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Old 05-04-2011, 08:58 AM
 
Default Centos under (vmware vs KVM)

Hello,

we are using several centos servers under Vmware. We are having more
and more requests for server space for each business application (let assume
that these business requests are for different type of services:
databases, web apps, application servers etc.

I wonder which solution is better:
1. new CentOS under vmware (having several CentOS servers under Vmware)
or
2. new CentOS under KVM under existing CentOS (having a few CentOS servers with several KVMs in each)
Each approach has some advantages and disadvantages.
Can you share your thoughts about it ?

Regards
Przemyslaw Bak (przemol)























































-----------------------------------------
Wez udzial w konkursie i WYGRAJ!
Sprawdz >> http://linkint.pl/f299e

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Old 05-04-2011, 09:11 AM
carlopmart
 
Default Centos under (vmware vs KVM)

On 05/04/2011 10:58 AM, przemolicc@poczta.fm wrote:
> Hello,
>
> we are using several centos servers under Vmware. We are having more
> and more requests for server space for each business application (let assume
> that these business requests are for different type of services:
> databases, web apps, application servers etc.
>
> I wonder which solution is better:
> 1. new CentOS under vmware (having several CentOS servers under Vmware)
> or
> 2. new CentOS under KVM under existing CentOS (having a few CentOS servers with several KVMs in each)
> Each approach has some advantages and disadvantages.
> Can you share your thoughts about it ?
>

What vmware version do you use: server, esxi?? What type of applications
do you run under these vms??


--
CL Martinez
carlopmart {at} gmail {d0t} com
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Old 05-04-2011, 10:04 AM
Jim Wildman
 
Default Centos under (vmware vs KVM)

On Wed, 4 May 2011, carlopmart wrote:

> On 05/04/2011 10:58 AM, przemolicc@poczta.fm wrote:
>> Hello,
>>
>> we are using several centos servers under Vmware. We are having more
>> and more requests for server space for each business application (let assume
>> that these business requests are for different type of services:
>> databases, web apps, application servers etc.
>>
>> I wonder which solution is better:
>> 1. new CentOS under vmware (having several CentOS servers under Vmware)
>> or
>> 2. new CentOS under KVM under existing CentOS (having a few CentOS servers with several KVMs in each)
>> Each approach has some advantages and disadvantages.
>> Can you share your thoughts about it ?
>>
>
> What vmware version do you use: server, esxi?? What type of applications
> do you run under these vms??
>

How mature is your organization?
How big will this get?

----------------------------------------------------------------------
Jim Wildman, CISSP, RHCE jim@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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Old 05-04-2011, 10:47 AM
Tom De Vylder
 
Default Centos under (vmware vs KVM)

On 04 May 2011, at 12:04, Jim Wildman wrote:

> On Wed, 4 May 2011, carlopmart wrote:
>
>> On 05/04/2011 10:58 AM, przemolicc@poczta.fm wrote:
>>> Hello,
>>>
>>> we are using several centos servers under Vmware. We are having more
>>> and more requests for server space for each business application (let assume
>>> that these business requests are for different type of services:
>>> databases, web apps, application servers etc.
>>>
>>> I wonder which solution is better:
>>> 1. new CentOS under vmware (having several CentOS servers under Vmware)
>>> or
>>> 2. new CentOS under KVM under existing CentOS (having a few CentOS servers with several KVMs in each)
>>> Each approach has some advantages and disadvantages.
>>> Can you share your thoughts about it ?
>>>
>>
>> What vmware version do you use: server, esxi?? What type of applications
>> do you run under these vms??
>>
>
> How mature is your organization?
> How big will this get?

And what about High Availability (vMotion, HA, DRS, ...) features?
Any of those in use in production yet? Would you need to have equivalents for those too?

Kind regards,
Tom De Vylder
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Old 05-04-2011, 03:36 PM
Johnny Hughes
 
Default Centos under (vmware vs KVM)

On 05/04/2011 03:58 AM, przemolicc@poczta.fm wrote:
> Hello,
>
> we are using several centos servers under Vmware. We are having more
> and more requests for server space for each business application (let assume
> that these business requests are for different type of services:
> databases, web apps, application servers etc.
>
> I wonder which solution is better:
> 1. new CentOS under vmware (having several CentOS servers under Vmware)
> or
> 2. new CentOS under KVM under existing CentOS (having a few CentOS servers with several KVMs in each)
> Each approach has some advantages and disadvantages.
> Can you share your thoughts about it ?

My thoughts are that KVM is part of the OS while VMWare is an addon. If
KVM can meet your needs (are all the physical servers vmx|svm
compatible, etc.), then I would go with KVM.

It is also much easier to script the creation of KVM VMs via things like
cobbler, etc.

If I were doing this, I would be doing it in KVM unless there was
something that made me require an external to the OS solution.

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Old 05-05-2011, 11:52 AM
 
Default Centos under (vmware vs KVM)

On Wed, May 04, 2011 at 06:04:44AM -0400, Jim Wildman wrote:
> On Wed, 4 May 2011, carlopmart wrote:
>
> > On 05/04/2011 10:58 AM, przemolicc@poczta.fm wrote:
> >> Hello,
> >>
> >> we are using several centos servers under Vmware. We are having more
> >> and more requests for server space for each business application (let assume
> >> that these business requests are for different type of services:
> >> databases, web apps, application servers etc.
> >>
> >> I wonder which solution is better:
> >> 1. new CentOS under vmware (having several CentOS servers under Vmware)
> >> or
> >> 2. new CentOS under KVM under existing CentOS (having a few CentOS servers with several KVMs in each)
> >> Each approach has some advantages and disadvantages.
> >> Can you share your thoughts about it ?
> >>
> >
> > What vmware version do you use: server, esxi?? What type of applications
> > do you run under these vms??
> >
>
> How mature is your organization?
> How big will this get?

