So, you want to install a high-impact application on the OS running on
bare metal, and then run some lighter weight apps within virtual
machines on the same hardware? That is easily done, but can be a bit
cumbersome.
It might be less complex to just run all your apps on one physical
machine and use control groups to limit the lower impact apps than to
bring up multiple OS instances.
Thomas
On 02/23/2012 08:03 AM, hai wu wrote:
My question was probably not clear, I was asking for app install on
top of kvm's 'DOM0' physical (not a right word here, similar to xen
dom0), such as cpu intensive puppet app, then in kvm guest, we could
put lightweight things like apache, ldap servers, etc..
On 2/23/12, Thomas Cameron<[email protected]> wrote:
On 02/23/2012 03:30 AM, hai wu wrote:
This is not about RHEV, just plain KVM.
Are there any concerns when installing heavy app in RHEL6 KVM physical
host?
There are considerations, of course. You can get as granular or as broad
with tuning as you like. You can do things like use numactl and cpu
pinning and control groups and sriov to really drive as much performance
to the VM as possible. You want to do things like use virtio instead IDE
for storage and network, things like that.
Without more info about what you are going to do, it's really hard to
give you a real recommendation. What is the workload you're thinking of
virtualizing?
I've got one customer who is running numerous Windows 2008R2 machines
running workloads from file and print to Exchange to Sharepoint as KVM
guests, and it's working just fine.
TC
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