Here is some info: http://myvirtualcloud.net/?p=1155
This is for VMware View which could be approximated to VCL. There is also limits per VMFS datastore (if you not using NFS). I have seen different recommendations for VM number per ESXi host per shared VMFS - VMWare recommends 16 VMs per Host for shared VMFS for VMFS-v3. What hypervisor do use for VCL? Thanks. -- Thank you, Dmitri Chebotarov Virtual Computing Lab Systems Engineer, TSD - Ent Servers & Messaging 223 Aquia Building, Ffx, MSN: 1B5 Phone: (703) 993-6175 Fax: (703) 993-3404 On Thursday, May 24, 2012 at 11:42 , Young h Oh wrote: > Normally, you can calculate the average number of VMs depends on the > computing power (CPU). For example, 1 physical core can supports 2 VMs with 2 > GB RAM. If you have 2 CPUs with 16 cores, then you might run 32VMs with 64GB > RAM. However, the max number of VMs per host depends on variable facts as Al > Quiros mentioned, In addition to Al's comments, you might also consider the > application you want to run on guest VMs. If applications are more > computation intensive, the number of CPUs would be important fact to decide > the max number of VMs per host. > > In our environment, we don't use VMware but running RHEL 6 x64 with KVM on > IBM blade hosts with 16 CPUs and 24GB RAM. We run average 15 Windows XP VMs > with 1GB memory without much performance overhead. However, we can run up to > 22 VMs but the performance was not good. > > Best regards, > -------------------------------------------------------------------- > Young Hyun Oh > IBM Tivoli > > Evelio Quiros ---05/24/2012 10:58:12 AM---Hello, As you know, the number of > Virtual Machines per host depends on available resources (CPU, RAM > > From: Evelio Quiros <evq...@fiu.edu (mailto:evq...@fiu.edu)> > To: "vcl-user@incubator.apache.org (mailto:vcl-user@incubator.apache.org)" > <vcl-user@incubator.apache.org (mailto:vcl-user@incubator.apache.org)>, > "'vcl-...@incubator.apache.org (mailto:vcl-...@incubator.apache.org)'" > <vcl-...@incubator.apache.org (mailto:vcl-...@incubator.apache.org)>, > Date: 05/24/2012 10:58 AM > Subject: Re: Max Number of VMs per Host > > > > Hello, > > As you know, the number of Virtual Machines per host depends on available > resources (CPU, RAM, Disk), as well as the demands of the image. > As a general guide, I have found the following to be reasonable. Other > admins, please share your opinions. > > For a single VM host with 12 virtual CPU and 98 GB RAM, I typically allocate > 25 Windows VM. When necessary, I have raised it to 32 Windows XP machines. > For linux based images, I have used 50 VM without issues. Monitor the > performance tab on your vSphere client to see if the host is over-worked. > On Virtual Machines that require higher performance, I usually will not place > them on a host with more than 10 working VM. But the most important thing is > to watch the performance closely. You will get a feel for how many VM per > host by experience. > As always, your mileage may vary. > > Regards, > Al Quiros > Florida International University > > > From: <Sanders>, Arbin D <asand...@nccu.edu (mailto:asand...@nccu.edu)> > Reply-To: "vcl-user@incubator.apache.org > (mailto:vcl-user@incubator.apache.org)" <vcl-user@incubator.apache.org > (mailto:vcl-user@incubator.apache.org)> > Date: Wednesday, May 23, 2012 3:53 PM > To: "'vcl-...@incubator.apache.org (mailto:'vcl-...@incubator.apache.org)'" > <vcl-...@incubator.apache.org (mailto:vcl-...@incubator.apache.org)>, > "'vcl-user@incubator.apache.org (mailto:'vcl-user@incubator.apache.org)'" > <vcl-user@incubator.apache.org (mailto:vcl-user@incubator.apache.org)> > Subject: Max Number of VMs per Host > > All, > > What is the number of VMs do you all run per VMware host? Is it limited to > the RAM limitation for vSphere 5? How many purchase vSphere licenses? > > Arbin Darren Sanders > > IT Manager – Academic Computing > North Carolina Central University > 712 Cecil Street > Suite 3014 > Durham, NC 27707 > 919.530.6307 > 919.530.5097 (Fax) > > For the Latest ITS Updates and Tips Join Us Online > > CONFIDENTIALITY: This email (including any attachments) may contain > confidential, proprietary and privileged information, and unauthorized > disclosure or use is prohibited. If you received this email in error, please > notify the sender and delete this e-mail from your system. > > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please visit http://www.symanteccloud.com > (http://www.symanteccloud.com/) > ______________________________________________________________________ > > >
