Metalun vs. larger raid group
Posted on 2010-09-01
I was recently asked a question I cannot answer and I'd like to get some outside input on this.
We have an EMC Clariion environment.
We have a server that requires a single 2tb lun and pretty high IOPS, more than a single 5disk raid5 raidgroup can provide.
I have two choices, either go with a 10disk raid5 raidgroup with a single 2tb lun or go with 2x 5disk raid5 raidgroups and create a 2tb metalun across them.
Both would be utilizing all spindles. Every other raidgroup we have is a 5disk raid5 group. Other than "trying to keep all the raidgroups the same" what other reason do I have to go with one over the other?