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https://issues.apache.org/jira/browse/SPARK-18252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aleksey Ponkin updated SPARK-18252:
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Summary: Improve serialized BloomFilter size (was: Compressed BloomFilters)
> Improve serialized BloomFilter size
> -----------------------------------
>
> Key: SPARK-18252
> URL: https://issues.apache.org/jira/browse/SPARK-18252
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 2.0.1
> Reporter: Aleksey Ponkin
> Priority: Minor
>
> Since version 2.0 Spark has BloomFilter implementation -
> org.apache.spark.util.sketch.BloomFilterImpl. I have noticed that current
> implementation are using custom class org.apache.spark.util.sketch.BitArray,
> which are allocating memory for filter in the begining. So even filters with
> small number of elements inserted will be preatty large when there will be a
> need of serialization. Is there any interest to use
> [https://github.com/RoaringBitmap/RoaringBitmap][RoaringBitmap] or
> [javaewah][https://github.com/lemire/javaewah] to compress bloom filters or
> may be compress them during serialization stage.
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