Re: Max Number of VMs per Host
On Wed, May 23, 2012 at 03:53:01PM -0400, Sanders, Arbin D wrote: 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? Hello there, at our University computing centre we have 3 VMware ESXi 4.1 hosts. Each host has 6 quad-core CPUs (alltogether 24 cores) and 256 GB RAM. Each VM has 2 GB and 1 vCPU. We have made several stress tests (each VM with Bonnie++) and we have successfully started 100 VMs per one host. Best regards, Ivan Rako University Computing Centre University of Zagreb, Croatia -- You only live once, and if you play it right, once is all you need.
Re: Max Number of VMs per Host
True, would be interesting to compare other supported hypervisors to ESXi. With limits in ESXi 5.0 free versions many will be looking for alternative hypervisors. I remember seeing support for Xen in future VCL releases - does it include Xen Cloud Platform (XCP) and XenServer 5.6/6 ? -- 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 21:03 , Sanders, Arbin D wrote: How about other hypervisors? KVM limits? Arbin D. Sanders Sent from my Motorola Smartphone on the Now Network from Sprint! -Original message- From: Dmitri Chebotarov dcheb...@gmu.edu (mailto:dcheb...@gmu.edu) To: vcl-user@incubator.apache.org (mailto:vcl-user@incubator.apache.org) vcl-user@incubator.apache.org (mailto:vcl-user@incubator.apache.org) Cc: 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) Sent: Thu, May 24, 2012 17:54:59 EDT Subject: Re: Max Number of VMs per Host This link may be helpful http://kb.vmware.com/selfservice/microsites/search.do?language=en_UScmd=displayKCexternalId=2000935 On May 24, 2012, at 5:32 PM, Alexander Patterson alexander.patter...@csueastbay.edu (mailto:alexander.patter...@csueastbay.edu) wrote: I'm not sure from what I have been reading, might want to contact your VMware Rep and see what they can do if you plan on upgrading to 5. WIth ESXI 4.1 Infrastructure limitations Some limitations in ESX Server 4 may constrain the design of data centers: Guest system maximum RAM: 255 GB Host system maximum RAM: 1 TB[ Number of hosts in a high availability cluster: 32 Number of Primary Nodes in ESX Cluster high availability: 5 Number of hosts in a Distributed Resource Scheduler cluster: 32 Maximum number of processors per virtual machine: 8 Maximum number of processors per host: 160 Maximum number of cores per processor: 12 Maximum number of virtual machines per host: 320 VMFS-3 limits files to 262,144 (218) blocks, which translates to 256 GB for 1 MB block sizes (the default) or up to 2 TB for 8 MB block sizes.However, on a VMFS Boot drive, it is usually very difficult to use anything other than 1 MB Block size With ESXI 5 there has been some changes to these limits Guest system maximum RAM: 1 TB Host system maximum RAM: 2 TB Number of hosts in a high availability cluster: 32 Maximum number of processors per virtual machine: 32 Maximum number of processors per host: 160 Maximum number of cores per processor: 25 Maximum number of virtual machines per host: 512 VMFS-3 is supported and has the same limits as before VMFS-5 however has a max volume size of 64 TB and a max file size of 2 TB - 512 B How much vRAM does a VMware vSphere Hypervisor license provide? vSphere Hypervisor license provides a vRAM entitlement of 32GB per server, regardless of the number of physical processors. vSphere Hypervisor can be used on servers with maximum physical RAM capacity of 32GB. On Thu, May 24, 2012 at 2:20 PM, Sanders, Arbin D asand...@nccu.edu (mailto:asand...@nccu.edu) wrote: Alexander, What if I use the paid version of vSphere5? And I have 96 GB of memory? Could I get more than 20 VMs? 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. -Original Message- From: Alexander Patterson [mailto:alexander.patter...@csueastbay.edu] Sent: Thursday, May 24, 2012 5:17 PM To: vcl-...@incubator.apache.org (mailto:vcl-...@incubator.apache.org) Cc: vcl-user@incubator.apache.org (mailto:vcl-user@incubator.apache.org) Subject: Re: Max Number of VMs per Host Hello, ESXI 5 is limit by licenses with the amount of ram you can run on each machine. The 8 GB vRAM limit is for the upcoming 5.0 free Hypervisor, the 4.x version had no such memory limits. VM makes you pay now if you want to use X amount of ram per host with the upcoming version. Making 4.1 I Free Version a much more attractive option to go with We have each of our blades running ESXI 4.1 with 16 Cores and 48 GB of ram and we have 20
