[GitHub] [couchdb] nickva opened a new pull request, #4095: Implement winning_revs_only option for the replicator

[GitBox <gi...@apache.org>]

nickva opened a new pull request, #4095:
URL: https://github.com/apache/couchdb/pull/4095

   `winning_revs_only` option replicates only the winning revisions from the source to the target, effectively discarding conflicts.
   
   This option may be used as an alternative to the custom VDU strategy, or manual _all_docs read and POST to target scripts, often used by users to discard conflicted document revisions.
   
   Behind the scenes the implementation simply switches the `_changes` feed style to `main_only` from the replication default of `all_docs`.
   
   Additionally, when enabled, the `winning_revs_only` option, will generate a different replication ID and use a different set of checkpoints than the default case. This should allows first replicating with `winning_revs_only: true`, and then later replicate normally between the same endpoints, in order to "backfill" the rest of the revisions.
   
   The main test is in the couch_replicator_many_leaves since we already assert how multiple conflicting docs replicate there. The test was also simplified to remove the `{remote, remote}` tuple as we only have remote endpoints currently.
   
   Issue: https://github.com/apache/couchdb/issues/4034
   
   


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[GitHub] [couchdb] nickva merged pull request #4095: Implement winning_revs_only option for the replicator

[GitBox <gi...@apache.org>]

nickva merged PR #4095:
URL: https://github.com/apache/couchdb/pull/4095


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