Posted 12 October 2017 - 10:36 PM
I suspect that I'm a special case.
We created our cluster to be very "wide" but not "deep".
There are 19 hosts that all have overclocked CPUs 16GB ram and 1tb SSD's - no shared storage and a single pool master.
It's just consumer grade equipment in no-name rackmount cases (no ECC!)
The use case is a single VM per host as high performance build slaves for our software developers.
I'm the only Linux savvy support person and the minor hassles that I have encountered during upgrades mean that we could afford the time to do upgrades roughly yearly. (this is probably exacerbated by the lack of HA and shared storage in our setup).
As far as I could see on the Citrix website it would cost approx AUD$8500 p/year for security patches
Proxmox and oVirt are KVM based and as far as I can see the Xen project itself does not have a good gui for users. (I'm more familiar with Xen, but I'd be interested to hear why Jonathan thinks KVM is better).
To be clear, we would be happy paying for patches, but the per CPU licensing results in a non-viable price for what is meant to be a disposable cluster. (we have a VMware cluster with redundant everything for source code repository and other important stuff).