GitHub user codelipenghui added a comment to the discussion: Active-active and 
no data loss. Is it possible?

> We are thinking of geo replication. But since geo replication is 
> asynchronous, we are worried about message loss. Every single message cannot 
> be lost.

The geo-replication is asynchronous, but it does not result in message loss. 
The replication state is stored in a cursor(ledger backend), even the broker 
crash, the replication state not lost. So the new broker can resume the 
replicate task.

GitHub link: 
https://github.com/apache/pulsar/discussions/18457#discussioncomment-4133536

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