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The tag and exclude-list arguments are not needed. They have been left in place for backward compatibility and for advanced users who might have very unusual requirements. If you're not sure if you need them, you don't. Leave them alone. If you must know, please refer to "Message Loop Prevention" in the advanced topics section below. The prevention of message looping is now automatic and requires no user action.

If the link between the two sites has network latency, this can be compensated for by increasing the ack frequency with --ack N to achieve better batching across the link between the two sites.

Caveats, Limitations, and Things to Avoid

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