Hi Osama - I think i am understanding. A couple of things:
- Two active central nodes against one database is not supported. There should only be one central node in a single cluster active against the database.
- You can failover to a second central node *within the same cluster* automatically if the first central node fails or manually via (Failover ‒ Qlik Sense) by marking a node as a failover candidate in the QMC.
- You can have components active against in two AZ's within the same cluster provided latency is <4 ms between AZs. Persistence ‒ Qlik Sense
- I am not sure what you are trying to accomplish here - full DR or more of an HA configuration. If you are looking for DR with a complete second cluster, then be sure that only one cluster is reading/writing to the fileshare and database at a time.
Question # 1 : if AZ1 is down, do the AZ2 work in this case ? See above.
Question # 2 : All available nodes need to be added on QMC ? You register each node in a cluster, but do not register nodes from one cluster into a QMC of another cluster.
Question # 3 : How can we distinguish which server is central node and which is reload engine. * At the time of cluster installation it is not asking anything. This is found under QMC > Nodes where you specify the workload of the nodes.