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Posted to issues@spark.apache.org by "Peter Aberline (JIRA)" <ji...@apache.org> on 2015/08/23 20:10:46 UTC
[jira] [Issue Comment Deleted] (SPARK-8510) NumPy arrays and
matrices as values in sequence files
[ https://issues.apache.org/jira/browse/SPARK-8510?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Peter Aberline updated SPARK-8510:
----------------------------------
Comment: was deleted
(was: See PR at https://github.com/apache/spark/pull/6995)
> NumPy arrays and matrices as values in sequence files
> -----------------------------------------------------
>
> Key: SPARK-8510
> URL: https://issues.apache.org/jira/browse/SPARK-8510
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Reporter: Peter Aberline
> Priority: Minor
>
> Using the DoubleArrayWritable as an example, I have added support for storing NumPy arrays and matrices as elements of Sequence Files.
> Each value element is a discrete matrix or array. This is useful where you have many matrices that you don't want to join into a single Spark Data Frame to store in a Parquet file.
> There seems to be demand for this functionality:
> http://mail-archives.us.apache.org/mod_mbox/spark-user/201506.mbox/%3CCAJQK-mg1PUCc_hkV=Q3n-01iOQ_pkWE1g-c39XiMCo3KhqngQg@mail.gmail.com%3E
> I originally put this work in PR 6995, but closed it after suggestions from a user to use NumPy's built in serialization. My second version is in PR 8384.
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