> 1. ... Do I need to manually create a topic TOPIC1 in cluster K2 and this topic will be used for producing messages to when failover happens.
Correct. When you fail-over producers from K1 to K2, producers will send to TOPIC1 in K2. You may need to manually create that topic and set up write ACLs, etc. MM2 will automatically create and configure "remote topics", including ACLs -- but it won't touch "normal" topics. I recommend you set this up ahead of time. > 2. .. how do I move back to my primary The operation is the same, just in reverse. Any data produced to TOPIC1 in K2 will get replicated to K2.TOPIC1 in K1. A consumer in K1 can then consume from TOPIC1 _and_ K2.TOPIC1 in order to see records that were produced to K2 during failover. Ryanne On Wed, Apr 29, 2020 at 3:05 PM Himanshu Tyagi <tyagi.himansh...@gmail.com> wrote: > Hey Team, > I've a few doubts regarding how the producers work after failover in Mirror > Maker 2 > > Let's say that we have two clusters K1 and K2 and configured MM2 > replication for TOPIC1 (originally created in just K1). > > We configured the active-active replication: > > K1->K2.enabled = true > K2->K1.enabled = true > K1->K2.topics = .* > K2->K1.topics = .* > > On starting mirror maker 2, I see that topics are replicated from cluster > K1 > to K2 in the naming format K1.topic_name_here and vice versa for topics > from cluster K2 to K1. > > I see that there was no topic TOPIC1 created in K2, only K1.TOPIC1 was > created. I see this scenario working for consumers, as in the beginning the > consumers consume TOPIC1 from cluster K1. When the cluster K1 out of > service, fail over happens. Consumers start to consume K1.TOPIC1 from K2. > > My questions are as follows: > > 1. For producers, they won't producer to the topic K1.TOPIC1 in cluster > K2, my question is how do the producers go about producing data. Do I > need > to manually create a topic TOPIC1 in cluster K2 and this topic will be > used for producing messages to when failover happens. > 2. If the above scenario is true, how do I move back to my primary > cluster K1. As, now the topic TOPIC1 in cluster K2 has digressed from > the topic TOPIC in K1. How do we sync the messages in this scenario ? > > > -- > Best, > Himanshu Tyagi > Contact No.- +1 480 465 0625 >
