I was reading the white paper on FCI + AlwaysOn as well as several other resources on quorum voting differences in Windows Server 2008 and 2014 and had 3 questions.
1- Will giving a node in the WSFC that is a read only Replica a vote in WSFC let it vote on the FCI quorum or is the 'vote' in WSFC for something else? That part I'm not clear on. The host is only part of an AlwaysOn replica set and in the same WSFC as the FCI, but it is not part of the FCI. It currently shows as having a vote in WSFC.
Will it count as a vote for any FCI's we have on that WSFC or it will be ignored?
Get-ClusterNode | fl Nodename, Nodeweight NodeName : Server1 NodeWeight : 1 NodeName : Server2 NodeWeight : 1 NodeName : Server3 NodeWeight : 1 Get-ClusterQuorum Cluster QuorumResource ------- -------------- Cluster1 Cluster Disk 2
2- Will a long failover (let's say 30-50 seconds) cause a service shut down in 2012 due to the quorum disk NOT being online during that period if the server is turned off/disabled for some reason, leaving us with only 2 or 1 vote(s)? In other words is WSFC intelligent enough to know that a Quorum is a shared FCI resource in which the host is currently failing over, so temporary ignore the fact that it's down. Sometimes an FCI failover takes a long time on Windows 2008 in our environment.
3- Will any FCI have a issue if it only has 1 vote? Let's say we have a quorum and a 2nd node and both the quorum and 2nd node are down at the moment due to failover or a disk issue. Would that 1 vote then say it has 50% or less and turn off services?
Edit: I could also ask this differently: Is the vote a *total available number of votes in the entire WSFC or is it just currently available nodes? I feel it's the *total number of all nodes regardless of current state hence why we need to stop votes from the DR sites often but I wanted clarification. Thanks!
Current topology is simple:
2 node multi tenant cluster (2 active instances on 2 nodes). This will be updated to meet our requirements of n+1 so we will have 3 nodes. 1 read only AlwaysOn read only replica server with no automatic failover 1 quorum disk on the FCI as a witness