accumulo-notifications mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-956) Iterator to transform key parts
Date Mon, 14 Jan 2013 19:00:13 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13552991#comment-13552991
] 

Keith Turner commented on ACCUMULO-956:
---------------------------------------

It may be necessary to filter based on column family.   

For example, if colfam C can be transformed to col fam A or B (depending on other parts of
the key).   If a seek came in for col fam A, then the soruce would be seeked for colfam C.
 However this could result in transformations to col fam B, which we would want to suppress.


                
> Iterator to transform key parts
> -------------------------------
>
>                 Key: ACCUMULO-956
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-956
>             Project: Accumulo
>          Issue Type: Improvement
>            Reporter: Brian Loss
>             Fix For: 1.5.0
>
>         Attachments: key_transforming_iterator-1.patch, key_transforming_iterator-2.patch,
key_transforming_iterator.patch
>
>
> Iterators that transform parts of the key can be tricky if any transformation affects
sort ordering.  Implement an iterator that takes care of the tricky details that come with
modifying sort order (e.g., handling scan-time iterator reconstruction and the associated
seek).

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message