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From "sankalp kohli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4736) Cassandra should expose a native existence check API
Date Sat, 21 Sep 2013 20:10:51 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13773885#comment-13773885
] 

sankalp kohli commented on CASSANDRA-4736:
------------------------------------------

Got your argument. Yes we sometimes store large objects.
Another improvement which could be done is that nodes can return a boolean or digest(for less
changes) to the coordinator. 

                
> Cassandra should expose a native existence check API
> ----------------------------------------------------
>
>                 Key: CASSANDRA-4736
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4736
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: sankalp kohli
>            Priority: Minor
>              Labels: features
>
> Currently Cassandra does not have an existence check API. Because of this, data needs
to be read and thats how you know whether data is present or not. 
> This is not optimal because one replica needs to provide data. Instead a new API could
be exposed where each replica only sends out hash of the data. Repairs and other stuff can
happen like a normal read call. 

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