I'm not sure about KVM. I use Xen 5.6 SP2 and 6.0.3 Sorry about that.
On Thu, Oct 25, 2012 at 10:03 PM, Julien Garet <[email protected]>wrote: > > De: "JoonHyun Pac" <[email protected]> > > À: [email protected] > > Envoyé: Jeudi 25 Octobre 2012 14:34:47 > > Objet: Re: maximum hosts per cluster > > > Cloudstack will not communicate with each hosts but pool master. > > That's why you should avoid many hosts in one pool. > > > In our environment, 16 hosts in one pool cause serious load to master > > host > > and XAPI works done pretty slowly than 8 hosts pool. > > Do you know if this limit also applies with KVM ? I understand that there > could be a problem with Xenserver and the master host in pools, but there > should not be such a kind of limits with kvm, every thing is operated from > the cloud controller and there is no "cluster" seen from KVM, no ? > > > Thanks, > > > Joonhyun Pac > > > On Thu, Oct 25, 2012 at 9:13 PM, Julien Garet <[email protected]> > > wrote: > > > > > De: "JoonHyun Pac" <[email protected]> > > > > À: [email protected] > > > > Envoyé: Jeudi 25 Octobre 2012 12:59:50 > > > > Objet: Re: maximum hosts per cluster > > > > > > > The limit of hosts are 16 but it's too big for just one master > > > > host. > > > > I'm using 8 hosts per cluster and it works fine. > > > What happens if you have 16 hosts ? What's the difference from the > > > cloud > > > controller to have 16 hosts in one cluster or 16 hosts in two > > > clusters of 8. > > > > > > > On Thu, Oct 25, 2012 at 5:59 PM, Julien Garet > > > > <[email protected]> > > > > wrote: > > > > > > > > Hello, > > > > > > > > > > > > > > > Still in deployment planning, I am wondering how much hosts > > > > > should > > > > > I put > > > > > in a single cluster ? I am using Cloudstack 3.0.2 with KVM on > > > > > CentOS 6.2 > > > > > hosts. > > > > > > > > > > > > > > > What are the advantages and drawbacks of putting hosts in the > > > > > same > > > > > cluster > > > > > ? > > > > > > > > > > > > > > > From what I see, if I am in the same cluster, I can migrate > > > > > instances > > > > > between hosts, what I can not do between different clusters, I > > > > > can > > > > > also > > > > > migrate primary storage. > > > > > > > > > > > > > > > What happens if I had more than 16 hosts in a KVM cluster (16 > > > > > seems > > > > > to be > > > > > the limit from the advanced install guide). > > > > > > > > > > > > > > > I am using iSCSI luns as primary storage and Dell C6220 servers > > > > > (4 > > > > > servers > > > > > in 2U chassis, sharing power input). I thought first I would > > > > > divide > > > > > each > > > > > chassis in its own cluster, but, from management side, I need > > > > > to > > > > > create a > > > > > new lun for every chassis. If I need to do some operations on a > > > > > chassis, I > > > > > need to put all servers in the cluster in maintenance mode, but > > > > > it > > > > > seems I > > > > > can't do that ! At least one server should be up, no ? > > > > > > > > > > > > > > > Any advice would be greatly appreciated > > > > > > > > > > > > > > > ------ > > > > > Attention, changement d'adresse et de numéro de téléphone ! > > > > > Julien GARET > > > > > DSI / SESI > > > > > Bureau B201 > > > > > Inria Lille-Nord Europe > > > > > Bâtiment B, 6 rue Heloise > > > > > 59650 Villeneuve d'Ascq > > > > > téléphone: 03.59.35.86.86 > > > > > portable: 06.79.88.10.47 > > > > > > > > >
