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https://issues.apache.org/jira/browse/COUCHDB-631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12805566#action_12805566
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Chris Anderson commented on COUCHDB-631:
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There's a better approach:
Instead of following _changes at all, just replicate the list of docs directly.
Since we don't keep old revs around, this won't be any different than normal
replication (for those docs).
The #1 use case for this sort of thing is when you have a short list of docs
you want to replicate from a large database. If you traverse the by_seq index
you have to look at all the docids in the database. If you lookup the handlful
of docs on your list, it's much faster.
> Replication by doc Ids
> ----------------------
>
> Key: COUCHDB-631
> URL: https://issues.apache.org/jira/browse/COUCHDB-631
> Project: CouchDB
> Issue Type: New Feature
> Components: Replication
> Environment: trunk
> Reporter: Filipe Manana
> Assignee: Chris Anderson
> Priority: Minor
> Attachments: replication-by-doc-ids-alternative-impl-2_trunk.patch,
> replication-by-doc-ids-alternative-impl_trunk.patch,
> replication-by-doc-ids_trunk.patch
>
>
> The following patch adds support for the optional "doc_ids" attribute (array
> of strings) of a JSON replication object.
> The idea was suggested recently by Chris Anderson in the dev mailing list.
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