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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-736) Add Column Pagination Filter
Date Thu, 23 Aug 2012 02:26:42 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13440009#comment-13440009
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Josh Elser commented on ACCUMULO-736:
-------------------------------------

Given that all data retrieval from Accumulo is returned to the client via a Java Iterator,
I'm a little confused about the application of such a feature.

If you have many columns in one row, you'll get a Key-Value pair for each Row-Column at which
point it's an exercise for the client not to consume more than can fit in its memory.

Other applications seem to be solvable through a custom Accumulo Iterator. For example, if
you want to fetch all columns for a row in one call in batches of size N, this is easily done
with an Accumulo Iterator without any core changes.

Please assume I'm an HBase API novice. Can you provide some more concrete details?

Thanks.
                
> Add Column Pagination Filter
> ----------------------------
>
>                 Key: ACCUMULO-736
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-736
>             Project: Accumulo
>          Issue Type: Bug
>          Components: client
>            Reporter: Pradeep Gollakota
>            Assignee: Billie Rinaldi
>
> Client application may need to perform pagination of data depending on the number of
columns returned. This would be more efficient if the database itself handled the pagination.
> Similar to https://issues.apache.org/jira/browse/HBASE-2438

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