Evan> We're experiencing an issue with a NetApp SAN that I've recently Evan> inherited (on Monday) as a responsibility and which I'm lacking Evan> a depth of knowledge with.
Ouch! Netapps can work with SAN LUNs, but it can be tricky and they are NOT space efficient, esp if you do snapshots. Evan> The previous sys admin thin provisioned everything and now Evan> everything has overgrown and VMs running on certain LUNs are Evan> fully down due to there not being enough storage available. Care to share some data on your system? You can use my attached perl script to get a nicely formatted overview of your aggregates and volumes. Doesn't know about LUNs or snapshots, but if people ask nicely... I could add that info. Evan> Can anybody recommend an expert to help with this as we do not Evan> have a support contract in place? Obviously this will be at a Evan> cost - that is acceptable. First off, get an overview of where your problem is. If you do a 'lun show -v' on the filer, does it show that some or all of the luns are offline? Next, look at the volumes. I life 'df -h' (again, directly on the filer) since it shows both volume and snapshot space. With LUNs, you generally need to reserve 120% of the disk space of the lun for snapshots. This is where Netapp falls down IMO, since luns are just a large single file to the Netapp. If a block changes, the entire file/lun needs to be copied to the snapshot area. Further changes are on a per-block level though, which helps.
dfnva
Description: Pretty print Netapp df info.
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