Subject: Re: file system info tool?
To: Malcolm Herbert <email@example.com>
From: Luke Mewburn <lukem@NetBSD.org>
Date: 11/08/2004 18:48:51
Content-Type: text/plain; charset=us-ascii
On Sat, Nov 06, 2004 at 01:27:40PM +1100, Malcolm Herbert wrote:
| | Are there any benefits which outweigh this problem?
| |The biggest benefit for me is that dump doesn't update atimes.
| hmmm ... the manual for tar lists and option for it as well, so the
| NetBSD version of tar looks to support that now as well ...
pax -t does this as well.
Too bad rsync and rdiff-backup don't support this functionality;
atime preservation is important for new mail detection on mbox-style
mailboxes (and even though I cope with it, I don't like Maildirs
with 10000 mail messages in them; they ARE slower than mboxes)
| |I also really like the 'nodump' flag (see cflags(1)), and use -h 0 to
| |have this respected even on full dumps. My disks are bigger than my
| |tape drives, and this lets me avoid dumping e.g. gnome/TeX goop in
| |/usr/pkg, which I'm going to rebuild rather than restore if my disk
| |dies anyway.
| pretty cool, but same can be done with include/exclude lists as under
| tar. In some respects I would rate that a better solution, since it's
| more obvious and explicit - if filesystem Badness happens, you may lose
| that flag ... but then by the same token you could lose the list file
| as well, so I guess we're even.
| I can't seen a manual entry for cflags(1) on my system, nor on the
| NetBSD website ...
I think Greg meant chflags(1).
chflags nodump is really handy; you don't need to maintain external
exclude lists, although you could derive the latter from a find(1)
of the former; I've considered this for my rdiff-backup backups.
| memory is a vague thing - I seem to recall that dump uses the cpio
| format on tape, or is that a completely different thing? You can't tell
| I've used just tar all my profesional life since the incident mentioned
| above ... :)
dump(8)'s file format is similar to the on-disk file system (ffs) format,
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.6 (NetBSD)
-----END PGP SIGNATURE-----