[jira] Commented: (CASSANDRA-197) Expose ring map to client for more direct access

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12712171#action_12712171 ] 

Jonathan Ellis commented on CASSANDRA-197:
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-1 on violating encapsulation wholesale.

i could see maybe having a call "endpoint_for_key" that gives an ip/port pair for primary node owning a key, but would that be useful enough to bother with?

> 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
>            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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