On Wed, Oct 14, 2009 at 11:22:36AM -0700, nate wrote: > John R Pierce wrote: > > > if you have a SAN that supports logical volumes that have snapshot and > > grow and such, I'm not sure why you'd bother with LVM on top of that, it > > would just further obfuscate things. > > Makes life easier for me when using MPIO, auto detection of the > volume no matter what path it shows up with. And I can slap an > easily readable "label" on the volume so I know what it is. Couldn't you accomplish this with the "alias" parameter in your multipath.conf file per LUN? We have this set up here so there's a /dev/mpath/<friendly_name> based on the WWID. (Not that I have any problem with using LVM as you are...) > > Sample log from one of my oracle snapshot procedures: > http://portal.aphroland.org/~aphro/san/oracle-restore-prod-oracle-1a_20080319_230901.log > > And it allows me to better control growth with thin provisioning, > some apps are not thin provisioning friendly so I restrict them > with LVM, knowing that I can easily do an online resize at any > time without touching the array. Definitely. Ray