Hi,
Hi,
The only thing I can think off (maybe not the only one out there...) is queue depths. This article gives a good glimpse at that.
It talks about vsphere queues, if possible, look at your storage depth queues to try to figure out if they are enough and do some monitoring afterwards to see if they need any change.
I'm not very familiar with the procedure, but hopefully this points you to the right place.
Best regards and best of lucks with those changes!!!
elgreco81
Hi Henrik,
I don't see why that could be a bad idea, except for having 60 LUNS in each server which I think it could be difficult to manage. I would try to have some kind of control in order to not overuse any LUN and have some kind of control (maybe using profile driven storage or storage DRS).
If the only reason for doing this is move the VMs between clusters, woudn't be a good idea to have an NFS Datastore common to all hosts and clusters and use it as an intermediate step? Maybe this is good enough and it wouldn't have such a big impact in your enviroment.
What do you think?
Regards,
elgreco81
You might find this link informative.
http://vmsarefreeright.wordpress.com/2011/04/22/shared-vmfs-volumes-on-non-clustered-hosts/
Hi elgreco81,
Thanks for your response.
I agree that managing 60 LUNs on each host is not very appealing.
Currently the size of our LUNs is 1 TBytes (goes all the way back to vSphere 3) and we are considering consolidating the LUNs to fewer LUNs of a size of 4 TBytes and use datastore cluster to group the datastores together, based on the NetApp backup policy for each datastore.
However my main concern is that connecting 36 hosts (instead of 12 hosts) to each LUN will cause some kind of problem, similar to the SCSI-reservation problems for pre-VMFS 5 datastores?
/Henrik
Hi,
The only thing I can think off (maybe not the only one out there...) is queue depths. This article gives a good glimpse at that.
It talks about vsphere queues, if possible, look at your storage depth queues to try to figure out if they are enough and do some monitoring afterwards to see if they need any change.
I'm not very familiar with the procedure, but hopefully this points you to the right place.
Best regards and best of lucks with those changes!!!
elgreco81