@msff-amman-itofficer said in Open Source Hypervisors: do we really have them? do we really need them?:
my take on this:
ESXi free is limited, 8 vcpu per VM and that limit can be easily reached limit.
It's easily reached if you starve a VM of IOPS or RAM and it's spinning cycles waiting on IO. In reality VERY few things need 8 vCPU. I've seen The ONLY exchange server for 5000 users not need that many resources.
Given modern Skylake hardware, and 4Ghz Intel Xeon Cores's if your hitting the 8vCPU limit I'm REALLY curious why your not willing to spend the one time ~$200 per host that is the Essentials bundle to get some more features is a rounding error in your budget (it's like less than a $1 a day per host).
Keep in mind it is not per hosts, but ~$600 per three hosts, so for much of the SMB that's either $300 or $600 per host and makes things like future upgrades potentially a problem. And $600 per host is enormous for the SMB market. Absolutely staggering. Given that 90% of the market can't even cost justify a server, let alone a server with that much additional licensing.
On a single host, how much value is that $600 getting an SMB versus getting free, unlimited use virtualization with $600 of faster hardware? When we are talking a $3,000 server, an extra $600 is anything but trivial.
The "only $200 per host" is really "holy crap, $200 per host with a minimum of three!!" That's not at all a small number, not in the SMB market. And especially not in an SMB market outside of the US.