On 22/05/12 14:41, James Harper wrote:
I have a windows VM running under Xen, and want to take snapshots of all the LV's it is using as it's physical disks, eg:
vg0/lv0 - OS vg0/lv1 - FILESTREAM data vg1/lv2 - Databases vg2/lv3 - Database Logs
vg's 0, 1, and 2 are on different sets of spindles to give higher IOPS. The problem is that the 4 snapshots need to be created atomically or else I'm going to get my database and transaction logs out of sync as there could be a few ms between the snapshot of lv2 and lv3.
I think this isn't possible based on the documentation I've read, but maybe someone here knows different?
I'm not sure which database you're using.. but if it's PostgreSQL, then there are some specific functions you can use to help in these situations. Toby