Re: ATA over Ethernet (aoe) Experience?

["Kristian Erik Hermansen" <user=152@nabble.blu.org>]

 Check out kernel virtual machine, aka kvm... 



On 7/12/08, Kent Borg <[hidden email]> wrote: 
> Kristian Erik Hermansen wrote: 
>> Cool idea, and please let us know if you implement it and the result 
>> works.  But I feel compelled to also point you to vmware's vmotion 
>> product :-) 
>> 
> 
> Looking quickly at Vmotion it seems that Vmotion starts out requiring a 
> box to serve up disks  I am only being medium ambitious here.  I want to 
> have two identical servers that can stand in for each other with no 
> single points of failure.  Put some central disk server in the mix and I 
> start to want two of them in case one dies.  The cost of minimal 
> hardware of a completely redundant system goes up by thousands. 
> 
> (Also, Vmware always ignores the resumes I send them.  If they don't 
> like me, I am not so enthusiastic about them.) 
> 
> 
> A point on motivation: Upgrading software.  Say the host OS needs an 
> upgrade, or the virtualization software itself has a new revision. 
> Those are cases where the whole world might really be happier with a 
> reboot of the guest.  Vmotion seems to be a load balancing feature. 
> Trying a live migration for an upgrade seems greedy.  In those cases I 
> think it is reasonable to reboot the guest OS.  Yes, you can't do many 
> reboots and still do "five-nines", but people who think they have that 
> reliability are usually fooling themselves.  A little scheduled downtime 
> is usually something that can be arranged, and a system that assumes a 
> reboot is occasionally allowed can be so much simplier--and simplicity 
> breeds reliability. 
> 
> 
> -kb, the Kent who is coming around to thinking Virtualbox is pretty damn 
> cool. 
> 
> 
> P.S.  It is still annoying that only one copy of Virtualbox can be 
> installed at once on a host machine.  Qemu doesn't have that 
> limitation...though in the 
> most recent copy of Qemu that I have tried dereferencing a -1 kills the 
> entire guest OS.  Yes, really. 
>