Re: [PLUG] Upcoming PLUG North Virtualization Roundtable - KVM and Virtualbox experts wanted!

[Lee Marzke <lee@marzke.net>]

Lee Marzke wrote:
> Michael Leone wrote:
>   
>> On Wed, Jul 29, 2009 at 7:02 PM, Lee Marzke<lee@marzke.net> wrote:
>>
>>   
>>     
>>> We went with NFS to a NetAPP FAS instead of  ISCSI or FC.    Since the
>>> NetAPP FAS supports  Single Instance
>>> Storage (De-duplication )  I found  the storage used for many similar
>>> VM's was only 1/5 the space of a non SIS array.
>>>     
>>>       
>> So wait ... the ESX hosts mount their datastores using NFS, across you
>> LAN? Am I missing something here? How is that faster than a direct
>> connect using FC?
>>   
>>     
>
>
>   

I had heard that NFS was better than iSCSI / VMFS but never got a chance
to benchmark it.

Here are some links that quantify it,  claiming 1GB link to NFS storage
is actually faster than
Fibre Channel /  LUN / VMFS .

http://storagefoo.blogspot.com/2007/09/vmware-over-nfs.html
http://blogs.netapp.com/dave/2007/09/why-run-vmware-.html

You should, however,  manually adjust the partition offset  (with fdisk)
when creating
disks in the guest according to VMware/SAN best practices.

Lee

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