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  1. Core Server
  2. SERVER-12872

Be able to guarantee who a node will use as a target for initial sync

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Duplicate
    • Affects Version/s: 2.4.9
    • Fix Version/s: None
    • Component/s: Replication
    • Labels:
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      Description

      Currently, we can use the rs.syncFrom() helper to provide a temporary override on who we want a node to sync-off of. However, when performing an initial sync, either because of falling off the oplog or adding a node, we have no mechanism to do this.

      The second we start up the server it will begin initial sync without a way for us who to determine whom we want to sync off of (without downtime). Potentially putting unwanted load on a primary or other node.

      It would be nice to make syncFrom somehow determinable at startup time prior to the initial sync beginning.

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