Write consistency quorum

Elastic Stack Elasticsearch
1

Hello.

We currently have setup with multiple virtual machine hosts and two SANs for failover.
I was thinking about best way to deploy cluster in this configuration.

So I thought about deploying some nodes with master role for split-brain protection and make other nodes serve data only. Question I've been thinking of: is it possible to override default quorum value for write consistency so cluster may write data if one of SANs goes down?
I know about "discovery.zen.minimum_master_nodes" for master quorum and been searching for something like this for write consistency quorum. Another way to do this is just do not use quorum at all but I don't think this is optimal solution.

Thanks,
Alex

2

There is write quorum, but how can ES know if a SAN has gone down?

3

Hello, Mark.

So the best option would be just wait until missing replicas will be allocated on live part of the cluster?

4

And use allocation awareness as well.