On 10 Feb 2005, at 19:26, Arthur Pemberton wrote:
I've done some reading, but I honestly can't see what makes it such a better idea. I'm guessing I just haven't happened upon a situation where I wished i had it.LVM is setup by default on fc3 and RHEL4 when it is released. its a better idea in the long term
Got any practical scenarios, just out of curiousity.
LVM2 snapshots allow you to backup live filesystems. Usually, you shouldn't backup a live (i.e. mounted and being used) filesystem with utilities like "tar" and company, since they can't lock files being backed up to avoid changes made by running processes.
A LVM2 snapshot, however, guarantees consistency as it "takes an image" of the filesystem and freezes it which can be backed up to tape, or to remote storage without worrying about possible inconsistencies caused by running processed modifying data.
