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  1. Core Server
  2. SERVER-53553

Make tenant migration recipient to start cloning tenant data only after the donor node's lastCommittedOpTime is >= startMigrationDonorTimestamp

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    • Fully Compatible
    • Repl 2021-02-22

      As part of this ticket, we need to do 2 things
      1) Tenant migration recipient should persist the startMigrationDonorTimestamp by writing it to the tenant migration recipient instance's state document.
      2) TenantMigrationRecipientService::Instance::_getStartOpTimesFromDonor() will send find commands with afterClusterTimestamp set as startMigrationDonorTimestamp and with readConcern:kMajority. That will make sure that the majority reads (for collection cloning and oplog fetching) by the recipient on the donor will be made only after startMigrationDonorTimestamp.

            Assignee:
            matthew.russotto@mongodb.com Matthew Russotto
            Reporter:
            suganthi.mani@mongodb.com Suganthi Mani
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