On Oct 22, 2003, at 4:00 PM, Dave McCammon wrote:
--- Ryan Sandridge <[EMAIL PROTECTED]> 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.
Where is the file of your first backup stored? Did it get backed up as part of the incremental backup?
I should have mentioned that I had checked that already, because that would almost explain the unaccounted for 507 MB... but unless I'm missing something, that is not the problem. The backups were made onto /tmp filesystem, which were then archived to cd-rom, and deleted from /tmp. Ah, might be onto something though... I made an .iso file containing the dumps, which was copied to my home directory before burning to cd. That .iso file sat there until today, but was deleted before I did today's dump. So, I suppose it is possible that the filesystem wasn't flushed (is that what its called?), so the file was still there. I presume, however, this would be a bug with dump, as that .iso file is NOT in the archive.
Do you think this is what happened?
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