Im just reconfiguring our SAN, and have setup one large array as a single LUN to ESXi 4.1.
I was under the impression that i could have multiple datastores on one LUN, with each host accessing a different datastore on that LUN?
Can somoene confirm?
Or will i have to carve the array up SAN side, and assign a chunk for each datastore i want, on a different LUN?
Thanks in advance all.
You need to do a 1:1 mapping with Datastores to LUNs
Never create multiple datastores on a single LUN
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You may create multiple datastore in a single lun using command line but this option is NOT recommended, this will lead to more SCSI reservation conflicts because for every option on those datastores the ESX hosts would have to place a lock on the metadata region of the LUN. This configuration will work but not recommended for production use case.
VCP3/4, HPCP, HP UX CSA http://kb.vmware.com/
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That is the most effortless way to do it and 500GB is conservative enough.
There are some considerations around Datastores but the main one is
- Number of VMs/vmdk's per datastore depending on workload
So creating a few 500GB Datastores will be fine, but try to spread the workload across them all.
In other words do not fill up the 1st datastore and then move to the next.
Also try to keep your high I/O VMs on separate datastores
I have attached a LUN size calculator just in case
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