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.edumailto:asand...@nccu.edu Reply-To: vcl-user@incubator.apache.orgmailto:vcl-user@incubator.apache.org vcl-user@incubator.apache.orgmailto:vcl-user@incubator.apache.org Date: Wednesday, May 23, 2012 3:53 PM To: 'vcl-...@incubator.apache.orgmailto:'vcl-...@incubator.apache.org' vcl-...@incubator.apache.orgmailto:vcl-...@incubator.apache.org, 'vcl-user@incubator.apache.orgmailto:'vcl-user@incubator.apache.org' vcl-user@incubator.apache.orgmailto: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[Description: Description: Description: Description: cid:image003.png@01CB6AD0.97665900] http://www.facebook.com/profile.php?id=66100342#!/pages/Durham-NC/NCCU-Eagle-Technical-Assistance-Center-ETAC/249508718552?v=info [Description: Description: Description: Description: cid:image004.png@01CB6AD0.97665900] http://twitter.com/NCCUETAC 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 __ attachment: image001.pngattachment: image002.png
Re: Max Number of VMs per Host
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 From: Evelio Quiros evq...@fiu.edu To: vcl-user@incubator.apache.org vcl-user@incubator.apache.org, 'vcl-...@incubator.apache.org' 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 Reply-To: vcl-user@incubator.apache.org vcl-user@incubator.apache.org Date: Wednesday, May 23, 2012 3:53 PM To: 'vcl-...@incubator.apache.org' vcl-...@incubator.apache.org, 'vcl-user@incubator.apache.org' 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 __ inline: graycol.gif
Re: Max Number of VMs per Host
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/) __
Re: Max Number of VMs per Host
Hello, ESXI 5 is limit by licenses with the amount of ram you can run on each machine. The 8 GB vRAM limit is for the upcoming 5.0 free Hypervisor, the 4.x version had no such memory limits. VM makes you pay now if you want to use X amount of ram per host with the upcoming version. Making 4.1 I Free Version a much more attractive option to go with We have each of our blades running ESXI 4.1 with 16 Cores and 48 GB of ram and we have 20 VM's per blade but we give 1.5 GB of ram to each VM. More info here http://kb.vmware.com/selfservice/microsites/search.do?language=en_UScmd=displayKCexternalId=1014006 -Alex On Thu, May 24, 2012 at 2:09 PM, Sanders, Arbin D asand...@nccu.edu wrote: I am planning on using a free version of vSphere 5 depending on the how many VMs I can get. I would like to get 50 VMs per host. 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. From: Dmitri Chebotarov [mailto:dcheb...@gmu.edu] Sent: Thursday, May 24, 2012 12:01 PM To: vcl-...@incubator.apache.org Cc: vcl-user@incubator.apache.org Subject: Re: Max Number of VMs per Host 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 To: vcl-user@incubator.apache.org vcl-user@incubator.apache.org, 'vcl-...@incubator.apache.org' 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 Reply-To: vcl-user@incubator.apache.org vcl-user@incubator.apache.org Date: Wednesday, May 23, 2012 3:53 PM To: 'vcl-...@incubator.apache.org' vcl-...@incubator.apache.org, 'vcl-user@incubator.apache.org' 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
Re: Max Number of VMs per Host
I'm not sure from what I have been reading, might want to contact your VMware Rep and see what they can do if you plan on upgrading to 5. WIth ESXI 4.1 Infrastructure limitations Some limitations in ESX Server 4 may constrain the design of data centers: Guest system maximum RAM: 255 GB Host system maximum RAM: 1 TB[ Number of hosts in a high availability cluster: 32 Number of Primary Nodes in ESX Cluster high availability: 5 Number of hosts in a Distributed Resource Scheduler cluster: 32 Maximum number of processors per virtual machine: 8 Maximum number of processors per host: 160 Maximum number of cores per processor: 12 Maximum number of virtual machines per host: 320 VMFS-3 limits files to 262,144 (218) blocks, which translates to 256 GB for 1 MB block sizes (the default) or up to 2 TB for 8 MB block sizes.However, on a VMFS Boot drive, it is usually very difficult to use anything other than 1 MB Block size With ESXI 5 there has been some changes to these limits Guest system maximum RAM: 1 TB Host system maximum RAM: 2 TB Number of hosts in a high availability cluster: 32 Maximum number of processors per virtual machine: 32 Maximum number of processors per host: 160 Maximum number of cores per processor: 25 Maximum number of virtual machines per host: 512 VMFS-3 is supported and has the same limits as before VMFS-5 however has a max volume size of 64 TB and a max file size of 2 TB - 512 B How much vRAM does a VMware vSphere Hypervisor license provide? vSphere Hypervisor license provides a vRAM entitlement of 32GB per server, regardless of the number of physical processors. vSphere Hypervisor can be used on servers with maximum physical RAM capacity of 32GB. On Thu, May 24, 2012 at 2:20 PM, Sanders, Arbin D asand...