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