Ahmed Kamal wrote:
Since VMware just released ESXi as a free download (not open-source
though), I was wondering if any of you guys had done a study on the
performance of ESXi vs Xen ? Of course I could locate lots of marketing
bable how each product is claiming to have the best "architecture" and
all .. but I'm looking for a real opinion
The big value delivered by VMware is the management interface and tools
provided by VMware Virtual Center (VC). VC is not free and makes ESX3i
relatively worthless without it.
I would suggest that you don't use ESX3i in production unless you meet
the following criteria:
* you have shared storage
* you plan to purchase virtual center
* you have SQL server or Oracle (only 2 supported DB vendors)
It makes a lot of sense for VMware to release ESX3i as a free product
since the value-add is Virtual Center to obtain live migration, high
availability, dynamic resource scheduling, patch management for windows
hosts, etc...
Also, to address your original question of performance, Xen is a
para-virtualization technology while VMware provides a hyper-visor.
Para-virtualization occurs when the guest is modified to run on the host
OS where hypervisors simply present the equivalent of virtual bare-metal
to the virtualization guests.
I have no direct comparisons myself but I would expect to see greater
performance in a para-virtualized scenario.
Regards,
--
Josh Miller, RHCE/VCP
Seattle, WA
Linux Solutions Provider
http://itsecureadmin.com/
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