[HCoop-Discuss] Our ideal architecture?

[Adam Chlipala]

David Snider wrote:
> Operating System Level Virtualization: (Ex. OpenVZ, FreeBSD Jails, Solaris
> Containers) The name "jail" that FreeBSD makes it pretty clear what this
> does. Each server shares an underlying operating system but it is
> partitioned in such a way to make it look and feel like it is on it's own
> server. The advantage to this is that you don't have to duplicate a lot of
> commonly shared resources. The disadvantage is that it is difficult to
> control individual utilization of each server. (I.E If your web server is
> getting hammered your mail server's performance suffers too.)
>   

This last disadvantage, if accurate, kills the attractiveness of the 
approach for me.  docelic, do you agree that OpenVZ has this problem?  
If so, why do you think OpenVZ would still be a good choice for us?