Hi all,
new in community! So I try to post my questions as clear as possible.
we currently have 10 servers on differnt locations. All servers have incoming dials from modems with RS232, in average 8 modems each server.
We want to virtualize the servers on two hot standby ESX-Hosts. The only thing that keeps me up at night is the modem-connection to the servers. We got 80 modems and one ESX-Host!!!!:smileyconfused:
The idea is ot use a moxa converter and then to connect the modems with a moxa.
Does anybody already face that problem and solved it?
How are your experience with moxa and HA?
Welcome to the forums. I'm not familiar with Moxa but it sounds like it is an serial to ethernet type device? If that is the case, and the application in your VMs support it, you should be set. Keep in mind that the connection would be from the VMs on the host to the modems.
I wouldn't recommend trying to connect the modems directly to either of the hosts as that would 'pin' the VM to that host and not provide any support for the VMs to vMotion or failover with HA.
Does that make sense?
Hi,
thx for your response!
moxa is indeed a kind of converter RS232 analog to ip. We want to connect 24 modems to the moxa. On the host we want to virtualize 7 servers. 3 to 4 modems determine on one virtualized machine. A second host is hot standby.
There are two questions:
1. Does the connections with moxa works?
2. Does the hot standby works?
1. The issue of VM connectivity to the Moxa adaptor would have to be tested first but I can't see a reason why it wouldn't work. I'd recommend trying it with your physical server, before you P2V them, to confirm that the application(s) and the modems will work with the Moxa adaptor. If that works, it should work the same as a VM.
2. You can use vSphere HA in a "standby host" admission control configuration. However, knowing what little I do about your environment I'd recommend used percentage based. This would mean that you are running your VMs on both of the 2 hosts, while reserving 50% of the resources. If either host failed the VMs running on it will restart on the remaining host.
