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From "Christopher Tubbs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1528) Scans should deterministically return entries with identical timestamps
Date Fri, 21 Jun 2013 23:41:20 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13690900#comment-13690900
] 

Christopher Tubbs commented on ACCUMULO-1528:
---------------------------------------------

No, that should be unique, all the way to timestamp. There's no telling which sources will
be read first, and returned in a batch... and if it's the last key in a batch, the rest will
be skipped when the scan session continues. So, it's not only non-deterministic which order
they arrive (because of the multiple sources), it's also non-deterministic which ones will
arrive at all.
                
> Scans should deterministically return entries with identical timestamps
> -----------------------------------------------------------------------
>
>                 Key: ACCUMULO-1528
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1528
>             Project: Accumulo
>          Issue Type: Sub-task
>          Components: tserver
>            Reporter: Christopher Tubbs
>            Priority: Minor
>
> Scans will return multiple versions of the same key (down to identical timestamps, but
possibly with different values), non-deterministically. A source identity (eg. filename/timestamp)
could be used to order these consistently.

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