[CentOS] Vitualization and Partitioning

[Rudi Ahlers]

On Tue, Sep 13, 2011 at 1:52 AM, Thomas Dukes <tdukes at sc.rr.com> wrote:
>
>
>> -----Original Message-----
>> From: centos-bounces at centos.org
>> [mailto:centos-bounces at centos.org] On Behalf Of ken
>> Sent: Monday, September 12, 2011 12:36 AM
>> To: CentOS mailing list
>> Subject: Re: [CentOS] Vitualization and Partitioning
>>
>> On 09/11/2011 11:10 PM Emmanuel Noobadmin wrote:
>> > Hi,
>> >
>> >> When I do the install, do I or should I setup a separate partition
>> >> for guest
>> > That would be better from a performance point of view
>> >
>> >> OS's? From the redhat docs, it looks like the guest OS's reside at
>> >> /var/lib/libvirt/images/.
>> > This should be using files as disk files, which I did and
>> found it to
>> > be a problem when there is heavy I/O.
>>
>> I like LVM (for the reasons you cite).  Would you (anyone?)
>> say it's best to have one LV per guest or one LV for all guests?
>>
>>
>> tnx.
>
> I'm new to this but I would think you would want a separate LV for each
> guest. Seems I read somewhere, that you need one core per guest as well.
> That's why I'm opting for the Xeon processor rather than the iCore(x). Four
> cores v. two. More options.
>
> Can't believe this thread hasn't stirred more response. Maybe we all are in
> the learning phase.
>
> Eddie
>
> _______________________________________________

We use LVM on all our virtual hosting servers since it's much easier to manage.


You basically setup a PV volume spanning the whole drive(s), and then
a 10GB (or larger if you need to) LVM volume for /root, 10GB for /var,
2GB for /tmp & 5GB for /home.


Then for any VM's just add LVM volumes as needed, for example:

/dev/Volume001/vm1_root  - 10GB
/dev/Volume001/vm1_swap - 1GB


Another tip: Don't use the default LVM volume naming scheme, but
instead name the LVM volumes according to your server name, i.e.
server01 & server02. This way if server01's HDD crashes and you need
to mount it on server002 for recovery purposes, you won't have
conflicting LVM volumes


-- 
Kind Regards
Rudi Ahlers
SoftDux

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