Why ?
I thought about technical comparison of both approaches.
Then having it you can see if this particular approach is suitable for you.

Regards
Przemyslaw Bak (przemol)



















































----------------------------------------------------------------
Najwieksza baza ogloszen motoryzacyjnych!
Sprawdz >> http://linkint.pl/f29ac

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Old 05-05-2011, 11:58 AM
carlopmart
 
Default Centos under (vmware vs KVM)

On 05/05/2011 01:52 PM, przemolicc@poczta.fm wrote:
>>>>
>>>
>>> What vmware version do you use: server, esxi?? What type of applications
>>> do you run under these vms??
>>>
>>
>> How mature is your organization?
>> How big will this get?
>
> Why ?
> I thought about technical comparison of both approaches.
> Then having it you can see if this particular approach is suitable for you.
>
> Regards
> Przemyslaw Bak (przemol)
>

Which type of comporasion do you need??

- How many vms supports each one??
- How many nodes can install inside a cluster??
- How many ram can I assign to a vm??

- Hard and soft limits on both platforms???
- What type of storage is supported on both platforms???

......


--
CL Martinez
carlopmart {at} gmail {d0t} com
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Old 05-05-2011, 12:24 PM
 
Default Centos under (vmware vs KVM)

On Thu, May 05, 2011 at 01:58:04PM +0200, carlopmart wrote:
> On 05/05/2011 01:52 PM, przemolicc@poczta.fm wrote:
> >>>>
> >>>
> >>> What vmware version do you use: server, esxi?? What type of applications
> >>> do you run under these vms??
> >>>
> >>
> >> How mature is your organization?
> >> How big will this get?
> >
> > Why ?
> > I thought about technical comparison of both approaches.
> > Then having it you can see if this particular approach is suitable for you.
> >
> > Regards
> > Przemyslaw Bak (przemol)
> >
>
> Which type of comporasion do you need??

Well, it seems that Best Practise would be better name for what I am looking for :-)

> - How many vms supports each one??

I am looking for information like below:
- when you use KVM using more KVM VMs then X is not advisable since ...

> - How many nodes can install inside a cluster??
> - How many ram can I assign to a vm??

As many as appliaction need.

> - Hard and soft limits on both platforms???
> - What type of storage is supported on both platforms???

In general when you have many OS-es (CentOS) you face following problems:
- how to keep up with package updates ?
- how about security - is it easier to manage many CentOS-es or just one with many KVMs ?
- how to keep up with application maintenance (mysql, postgresql, apache, dns, etc) ?
Which approach would be better/easier ?


Regards
Przemyslaw Bak (przemol)



















































----------------------------------------------------------------------
Mamy je -rozwiazania z j.polskiego!
http://linkint.pl/f29a8

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Old 05-05-2011, 12:39 PM
carlopmart
 
Default Centos under (vmware vs KVM)

On 05/05/2011 02:24 PM, przemolicc@poczta.fm wrote:
> On Thu, May 05, 2011 at 01:58:04PM +0200, carlopmart wrote:
>> On 05/05/2011 01:52 PM, przemolicc@poczta.fm wrote:
>>>>>>
>>>>>
>>>>> What vmware version do you use: server, esxi?? What type of applications
>>>>> do you run under these vms??
>>>>>
>>>>
>>>> How mature is your organization?
>>>> How big will this get?
>>>
>>> Why ?
>>> I thought about technical comparison of both approaches.
>>> Then having it you can see if this particular approach is suitable for you.
>>>
>>> Regards
>>> Przemyslaw Bak (przemol)
>>>
>>
>> Which type of comporasion do you need??
>
> Well, it seems that Best Practise would be better name for what I am looking for :-)

Best practice?? I don't think so ... You need to choose between two
different virtualization products. And the principal point here is: your
budget and your SLA.

>
>> - How many vms supports each one??
>
> I am looking for information like below:
> - when you use KVM using more KVM VMs then X is not advisable since ...
>
>> - How many nodes can install inside a cluster??
>> - How many ram can I assign to a vm??
>
> As many as appliaction need.

It depends. There isn't a magic formula to accomplish this.
>
>> - Hard and soft limits on both platforms???
>> - What type of storage is supported on both platforms???
>
> In general when you have many OS-es (CentOS) you face following problems:
> - how to keep up with package updates ?
Like in physical world...

> - how about security - is it easier to manage many CentOS-es or just one with many KVMs ?
It's the same. But security is another beast.... You can't control your
virtual infrastructure like you do in physical world ... Virtual
infrastructures are more vulnerable ...

> - how to keep up with application maintenance (mysql, postgresql, apache, dns, etc) ?
Same as you do in physical world.

> Which approach would be better/easier ?

Between what?? vmware and kvm?? In your case, KVM is the best option if
all vms are centos.

>
>



--
CL Martinez
carlopmart {at} gmail {d0t} com
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