nickva commented on issue #831: Filter _changes by key to speed up replication
URL: https://github.com/apache/couchdb/issues/831#issuecomment-331277881
 
 
   Maybe another option is to use a Mango based selector as described here:
   
   https://blog.couchdb.org/2016/08/15/feature-replication/comment-page-1/ (see 
A New Way to Filter section).
   
   Then each replication document would specify a selector to pick from a 
specific class only.
   
   By default the basic view based filtering doesn't end up using the view data 
and just re-uses the map function in the most naive way.
   
   There is a feature which allows using the view. It was implemented here:
   
   https://github.com/apache/couchdb-couch-mrview/pull/2
   
    I think it involves added these options to the view `"options": 
{"seq_indexed": true, "keyseq_indexed": true}}`. But have never used it and not 
sure how it works.
 
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