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1 2 Previous Next 17 Replies Last post: May 29, 2008 7:55 AM by williambishop   Go to original post

Re: Max no of vm per lun

15. May 27, 2008 8:11 AM in response to: tom_brechet
Click to view Texiwill's profile Guru 10,236 posts since
Jan 13, 2004
Hello,

Unforunately there is no exact number. It is a combination of the maximum vCPUs per host, and the size of the VMDKs in use, plus the limit of 2TB VMFS-3.


Best regards,
Edward L. Haletky
VMware Communities User Moderator
====
Author of the book 'VMWare ESX Server in the Enterprise: Planning and Securing Virtualization Servers', Copyright 2008 Pearson Education. CIO Virtualization Blog: http://www.cio.com/blog/index/topic/168354, As well as the Virtualization Wiki at http://www.astroarch.com/wiki/index.php/Virtualization

Re: Max no of vm per lun

16. May 29, 2008 7:29 AM in response to: tom_brechet
Click to view eagleh's profile Hot Shot 166 posts since
May 14, 2008
"Carefully determine the number of VMs you can place on a single LUN in your particular environment. Note that, with new VMware Infrastructure 3 capabilities such as iSCSI and NAS, this determination has become even more complex. While VMware Infrastructure 3 supports up to 100 VMs per LUN, 32 VMs per LUN may often be acceptable. However, HP recommends being more conservative and using 8 - 10 VMs per LUN. In a NAS or iSCSI environment, HP recommends using 8 - 16 VMs per LUN. If your VMs are not heavily impacting I/O, you may be able to exceed the conservative recommendations above." ---- <VMWare3_StorageWorks_BestPractice.pdf>
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Re: Max no of vm per lun

17. May 29, 2008 7:55 AM in response to: eagleh
Click to view williambishop's profile Master 1,159 posts since
Mar 9, 2006
Again, those numbers are not fixed by vmware itself. You'll note that most of the limit numbers were from the storageworks best practice guide....Which is only one array of many. Vmware prefers you not to overload the luns....but it varies according to how strong the array you are using. A symmetrix is easily capable of 150+ vm's per lun.

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