@nccu.edu wrote: Alexander, What if I use the paid version of vSphere5? And I have 96 GB of memory? Could I get more than 20 VMs? 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. -Original Message- From: Alexander Patterson [mailto:alexander.patter...@csueastbay.edu] Sent: Thursday, May 24, 2012 5:17 PM To: vcl-...@incubator.apache.org Cc: vcl-user@incubator.apache.org Subject: Re: Max Number of VMs per Host Hello, ESXI 5 is limit by licenses with the amount of ram you can run on each machine. The 8 GB vRAM limit is for the upcoming 5.0 free Hypervisor, the 4.x version had no such memory limits. VM makes you pay now if you want to use X amount of ram per host with the upcoming version. Making 4.1 I Free Version a much more attractive option to go with We have each of our blades running ESXI 4.1 with 16 Cores and 48 GB of ram and we have 20 VM's per blade but we give 1.5 GB of ram to each VM. More info here http://kb.vmware.com/selfservice/microsites/search.do?language=en_UScmd=displayKCexternalId=1014006 -Alex On Thu, May 24, 2012 at 2:09 PM, Sanders, Arbin D asand...@nccu.edu wrote: I am planning on using a free version of vSphere 5 depending on the how many VMs I can get. I would like to get 50 VMs per host. 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. From: Dmitri Chebotarov [mailto:dcheb...@gmu.edu] Sent: Thursday, May 24, 2012 12:01 PM To: vcl-...@incubator.apache.org Cc: vcl-user@incubator.apache.org Subject: Re: Max Number of VMs per Host 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
Re: Max Number of VMs per Host
This link may be helpful http://kb.vmware.com/selfservice/microsites/search.do?language=en_UScmd=displayKCexternalId=2000935 On May 24, 2012, at 5:32 PM, Alexander Patterson alexander.patter...@csueastbay.edu wrote: I'm not sure from what I have been reading, might want to contact your VMware Rep and see what they can do if you plan on upgrading to 5. WIth ESXI 4.1 Infrastructure limitations Some limitations in ESX Server 4 may constrain the design of data centers: Guest system maximum RAM: 255 GB Host system maximum RAM: 1 TB[ Number of hosts in a high availability cluster: 32 Number of Primary Nodes in ESX Cluster high availability: 5 Number of hosts in a Distributed Resource Scheduler cluster: 32 Maximum number of processors per virtual machine: 8 Maximum number of processors per host: 160 Maximum number of cores per processor: 12 Maximum number of virtual machines per host: 320 VMFS-3 limits files to 262,144 (218) blocks, which translates to 256 GB for 1 MB block sizes (the default) or up to 2 TB for 8 MB block sizes.However, on a VMFS Boot drive, it is usually very difficult to use anything other than 1 MB Block size With ESXI 5 there has been some changes to these limits Guest system maximum RAM: 1 TB Host system maximum RAM: 2 TB Number of hosts in a high availability cluster: 32 Maximum number of processors per virtual machine: 32 Maximum number of processors per host: 160 Maximum number of cores per processor: 25 Maximum number of virtual machines per host: 512 VMFS-3 is supported and has the same limits as before VMFS-5 however has a max volume size of 64 TB and a max file size of 2 TB - 512 B How much vRAM does a VMware vSphere Hypervisor license provide? vSphere Hypervisor license provides a vRAM entitlement of 32GB per server, regardless of the number of physical processors. vSphere Hypervisor can be used on servers with maximum physical RAM capacity of 32GB. On Thu, May 24, 2012 at 2:20 PM, Sanders, Arbin D asand...@nccu.edu wrote: Alexander, What if I use the paid version of vSphere5? And I have 96 GB of memory? Could I get more than 20 VMs? 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. -Original Message- From: Alexander Patterson [mailto:alexander.patter...@csueastbay.edu] Sent: Thursday, May 24, 2012 5:17 PM To: vcl-...@incubator.apache.org Cc: vcl-user@incubator.apache.org Subject: Re: Max Number of VMs per Host Hello, ESXI 5 is limit by licenses with the amount of ram you can run on each machine. The 8 GB vRAM limit is for the upcoming 5.0 free Hypervisor, the 4.x version had no such memory limits. VM makes you pay now if you want to use X amount of ram per host with the upcoming version. Making 4.1 I Free Version a much more attractive option to go with We have each of our blades running ESXI 4.1 with 16 Cores and 48 GB of ram and we have 20 VM's per blade but we give 1.5 GB of ram to each VM. More info here http://kb.vmware.com/selfservice/microsites/search.do?language=en_UScmd=displayKCexternalId=1014006 -Alex On Thu, May 24, 2012 at 2:09 PM, Sanders, Arbin D asand...@nccu.edu wrote: I am planning on using a free version of vSphere 5 depending on the how many VMs I can get. I would like to get 50 VMs per host. 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. From: Dmitri Chebotarov [mailto:dcheb...@gmu.edu] Sent: Thursday, May 24, 2012 12:01 PM To: vcl-...@incubator.apache.org Cc: vcl-user@incubator.apache.org Subject: Re: Max Number of VMs per Host 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
