Implement initial drain policy for unsharded collections when the user specifies a destination shard

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    • Type: Task
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Affects Version/s: None
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    • Catalog and Routing
    • CAR Team 2024-01-22
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    • 3
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      When `draining` and `userSpecifiedDestination` are true, the unsharded balancer policy should generate migrations to move collections off of the draining shard and to `destinationShard`.

      This will require adding `userSpecifiedDestination` and `destinationShard` to the cluster statistics. The collections currently located on the draining shard can be fetched from config.collections/config.chunks in this initial implementation. This information can be fetched from the unsharded policy's cache later on, but this initial implementation will allow testing to start for removeShard.

            Assignee:
            [DO NOT USE] Backlog - Catalog and Routing
            Reporter:
            Allison Easton
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              Created:
              Updated: