[CentOS] Centos under (vmware vs KVM)

Thu May 5 12:39:56 UTC 2011
carlopmart <carlopmart at gmail.com>

On 05/05/2011 02:24 PM, przemolicc at poczta.fm wrote:
> On Thu, May 05, 2011 at 01:58:04PM +0200, carlopmart wrote:
>> On 05/05/2011 01:52 PM, przemolicc at 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