Hi, I've read up a little on MirrorMaker (e.g. the wiki [1] and KIP-3 [2]), but haven't yet found a definitive answer to the following question.
Let's assume I am producing a certain topic to a Kafka cluster in datacenter A. I set up MirrorMaker in datacenter B and C to mirror the topic from datacenter A. Can I assume that the mirrored data in datacenter B and C are exactly the same, including the same offsets? For example, let's say a consumer in datacenter B dies, and I know the offset up to which it has read. Can a consumer in datacenter C take over exactly where B left off by reading from its own copy starting at the same offset? If MirrorMaker has logic to prevent dupes (something like what's described in [3]) and lost messages, it seems like this should work. Please let me know if my terminology is imprecise and I'll try to clarify! Thanks, Dave. [1] https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=27846330 [2] https://cwiki.apache.org/confluence/display/KAFKA/KIP-3+-+Mirror+Maker+Enhancement [3] https://cwiki.apache.org/confluence/display/KAFKA/FAQ#FAQ-HowdoIgetexactly-oncemessagingfromKafka ?
