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I've got an azure db with replica. the master has: Standard S6- 400 DTUs the replica has: Standard S3- 100 DTUs

Is it a problem for a replica to be in a different service tier and dtu than master?

2 Answers 2

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That depends on the purpose of the replica. If it's there to provide high availability, after the failover it won't be able to support the same workload as the primary.

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from what i checked there is no problem in having different DTU in replica and primary. There is however a best practice to have the same service tier between the two (standard and premium) as to not cause a HADR_SYNC_COMMIT error.

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