Date: Mon, 10 Oct 2005 17:38:38 -0700 From: Tim Kientzle <kientzle@freebsd.org> To: Ed Maste <emaste@phaedrus.sandvine.ca> Cc: Garrett Wollman <wollman@csail.mit.edu>, freebsd-current@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: Bsdtar and archive torture tests Message-ID: <434B098E.7070506@freebsd.org> In-Reply-To: <20050928223927.GA11161@sandvine.com> References: <20050926195807.GD95971@sandvine.com> <17208.30606.117170.36398@khavrinen.csail.mit.edu> <20050927001650.GA9994@sandvine.com> <20050927180021.GB9994@sandvine.com> <433A2882.4030003@freebsd.org> <433A2D6E.7020205@freebsd.org> <20050928152112.GC9994@sandvine.com> <20050928214309.GA31848@xor.obsecurity.org> <20050928223927.GA11161@sandvine.com>
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Ed,
Have you done anything with this? I'm very interested in
getting some real regression tests imported and this seems
like a great place to start.
Ideally, the test would be run several times:
* archive with gnutar/extract with bsdtar
* archive with cpio/extract with bsdtar
* archive with bsdtar/extract with cpio
* archive with bsdtar/extract with gnutar
* etc...
Unfortunately, the exact tests here will vary slightly:
* gnutar can archive sparse files that bsdtar should
correctly extract, but neither bsdtar nor cpio can
archive sparse files
* bsdtar can archive (and restore) very large directories
and very deep directory trees. My testing of this has
been somewhat hampered by limits in the rest of the
system: /bin/sh won't cd to a dir whose path is longer
than about 8k, rm/find/ls/du are all limited to 32k
path lengths, etc.
I suspect the ideal test arrangement would provide switches
to the comparison routine to omit/ignore certain files.
Then you could build a single "original", make several copies
using the above combinations, then compare while overlooking
any unsupported attributes.
Thoughts?
Tim
Ed Maste wrote:
> On Wed, Sep 28, 2005 at 05:43:09PM -0400, Kris Kennaway wrote:
>
>
>>Can we import the tar stress tests as a regression test? i.e. what is
>>the license on them?
>
>
> Right now the only mention of any copyright info is
> # Copyright 2003, Elizabeth D. Zwicky
> in one of the files.
>
> The author states
> The test programs were written in a spirit of experimentation,
> rather than with the intention of producing software for other
> people to use. I strongly encourage people who are interested
> in testing backup and archive programs to produce their own
> tests that cover the cases they are most interested in. However,
> if you insist on using my programs, or just want to snicker at
> my programming, they are available from
> http://www.greatcircle.com/~zwicky
>
> Despite that, I think they've already demonstrated their value.
>
> The stress test consists of two perl programs. One creates a test tree,
> and the other compares file metadata between the original tree and a
> restored tree. An automated method for running the test and comparing
> the results is not included (but would be easy to write, of course).
>
> I'll contact the author to ask about the license.
>
> --
> Ed Maste, Sandvine Incorporated
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