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[SPARK-14482][SQL] Change default Parquet codec from gzip to snappy - #12256
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rxin wants to merge 1 commit into
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[SPARK-14482][SQL] Change default Parquet codec from gzip to snappy#12256rxin wants to merge 1 commit into
rxin wants to merge 1 commit into
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| sqlContext.conf.writeLegacyParquetFormat.toString) | ||
| // Sets compression scheme | ||
| conf.set( |
ContributorAuthor
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the old nested map, getOrElse was super confusing...
@liancheng / @HyukjinKwon let's avoid doing things like this in the future
SparkQA
commented
Apr 8, 2016
Test build #55333 has finished for PR 12256 at commit
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rxin
commented
Apr 8, 2016
ContributorAuthor
cc @nongli |
nongli
commented
Apr 8, 2016
Contributor
LGTM |
rxin
commented
Apr 9, 2016
ContributorAuthor
Merging in master. |
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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.