Somewhat new to setting up virtualization. I'm using CentOS 6.5 for KVM and have Fibre Channel SAN storage, which is NPIV capable.

I'm wondering what is best practice in terms of which pool type (eg. dir, fs, netfs, disk, iscsi, logical, scsi) to house a bunch of VM Guest OS images. Say about 15 guests with an OS boot drive of 40GB. Guests could later have their own data or DB luns, but I'm talking about the OS boot drive for the guest.

I'm not looking for super high performance. This is a dev environment and I have only one SAN fabric switch so can't do multipath. (well I guess I could still use multipath with different ports)

Creating 15 40GB LUNS, one per VM guest seems too much to manage.

From manageability perspective, one storage pool from a 1TB LUN on the SAN sounds good, but what is the best practice way to make use of that 1TB for guest images? How do most people set it up when using a fibre channel SAN?

I'd set up an LVM based pool on the SAN, using /dev/mapper/... I would also push for additional fabric paths, a single path will be your bottleneck and SPOF