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https://issues.apache.org/jira/browse/COUCHDB-2938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15111572#comment-15111572
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Russell Branca commented on COUCHDB-2938:
-----------------------------------------
This is ready for review. PRs out in
https://github.com/apache/couchdb-fabric/pull/37 and
https://github.com/apache/couchdb-couch/pull/134.
> 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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