I'm simply stating that if you use Xen, you can hot migrate the service and keep it running. If you must update/upgrade services users are using on the virtual image (Firefox, etc), then yes, Xen is overkill and adds complexity. In some cases, downtime is unavoidable.
-brandon On Tue, Jun 16, 2009 at 11:44 PM, John Summerfield < deb...@herakles.homelinux.org> wrote: > Brandon Galbraith wrote: > >> Or run your services/calculations in a VM on Xen that you can snapshot, >> upgrade the host, and then bring the VMs back up. There are some things >> you >> just can't get around (like reboots for core components). >> > > That adds a layer of complexity, where's the benefit? Real or virtual, > there's still a system "in need of rebooting" if maintenance is applied. > > > > >> -brandon >> >> On Mon, Jun 15, 2009 at 12:16 PM, John Summerfield < >> deb...@herakles.homelinux.org> wrote: >> >> Dr Andrew C Aitchison wrote: >>> >>> What do other groups do about updating applications and machines >>>> with long running processes ? >>>> >>> > There are people who use beowulf clusters, mosix and, I was going to > mention, openmosix, but the project is defunct). > > > > -- > > Cheers > John > > -- spambait > 1aaaa...@coco.merseine.nu z1aaaa...@coco.merseine.nu > -- Advice > http://webfoot.com/advice/email.top.php > http://www.catb.org/~esr/faqs/smart-questions.html<http://www.catb.org/%7Eesr/faqs/smart-questions.html> > http://support.microsoft.com/kb/555375 > > You cannot reply off-list:-) > -- Brandon Galbraith Mobile: 630.400.6992 FNAL: 630.840.2141
