Roberto Scudeller
2011-Apr-05 19:57 UTC
[Xen-users] what''s the number of VM (running) in same time in Xen?
Hi all, Can anyone help me? What''s the maximum number of VM? What''s the limit? Exist limits? Thanks for any report. -- Roberto Scudeller _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Miles Fidelman
2011-Apr-05 23:50 UTC
Re: [Xen-users] what''s the number of VM (running) in same time in Xen?
Roberto Scudeller wrote:> Hi all, > > Can anyone help me? What''s the maximum number of VM? > What''s the limit? Exist limits?The simple answer: The first limit is memory, the second is CPU cycles, after that probably i/o bandwidth. The more you have, the more VMs you can run. Miles Fidelman -- In theory, there is no difference between theory and practice. In<fnord> practice, there is. .... Yogi Berra _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Joseph Glanville
2011-Apr-07 07:59 UTC
Re: [Xen-users] what''s the number of VM (running) in same time in Xen?
Hi Roberto, As Miles stated memory is the first and foremost limit, I would argue the second is definitely storage IO, particarly IOPS, IO operations per second. If your machine is forever waiting for disk (as most workloads require disk interaction) you can''t make good use of either memory or CPU. CPUs being so large these days the majority of usecases will not bottelneck on pure CPU. I think Xen does have some internal limits but they are so large it really isn''t worth mentioning them. Joseph. On 6 April 2011 09:50, Miles Fidelman <mfidelman@meetinghouse.net> wrote:> Roberto Scudeller wrote: >> >> Hi all, >> >> Can anyone help me? What''s the maximum number of VM? >> What''s the limit? Exist limits? > > The simple answer: > > The first limit is memory, the second is CPU cycles, after that probably i/o > bandwidth. The more you have, the more VMs you can run. > > Miles Fidelman > > -- > In theory, there is no difference between theory and practice. > In<fnord> practice, there is. .... Yogi Berra > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >-- Kind regards, Joseph. Founder | Director Orion Virtualisation Solutions | www.orionvm.com.au | Phone: 1300 56 99 52 | Mobile: 0428 754 846 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users