Backup tools
Matt McLeod
the can't-dump-an-fs-bigger-than-a-tape thing. There seem
to be two obvious options:
* break the fs up into smaller ones, and symlink to hell and back
* dump the fs in parts rather than in one hit
I'm going for the second of the two. Hitch is, the only thing
which seems able to dump an fs without screwing with the [a|m|c]times
is ufsdump, and if you specify a directory rather than a device
you lose the ability to do incrementals.
So -- anyone know of a tool which could be used in place of tar
which doesn't screw with the times and which can be persuaded to
do incrementals?
--
Today is the tomorrow you worried about yesterday
Athanasius
Matt McLeod<use...@wibble.cx> wrote:
>I'm going for the second of the two. Hitch is, the only thing
>which seems able to dump an fs without screwing with the [a|m|c]times
>is ufsdump, and if you specify a directory rather than a device
>you lose the ability to do incrementals.
>
>So -- anyone know of a tool which could be used in place of tar
>which doesn't screw with the times and which can be persuaded to
>do incrementals?
Just a thought, have you tried GNU tar with/without these options:
--atime-preserve
don't change access times on dumped files
-m, --modification-time
don't extract file modified time
? I know it doesn't cover ctime, but it's worth a shot, not to mention
GNU tar should be able to do multi-volume archives.
HTH,
-Ath
--
- Athanasius = Athanasius(at)miggy.org / http://www.miggy.org/
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Matt McLeod
that Athanasius did write:
> Just a thought, have you tried GNU tar with/without these options:
>
> --atime-preserve
> don't change access times on dumped files
>
> -m, --modification-time
> don't extract file modified time
>
>? I know it doesn't cover ctime, but it's worth a shot, not to mention
>GNU tar should be able to do multi-volume archives.
Amanda needs the ctimes, so --atime-preserve would be a Bad Idea.
From stuff I've been reading today, it looks like it isn't
actually possible to do what I want -- either the atime or the
ctime is going to be screwed with unless I use dump.
--
"Me no know chickenatomy. Chick anatomy, yes, but I am
not enthusiastic about fileting any women."
-- m...@steam.stanford.edu (Meg Worley)
Matt McLeod
>On the other hand, ufsdump will dump part of a filesystem (modulo a
>few complaints about not being in the volume), but I don't know enough
>about the guts of amanda to know if this coule be useful.
I use ufsdump for most of the dumps at the moment. The hitch
is that at least on Solaris ufsdump won't do increnentals of
a partial fs.
--
"In those days he was wiser than he is now -- he used to frequently
take my advice." -- Winston Churchill
Russ Allbery
> Russ Allbery <r...@stanford.edu> probably said:
>> uasm seems to do a reasonable job with some of that, although since
>> it's part of Networker you have to use or have used Networker at some
>> point to have it around.
> A foul and minus 2 points for mentioning Nyetworker in a positive sense.
> ;)
Networker is considerably better than butc. And that's all I have to say
on that topic. :) We're now quite happily using neither.
--
Russ Allbery (r...@stanford.edu) <URL:http://www.eyrie.org/~eagle/>
Matt McLeod
>Peter Radcliffe <26$10$f3i...@pir.net> writes:
>
>> Even ignoring ctimes, to my knowledge the only thing that can correctly
>> deal with every nasty file type (device, files with holes, etc, etc,
>> etc) is ufsdump/restore.
>
>uasm seems to do a reasonable job with some of that, although since it's
>part of Networker you have to use or have used Networker at some point to
>have it around.
Don't have a manpage for it, by any chance?
(We've got nyetworker installed, but no docs...)
--
"Now, what was I doing before I so rudely interrupted myself?"
-- Kate "Worse Cop" Morris
Russ Allbery
> Russ Allbery did write:
>> uasm seems to do a reasonable job with some of that, although since
>> it's part of Networker you have to use or have used Networker at some
>> point to have it around.
> Don't have a manpage for it, by any chance?
That we do. I'll mail it to you, as it's fairly long.