----- Original Message ----- From: "Todd Walton" <[EMAIL PROTECTED]> To: "Main Discussion List for KPLUG" <[email protected]> Subject: Re: mtbf and VM's ....................??? Date: Fri, 17 Jun 2005 12:55:50 -0700
> > On 6/17/05, Randall Shimizu <[EMAIL PROTECTED]> wrote: > > > > ----- Original Message ----- > > From: "Randall Shimizu" <[EMAIL PROTECTED]> > > To: [EMAIL PROTECTED] > > Subject: mtbf and VM's ....................??? > > Date: Fri, 17 Jun 2005 10:56:12 -0800 > > It'd be nice if you'd cut and paste just the text, and not the quotes > and headers and stuff. It's an eyesore. > > > I was wondering if anyone has heard what the mtbf of a VM > > is......??? Now I am sure there is number of variables that come > > into play. A hardware based hypervisor such as ESX or IBM's rHype > > will increase reliability............ > > What exactly does a hypervisor do? > > > VM failover is one feature that is still lacking in the x86 VM arena.... There could be a issue of memory corruption and or page faults.... Another thing to remember is when one runs a VM the ring zero is emulated on other VM OS's. Clustering does sound like a good solution since the VM's use IP to identify each instance. Hypervisor: (Wikipedia) A Hypervisor is software which runs on a hardware machine and manages one or more operating systems. > > I would think that if you had systems that were sufficiently similar > to each other that they could pick up each other's work, then they > would suffer the same problems. With failover between different, > non-virtual machines, you can guard against hardware-related failures. > But with VMs, not only are the OS's likely to be the same or very > similar, but the hardware they're running on is the same! What would > cause one VM to fail, but not afflict its sibling? > > (It's not a rhetorical question.) > > And, for another question: why couldn't you apply to virtual machines > the same clustering methods you'd use for non-virtuals? Wouldn't, > say, openMosix work? > > -todd > > > -- > [email protected] > http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list -- ___________________________________________________________ Sign-up for Ads Free at Mail.com http://promo.mail.com/adsfreejump.htm -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
