Max # of LUNs per host / cluster for FC SAN

[y_wisdom]

I know this question has been asked several times regarding best practice / recommendation on storage for optimum performance. I also know that the max # of LUNs per host is 256, which depends on sereral factors like LUN size, # of VMs per LUN, etc. In real world what is the best way to determine when not to add any more LUNs to the hosts in a HA cluster and create a new a new HA cluster with new set of LUNs.

[azn2kew]

Yes, with vSphere the maximum LUNs is 256 and really it depends on your environment but we've all uses this standard to carve out the LUN to 400-600GB each and allow 10-16VMs per LUN and you can calculate from there. I haven't seen or utilize all 256 LUNs limitation yet but its possible that you may need to use that much. Here is the attached vSphere Maximum configuration guide

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Regards,

Stefan Nguyen

VMware vExpert 2009

iGeek Systems Inc.

VMware, Citrix, Microsoft Consultant