Re: NFS problem with NetworkAppliance .snapshot

H. Peter Anvin (hpa@transmeta.com)
30 Oct 1998 01:26:36 GMT

Followup to: <36390EF0.7FFE369F@sls.lcs.mit.edu>
By author: Lee Hetherington <ilh@sls.lcs.mit.edu>
In newsgroup: linux.dev.kernel
>
> Background:
>
> NetworkAppliance dedicated NFS servers have a snapshot capability that
> allows for quick read-only access to past versions of files and
> directories. They make this available via a hidden .snapshot directory
> in every NFS directory. I say hidden because it does not show up via ls
> (and readdir). So, "ls -a" does not show it, but "ls .snapshot" does
> list its contents, which are things like hourly.0, nightly.2, weekly.1,
> monthly.1, etc. The reason the directory is normally hidden is so that
> recursive tar's and cp's do not descend into it.
>

This is a known problem, and is due to the way NetApp gives out
descriptors to the files in these directories. The recommended way to
use these directories under Linux is to mount them explicitly under a
different mount point (which resolves the problems)

uranium:/.snapshot 28464720 10189612 18275108 36% /snapshot/uranium

until this issue has been resolved.

-hpa

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