crunch-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Gabriel Reid (JIRA)" <>
Subject [jira] [Resolved] (CRUNCH-545) Writing to HFiles starts a job per column family
Date Mon, 20 Jul 2015 13:28:05 GMT


Gabriel Reid resolved CRUNCH-545.
       Resolution: Fixed
    Fix Version/s: 0.13.0

Pushed to master

> Writing to HFiles starts a job per column family
> ------------------------------------------------
>                 Key: CRUNCH-545
>                 URL:
>             Project: Crunch
>          Issue Type: Improvement
>            Reporter: Gabriel Reid
>            Assignee: Gabriel Reid
>             Fix For: 0.13.0
>         Attachments: CRUNCH-545.patch,,
> When writing to HFiles via {{HFileUtils.writeToHFilesForIncrementalLoad}}, a separate
MR job is started up per column family defined for the table, regardless of whether or not
there is any data for each of these column families.
> Each of the column family jobs runs over the full set of Cells, filters for the desired
column family, and then partitions the data.
> For tables with multiple column families, it would be a lot more efficient to sort/partition
all of the data together, and then split it out per column family afterwards.

This message was sent by Atlassian JIRA

View raw message