e31597c297cdb8d4
Author: Reynold Xin <r...@databricks.com>
Date: 2016-04-08T07:15:24Z
[SPARK-14482][SQL] Change default compression codec for Parquet from gzip
to snappy
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