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From "Michael Greene (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-197) Expose ring map to client for more direct access
Date Sun, 23 Aug 2009 01:47:14 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12746541#action_12746541
] 

Michael Greene commented on CASSANDRA-197:
------------------------------------------

The table description get_string_property returns a multi-level dictionary encoded as JSON
would.  I'm not sure I agree with the 'non-official APIs need to be strings' de facto policy
but if it stands I'd imagine we would also encode the return for this call like JSON would.

> Expose ring map to client for more direct access
> ------------------------------------------------
>
>                 Key: CASSANDRA-197
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-197
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jun Rao
>            Assignee: Jun Rao
>         Attachments: issue197.patchv1
>
>
> For certain applications, it would be nice if a read is sent to a node that owns the
data locally. This saves an extra network hop. To do that, a client will need to cache the
ring map and use it to figure out the nodes owning a row.

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