Hi,
we have 4 node cluster and SQL serversrs are running as below:
Primary DC:
SQLA1
SQLA2
SQLA3
SQLA4
DR :
SQLB1
SQLB2
SQLB3
SQLB4
Current Owner Node is running under SQLB1 and there is Alwasyson AG configured in between nodes
AG1: SQLA1 & SQLA2
AG2: SQLA3 & SQLA4
AG3: SQLB1 & SQLB2
AG4: SQLb3 & SQLB4
Async AG from AG1 to AG3
Replication(Transactional) Between these nodes:
AG1 & AG2
AG3 & AG4
Now i would like to do SQL Server patching (Production Environment)on all 8 servers, for that which is the feasible way to proceed. Kindly suggest the way forward
Suggest me in that way if suppose anything happen during patching between first two nodes so that we can rollback easily.
Also what kind of rollback steps need to be take care.. Thanks
Regards,
DBA
DBA