Matthijs Kooijman wrote: > Hi Scott, > >> One could always run the mailstore on LVM and then you could snapshot the >> mount and then fsck it while still technically in use. It would probably slow >> down the filesystem, but it is still live. > Uhm, and then you have a nice and fsck'd snapshot, but your live filesystem > will still be untouched? Or do you propose replacing the mailstore with a > (readonly?) versioned mounted from the lvm snapshot? I'm not aware of anything > that can swap filesystems like this online (ie, with files open) and that > would also mean that while fsck'ing, you can only read mail, not receive, move > or delete mail? >
Changes made to a snapshot will never been seen by the fs it was snapshotted from and vice-versa. It uses copy on write which will get progressively slower as the snapshot and the origional diverge until you end up with a performance disaster. http://www.nikhef.nl/~dennisvd/lvmcrap.html ~Seth