Messages in this thread | | | Date | Wed, 29 Mar 2006 15:56:38 -0500 | From | Bill Davidsen <> | Subject | Re: [RFC] Virtualization steps |
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Sam Vilain wrote: > On Tue, 2006-03-28 at 09:41 -0500, Bill Davidsen wrote: >>> It is more than realistic. Hosting companies run more than 100 VPSs in >>> reality. There are also other usefull scenarios. For example, I know >>> the universities which run VPS for every faculty web site, for every >>> department, mail server and so on. Why do you think they want to run >>> only 5VMs on one machine? Much more! >> I made no commont on what "they" might want, I want to make the rack of >> underutilized Windows, BSD and Solaris servers go away. An approach >> which doesn't support unmodified guest installs doesn't solve any of my >> current problems. I didn't say it was in any way not useful, just not of >> interest to me. What needs I have for Linux environments are answered by >> jails and/or UML. > > We are talking about adding jail technology, also known as containers on > Solaris and vserver/openvz on Linux, to the mainline kernel. > > So, you are obviously interested! > > Because of course, you can take an unmodified filesystem of the guest > and assuming the kernels are compatible run them without changes. I > find this consolidation approach indispensible. > The only way to assume kernels are compatible is to run the same distro. Because vendor kernels are sure not compatible, even running a kernel.org kernel on Fedora (for instance) reveals the the utilities are also tweaked to expect the kernel changes, and you wind up with a system which feels like wearing someone else's hat. It's stable but little things just don't work right.
-- -bill davidsen (davidsen@tmr.com) "The secret to procrastination is to put things off until the last possible moment - but no longer" -me
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