[ovirt-users] iSCSI - recommended LUN size?

Some noob questions on iSCSI as I am doing an evaluation on NFS vs iSCSI. 1. Is there a best practices guide to LUN sizing for oVirt? E.g. N x 200G, N x 500G, N x 1 TB. http://www.ovirt.org/Quick_Start_Guide#Create_an_iSCSI_Data_Domain "oVirt platform supports iSCSI storage domains spanning multiple pre-defined Logical Unit Numbers (LUNs)." 2. Since we can extend the storage domain, I was thinking of multiples of 200G. Any reason not to do it this way? https://www.mail-archive.com/users@ovirt.org/msg13638.html "please note: - you can extend a *storage domain* by adding an extra LUN to it from ovirt-engine." 3. Any production experience with LIO target/targetcli as backend? Thanks! - Anthony