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From "Brandon Williams (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3883) CFIF WideRowIterator only returns batch size columns
Date Wed, 07 Mar 2012 19:26:58 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13224622#comment-13224622
] 

Brandon Williams commented on CASSANDRA-3883:
---------------------------------------------

Optimally, we'd have a way to express "I'm at this column offset in this row, give me the
next X number of columns, even if it requires going to the next row."  But I'm not sure how
to do that sanely, either.  I know Jake is using a special CFIF for hive to handle wide rows
that basically just grabs one row at a time and paginates it, which is fine if all the rows
are wide, but will take a performance hit if they are not.  Still, that might be the best
thing to do since using get_page_slices is currently so hairy.
                
> CFIF WideRowIterator only returns batch size columns
> ----------------------------------------------------
>
>                 Key: CASSANDRA-3883
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3883
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>    Affects Versions: 1.1.0
>            Reporter: Brandon Williams
>             Fix For: 1.1.0
>
>         Attachments: 3883-v1.txt
>
>
> Most evident with the word count, where there are 1250 'word1' items in two rows (1000
in one, 250 in another) and it counts 198 with the batch size set to 99.

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