Who has control?

kb9jlo · Mon Sep 11, 2017 9:43 pm

I'm 99.9% sure I know the answer to this question but I just want to double check...

When I'm looking at the iSCSI sessions for a target, you'll see the sessions for each of the nodes, then on some targets you'll see connection to VMware servers ---
I'm assuming that means that particular target on that particular node is the one actually serving up that particular disk --- correct?

kb9jlo · Tue Sep 12, 2017 4:02 pm

I was also curious - is there a way to "move" which node is serving up the disk?

Since I have three nodes and three disks - would it make sense to have one node each serving one of the disks?
For example: Node A has Disk 1; Node B has Disk 2; Node C has Disk 3...

Wed Sep 13, 2017 9:49 am

Hello, kb9jlo, thank you for your question. Yes, you are right, these are connections to the host. As I see you have 2 iSCSI connections to DECSESXi11, and 1 to DECSESXi10 and DECSESXi12. Could you please clarify if you are using hyper-converged infrastructure?

kb9jlo · Wed Sep 13, 2017 9:57 pm

Sergey (staff) wrote:Hello, kb9jlo, thank you for your question. Yes, you are right, these are connections to the host. As I see you have 2 iSCSI connections to DECSESXi11, and 1 to DECSESXi10 and DECSESXi12. Could you please clarify if you are using hyper-converged infrastructure?

I'm never quite sure what you mean by "hyper-converged"...

I have three Starwind nodes (MS Server 2016 VM's) each on a VM host. Three nodes, three hosts.
Each node has (3) disks, each approx. 6 TB and since there are 3 nodes that's 3 copies. I use Infiniband 10GbE cards for sync & heartbeat.

I was looking in VMware vCenter today and in HA I can see who has control of the cluster and I think I can see who has what disks... Not sure what all I'm seeing, of course the master was easy to figure out.

Thu Sep 14, 2017 4:20 pm

You can distribute VMs between available compute resources (hosts) using vMotion. You have to assign a network interface for vMotion on each node. Check this video from VMware:
https://www.youtube.com/watch?v=oMQFH8dQGfA
Please note, virtual disks must be Thick Provision Eager Zeroed in order to enable clustering features.