On 1/10/2015 5:13 AM, Daniel Hoffman wrote: > Looking for some guidance/experience with LVM and pvmove. > > I have a LUN/PV being presented from a iscsi SAN. The LUN/PV is presented > to 5 servers as a shared VG they all have LV's they use for data, they are > all connected via iSCSI. > > As the SAN I am using is being replaced I need to move onto a new unit. > > My migration strategy at this time is to > > 1. Present a new LUN from the new SAN to all machines. > 2. Make a PV with the new LUN. > 3. Add it to the existing VG. > 4. Use pvmove to move all the data from one PV to another. > 5. Once the old LUN is empty, complete a pvresize to remove the old LUN. > > This all seems sound but looking for advice, specifically around the fact > that the VG/PV data is being used by a number of machines/servers and the > LV's are active on a number of different nodes. > > All the documentation/examples I can find assume a disk in a server, not a > LUN on a SAN being shared by a number of servers. only way I'd do that would be to shutdown the other 4 servers, redo the LVM, then bring the other 4 servers back up so they can discover the new LV/PV structures. -- john r pierce 37N 122W somewhere on the middle of the left coast