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From "Jonathan Ellis (JIRA)" <>
Subject [jira] Resolved: (CASSANDRA-225) Support mastered writes
Date Tue, 28 Jul 2009 20:48:14 GMT


Jonathan Ellis resolved CASSANDRA-225.

    Resolution: Won't Fix
      Assignee:     (was: Sandeep Tata)

Per Jun any my conversation with Cliff Moon at the hackathon, this is not something we want
to pursue in Cassandra.

> Support mastered writes
> -----------------------
>                 Key: CASSANDRA-225
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>    Affects Versions: 0.4
>         Environment: all
>            Reporter: Sandeep Tata
>         Attachments: 225.patch
> Writes to a row today can be run on any of the replicas that own the row. An additional
set of APIs to perform "mastered" writes that funnel through a primary is important if applications
have some operations that require higher consistency. Test-and-set is an example of one such
operation that requires a higher consistency guarantee.
> To stay true to Cassandra's performance goals, this should be done in a way that does
not compromise performance for apps that can deal with lower consistency and never use these
APIs. That said, an app that mixes higher consistency calls with lower consistency calls should
be careful that they don't operate on the same data.

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