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  1. Core Server
  2. SERVER-45047

Create multiVersion test to validate mixed FCV migrations

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    • Type: Icon: Task Task
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 4.3.3
    • Affects Version/s: None
    • Component/s: Sharding
    • None
    • Fully Compatible
    • Sharding 2019-12-16, Sharding 2019-12-30

      A v4.4 shard node obeys the following rules:

      • The setFCV command and migrations serialize on the shard
      • This guarantees that a shard's FCV does not change while the shard is donating or receiving a chunk
      • When the shard's FCV is "upgrading" or "downgrading", the shard fails to start donating or receiving a chunk
      • When the shard's FCV is "downgraded", the shard uses the 4.2 protocol for donating and receiving chunks
      • When the shard's FCV is "upgraded", the shard uses the 4.4 protocol for donating and receiving chunks

            Assignee:
            alex.taskov@mongodb.com Alexander Taskov (Inactive)
            Reporter:
            alex.taskov@mongodb.com Alexander Taskov (Inactive)
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              Created:
              Updated:
              Resolved: