On Apr 21, 2010, at 8:35 AM, Edward Ned Harvey wrote: >> From: Richard Elling [mailto:richard.ell...@gmail.com] >> >> On Apr 20, 2010, at 10:21 PM, Brandon High wrote: >> >>> On Fri, Apr 16, 2010 at 10:54 AM, Edward Ned Harvey >>> <solar...@nedharvey.com> wrote: >>>> there's a file or something you want to rollback, it's presently >> difficult >>>> to know how far back up the tree you need to go, to find the correct >> ".zfs" >>>> subdirectory, and then you need to figure out the name of the >> snapshots >>> >>> There is one feature that OnTap has which I miss in zfs. Every >>> directory has a hidden .snapshot directory, so you never need to look >>> in the parents. >> >> What happens when you remove the directory? > > Same thing that happens when you remove the .zfs directory. You can't.
Are you sure I cannot rmdir on a NetApp? That seems like basic functionality to me. Or are you thinking "rmdir dirname/.snapshot" when I'm thinking "rmdir dirname; mkdir dirname" which is a common operation in a developer environment. Or "mv dirname dirname-old; mv dirname-new dirname" which is common when managing software upgrades that are not clone-aware. > Also, the .snapshot directory isn't visible via regular ls or whatever, > unless you explicitly name it, just like .zfs directory. > > Long story short, the .snapshot directory, and the .zfs directory are pretty > much identical concepts, except that the .snapshot directory is accessible > in every subdirectory, and it has a list of the snapshots inside it, already > down at that directory level. Whereas the .zfs directory you can only find > if you go back up to the head of the filesystem, and then you have to select > a snapshot and tunnel down again to the level you're at. > > Make sense? The .snapshot idea is better. But presumably not allowable in > ZFS for either technical or legal reasons. This works only if you do not change the directory structure (DOS 1.0? :-) -- richard ZFS storage and performance consulting at http://www.RichardElling.com ZFS training on deduplication, NexentaStor, and NAS performance Las Vegas, April 29-30, 2010 http://nexenta-vegas.eventbrite.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
