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ESXi 5/6 and Maz Number of RDM's and Path's

Posted on 2016-09-12
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Last Modified: 2016-09-16
We have a number of WIndows 2008/2012 Failover Cluster running in VMware but I need to build a two node Widows Cluster that will a have 50 RDM's present to it. It is for a special archive application which uses mount point in the OS. I have never presented this many RDM's to a VM be for. Also each LUN has 8 paths which means there will be 480 paths just for this VM not including the 4 attached datastore bring the number of paths up to 512. I know the max number of path per host is 1024 for FC/ Fcoe

Are there any performace problems I should be aware of. Also I hate to say it and one host is running ESXi  6 and the other host are running 5.1 which I know is not supported any more.
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Question by:compdigit44
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LVL 123
ID: 41795170
Should not be any issues, all within maximums for ESXi 6.0 and ESXi 5.1 (retired, no longer on support!)

1024 max paths per ESXi host, 60 targets per virtual machine, 32 paths per LUN

so all looks good there for 6.0 and 5.1.
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by:compdigit44
ID: 41795180
Thanks I figure but just wanted to confirm..

Do you know of a existing powercli script to list all RDM eui id's the mark them as perennially reserved?
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LVL 123
ID: 41795188
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by:compdigit44
ID: 41796716
Thanks for the script very stupid question in steps 1 & 2 where you build the script I see the variable for $targetcluster but where do I type in the target cluster name
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LVL 123
ID: 41796755
not even looked at the script or ran it.

I'll have a look later.
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by:compdigit44
ID: 41797075
Thank you as always for your help
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by:compdigit44
ID: 41797793
I was able to figure out the $targetcluster problem but the script keep erroring out on Get-ESXcli .. I found another scirpt very similar online that seemed to work
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by:compdigit44
ID: 41797799
IS there any easy way to list all RDM in at the cluster level and confirm the reservation setting was updated correctly
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Accepted Solution

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Andrew Hancock (VMware vExpert / EE MVE^2) earned 2000 total points
ID: 41797841
Problem with scripts, is they need to be continuously updated, as functions in PowerCLI are deprecated!

well a script is the answer.

if you don't have a script, you could always check a random sample of the 50.

Although we always like belt and braces approach, and take time to check manually.
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by:compdigit44
ID: 41797925
I agree but I have 15 host to check with access to 12 RDM's each... :-(
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