Not sure what you mean by 1 topic with 3 partition and replication-factor = 2. You may need to revisit the idea of partitions and replication factor from docs.
Thanks, On Fri, 13 Sep 2019 at 11:51, Alok Dwivedi <alok.dwive...@maersk.com> wrote: > Hi All > Can someone please advise what is the recommended practice for replacing a > lost broker in a Kafka cluster. Lets consider this sequence of events > > > 1. 3 node cluster say with 1 topic of 3 partitions and RF of 2. > 2. That gives 2 partitions on each Broker (B1,B2,B3) > 3. Lets say we lost B3. We still have B1 and B2 and 4 partitions. > Assuming each broker had only 1 leader, by losing B3 we lost 1 leader and 1 > replica. Out of remaining replicas another leader will be selected for any > lost leaders so we carry on with no downtime. > 4. I want to know what we should do to go back to 3 broker cluster. Are > there standard guidelines around any procedure to be done after restarting > the lost broker mainly when the lost broker has been replaced with another > instance which no longer has old log.dirs i.e. data existing on this lost > broker is gone. Is there a way to rebuild missing replica partitions now > from existing partitions or what is the recommended practice in that > scenario? Will we need some kind of partition re-assignment here and will > it ensure that we now go back from 4 partitions to 6 partitions? > > > Can someone please advise what happens automatically in this case and what > (if anything) should be done as a standard practice to get things back to > normalcy. > > Thanks > Alok Dwivedi > Data Architect > Maersk Always On Platform > > > > > > Classification: Public > > ________________________________ > > The information contained in this message is privileged and intended only > for the recipients named. If the reader is not a representative of the > intended recipient, any review, dissemination or copying of this message or > the information it contains is prohibited. If you have received this > message in error, please immediately notify the sender, and delete the > original message and attachments. > > Maersk will as part of our communication and interaction with you collect > and process your personal data. You can read more about Maersk's collection > and processing of your personal data and your rights as a data subject in > our privacy policy < > https://www.maersk.com/front-page-requirements/privacy-policy> > > Please consider the environment before printing this email. >
