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https://issues.apache.org/jira/browse/COUCHDB-2938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15168499#comment-15168499
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ASF subversion and git services commented on COUCHDB-2938:
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Commit e98318757a0d6836a4388d4d1513a0ac589704ba in couchdb's branch
refs/heads/master from [~kxepal]
[ https://git-wip-us.apache.org/repos/asf?p=couchdb.git;h=e983187 ]
Fix ddoc_cache for clustered calls
COUCHDB-2938
> Filtered changes should use ddoc_cache
> --------------------------------------
>
> Key: COUCHDB-2938
> URL: https://issues.apache.org/jira/browse/COUCHDB-2938
> Project: CouchDB
> Issue Type: Bug
> Components: Database Core
> Reporter: Russell Branca
> Assignee: Russell Branca
>
> One of the primary functions of the ddoc_cache is to avoid having to ship the
> entire ddoc across the wire for every shard. You can see where we do this for
> views in [1]. We currently do not use the same pattern for filtered changes
> feeds, which means we're still susceptible to overloading a network with ddoc
> traffic as the ddoc needs to be sent to every shard that will filter docs. We
> should switch filtered changes feeds to use the same patterns as map and
> reduce views.
> [1]
> https://github.com/apache/couchdb-fabric/blob/master/src/fabric_rpc.erl#L91-L92
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