Re: Max Number of VMs per Host
How about other hypervisors? KVM limits? Arbin D. Sanders Sent from my Motorola Smartphone on the Now Network from Sprint! -Original message- From: Dmitri Chebotarov dcheb...@gmu.edu To: vcl-user@incubator.apache.org vcl-user@incubator.apache.org Cc: vcl-user@incubator.apache.org vcl-user@incubator.apache.org, vcl-...@incubator.apache.org vcl-...@incubator.apache.org Sent: Thu, May 24, 2012 17:54:59 EDT Subject: Re: Max Number of VMs per Host This link may be helpful http://kb.vmware.com/selfservice/microsites/search.do?language=en_UScmd=displayKCexternalId=2000935 On May 24, 2012, at 5:32 PM, Alexander Patterson alexander.patter...@csueastbay.edu wrote: I'm not sure from what I have been reading, might want to contact your VMware Rep and see what they can do if you plan on upgrading to 5. WIth ESXI 4.1 Infrastructure limitations Some limitations in ESX Server 4 may constrain the design of data centers: Guest system maximum RAM: 255 GB Host system maximum RAM: 1 TB[ Number of hosts in a high availability cluster: 32 Number of Primary Nodes in ESX Cluster high availability: 5 Number of hosts in a Distributed Resource Scheduler cluster: 32 Maximum number of processors per virtual machine: 8 Maximum number of processors per host: 160 Maximum number of cores per processor: 12 Maximum number of virtual machines per host: 320 VMFS-3 limits files to 262,144 (218) blocks, which translates to 256 GB for 1 MB block sizes (the default) or up to 2 TB for 8 MB block sizes.However, on a VMFS Boot drive, it is usually very difficult to use anything other than 1 MB Block size With ESXI 5 there has been some changes to these limits Guest system maximum RAM: 1 TB Host system maximum RAM: 2 TB Number of hosts in a high availability cluster: 32 Maximum number of processors per virtual machine: 32 Maximum number of processors per host: 160 Maximum number of cores per processor: 25 Maximum number of virtual machines per host: 512 VMFS-3 is supported and has the same limits as before VMFS-5 however has a max volume size of 64 TB and a max file size of 2 TB - 512 B How much vRAM does a VMware vSphere Hypervisor license provide? vSphere Hypervisor license provides a vRAM entitlement of 32GB per server, regardless of the number of physical processors. vSphere Hypervisor can be used on servers with maximum physical RAM capacity of 32GB. On Thu, May 24, 2012 at 2:20 PM, Sanders, Arbin D asand...@nccu.edu wrote: Alexander, What if I use the paid version of vSphere5? And I have 96 GB of memory? Could I get more than 20 VMs? 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. -Original Message- From: Alexander Patterson [mailto:alexander.patter...@csueastbay.edu] Sent: Thursday, May 24, 2012 5:17 PM To: vcl-...@incubator.apache.org Cc: vcl-user@incubator.apache.org Subject: Re: Max Number of VMs per Host Hello, ESXI 5 is limit by licenses with the amount of ram you can run on each machine. The 8 GB vRAM limit is for the upcoming 5.0 free Hypervisor, the 4.x version had no such memory limits. VM makes you pay now if you want to use X amount of ram per host with the upcoming version. Making 4.1 I Free Version a much more attractive option to go with We have each of our blades running ESXI 4.1 with 16 Cores and 48 GB of ram and we have 20 VM's per blade but we give 1.5 GB of ram to each VM. More info here http://kb.vmware.com/selfservice/microsites/search.do?language=en_UScmd=displayKCexternalId=1014006 -Alex On Thu, May 24, 2012 at 2:09 PM, Sanders, Arbin D asand...@nccu.edu wrote: I am planning on using a free version of vSphere 5 depending on the how many VMs I can get. I would like to get 50 VMs per host. 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. From: Dmitri Chebotarov [mailto:dcheb...@gmu.edu] Sent: Thursday, May 24, 2012 12:01 PM To: vcl-...@incubator.apache.org Cc: vcl-user@incubator.apache.org Subject: Re: Max Number of VMs per Host Here is some info: http://myvirtualcloud.net/?p
