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Tiered Storage is not initially supported, but a detailed design of the metadata synchronization protocol, API schema, and state management will be provided in a follow-up KIP. A mirror follower that receives an OffsetMovedToTieredStorageException from the source leader handles it by marking the partition as failed, and also the mirror partition state will move to FAILED stateBefore this is supported, the destination cluster will treat all the data as in local storage, and mirrors every record, regardless of where it was stored originally.

Share Group

Cluster Mirroring supports both traditional consumer groups and share consumer groups (Kafka Queue functionality) to ensure seamless failover for all consumer types. While the data mirroring mechanism remains identical, the offset synchronization strategy differs based on the group type.

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