[CentOS] OT: Why VM?
Jim Wildman
jim at rossberry.com
Fri May 27 18:46:24 UTC 2011
Server utilization and seperation. I need 10 web servers, none of which
are going to be busy, but each organization in my business wants their
"own".
10 vms on a 2 cpu box makes more sense that 1 web server on each of ten.
Add a second vm host for some redundancy, etc, etc.
On Fri, 27 May 2011, Digimer wrote:
> On 05/27/2011 02:33 PM, James B. Byrne wrote:
>> I have been working off and on with Xen and KVM on a couple of test
>> hosts for that past year or so and while now everything seems to
>> function as expected, more or less, I find myself asking the
>> question: Why?
>>
>> We run our own servers at our own sites for our own purposes. We do
>> not, with a few small exceptions, host alien domains. So, while
>> rapidly provisioning or dynamically expanding a client's vm might be
>> very attractive to a public hosting provider that is not our
>> business model at all.
>>
>> Why would a small company not in the public hosting business choose
>> to employ VM technology? What are the benefits over operating
>> several individual small form factor servers or blades instead? I
>> am curious because what I can find on the net respecting VM use
>> cases, outside of for public providers or application testing, seems
>> to me mostly puff and smoke.
>>
>> This might be considered OT but since CentOS is what we use it seems
>> to me best that I ask here to start.
>
> Live migration between physical hosts. Also, ease of recovery in the
> event of a failure. Can move the VM to entirely new hardware when the
> old hardware is no longer powerful enough... etc.
>
>
----------------------------------------------------------------------
Jim Wildman, CISSP, RHCE jim at rossberry.com http://www.rossberry.net
"Society in every state is a blessing, but Government, even in its best
state, is a necessary evil; in its worst state, an intolerable one."
Thomas Paine
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