[nzlug] review: ext3cow fs (ext3 versioning variant)

[Craig Box]

> how is that different from lvm snapshots?
> lvm snapshots work with any filesystem. accessing older snapshots
> requires mounting them i think, but that's just the interface. i wonder
> whether the snapshoting itself is more or less efficient.

The biggest problem I have is that you can't tell an LVM snapshot to grow
dynamically.  I use LVM snapshots with Samba (see
http://www.wlug.org.nz/SambaShadowCopyHowto) and have to have a convoluted
system to grow each snapshot daily, because I can't just have it say "resize
as required to store the changes" - if it runs out of space, it will just
not keep changes.

Craig