Date: Wed, 22 Oct 2003 13:00:54 -0700 (PDT) From: Dave McCammon <davemac11@yahoo.com> To: freebsd@ryansandridge.com Cc: freebsd-questions@freebsd.org Subject: Re: strange dump (dark matter?) Message-ID: <20031022200054.30862.qmail@web41412.mail.yahoo.com> In-Reply-To: <B97C161A-04B5-11D8-AAFC-003065BBC750@sandridge.org>
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--- Ryan Sandridge <ryan@sandridge.org> wrote: > Hello all. I decided it was time to start doing > backups. On Oct 7th, > I did a full dump of /usr filesystem (among others), > as such: > # dump -0uan -f - /usr | gzip -7 > > /tmp/20031007-usr-lvl0.dump.gz > > This seemed to work as expected, here is some info > about the gz file: > % gzip -l 20031007-usr-lvl0.dump.gz > compressed uncompr. ratio uncompressed_name > 507027476 1590855680 68.1% 20031007-usr-lvl0.dump > > Everything so far so good. Today (Oct 22) I tried > an incremental dump, > as such: > # dump -5uan -f - /usr | gzip -7 > > /tmp/20031022-usr-lvl5.dump.gz > > Here is where I start getting confused. While my > other incremental > backups today (/ and /var), seemed to be fine, the > /usr dump was huge. > Here is info about the gz file: > % gzip -l 20031022-usr-lvl5.dump.gz > compressed uncompr. ratio uncompressed_name > 527112624 543600640 3.0% 20031022-usr-lvl5.dump > > This incremental backup is larger than the original > full dump. Also > notice that the compression ratio was 3.0%. When > examining the list of > files dumped, I don't see anything that could lead > to a file size like > this. A rough count shows that the backup should > have been roughly > 11MB uncompressed, compared to the 518MB > uncompressed. I've tried > reading up on both dump and gzip, but haven't found > a clue. Perhaps > I've discovered dark matter. > > Thanks, > Ryan Where is the file of your first backup stored? Did it get backed up as part of the incremental backup? __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com
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