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Posted to dev@parquet.apache.org by "Vassil Lunchev (JIRA)" <ji...@apache.org> on 2015/03/25 01:25:52 UTC

[jira] [Commented] (PARQUET-225) INT64 support for Delta Encoding

    [ https://issues.apache.org/jira/browse/PARQUET-225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14379003#comment-14379003 ] 

Vassil Lunchev commented on PARQUET-225:
----------------------------------------

Is somebody working on implementing this feature? I have a working code + unit tests for it. Is that interesting to you?

> INT64 support for Delta Encoding
> --------------------------------
>
>                 Key: PARQUET-225
>                 URL: https://issues.apache.org/jira/browse/PARQUET-225
>             Project: Parquet
>          Issue Type: New Feature
>            Reporter: Vassil Lunchev
>
> As of now, parquet doesn't support delta encoding for INT64. However it is planned in the format:
> https://github.com/Parquet/parquet-format/blob/master/Encodings.md
> The benefits of this feature are huge. For timestamps it achieves twice better compression than SNAPPY on plain encoding, and the reading is faster. This feature is actually advertised on the home page of Parquet, even though it is not yet implemented:
> http://parquet.incubator.apache.org/
> http://image.slidesharecdn.com/hadoopsummit-140630160016-phpapp01/95/efficient-data-storage-for-analytics-with-apache-parquet-20-30-638.jpg?cb=1404162126



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