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  1. Documentation
  2. DOCS-3679

Document that addShard can break existing balance

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      When you have a lot of sharded collections perfectly balanced across X shards, adding a new shard will cause all existing collections to rebalance across X+1 shards, which might take some time.

      I suggest to put a note about this in our docs, as some users apparently expect mongoS to only rebalance newly sharded collections.

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            sam.kleinman Sam Kleinman (Inactive)
            alex.komyagin@mongodb.com Alexander Komyagin
            Jess Mokrzecki Jess Mokrzecki
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              Created:
              Updated:
              Resolved:
              8 years, 38 weeks, 5 days ago