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Old 07-30-2004, 09:33 AM   #1
Registered: May 2004
Posts: 30

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Help with backups

I was put in charge of maintaining a backup process, but sadly I'm just learning linux! Taking a look at this script I see that it splits the compressed file into as many 3072mb segments as required. Right now, it seems like the mkisofs command accounts for two iso images, but I'm fast running out of space. What do I need to do to make sure it creates a third ISO image or is this script already set up for the third file?



# invoke a new script log
/bin/date >$SCRIPTLOG
echo "Creating backup." >>$SCRIPTLOG

# remove old files
cd /u1/dvd.staging.area/ops
rm -rf /u1/dvd.staging.area/ops/*

# tar files and directories.
( cd /u1 ; /bin/tar --atime-preserve -c -v --ignore-failed-read \
-f /u1/dvd.staging.area/ops/$BACKUP \

# generate catalog,
cd /u1/dvd.staging.area/ops
echo "Generating catalog." >>$SCRIPTLOG
/bin/tar -tvf $BACKUP >$CATALOG 2>>$SCRIPTLOG

# compress the backup.
cd /u1/dvd.staging.area/ops
bzip2 -9 $BACKUP

# it's a dirty hack, but it gets the job done. #
# ops doesn't need to be completely backed up #
# therefore this script needs to be rewritten #
# using rdiff. we split into 3GB files, and #
# burn two CD's - aglenn 04/29/2004 #

# split the file into 3GB pieces.
cd /u1/dvd.staging.area/ops
/usr/bin/split -b 3072m $BACKUP.bz2 $BACKUP.bz2.
#rm -f $BACKUP.bz2

# create ISO image.
echo "Creating ISO image file(s) ." >>$SCRIPTLOG
/usr/bin/mkisofs -r -J -V "OPERATIONS $DATE CD1" -o /u1/bertha/backup/DAILY-ISO-IMAGES/ops1.iso \
Old 07-30-2004, 09:56 AM   #2
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Registered: Jan 2004
Location: Roughly 29.467N / 81.206W
Distribution: OpenBSD, Debian, FreeBSD
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The program split will break the file into as many parts as it needs. Does this script leave one or two iso images? It looks like it puts all the chunks into one big iso image. Do you actually burn the images after this?

Hmm, I think I need to spend some more time reviewing this script. Not sure I am not missing something.
Old 07-30-2004, 10:29 AM   #3
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Registered: Jan 2004
Location: Roughly 29.467N / 81.206W
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Okay, I am having some trouble with this script. Everything appears okay till the last line (which is incomplete).

It would help if I had the rest of the script to review -- I am running it on a test system with fake directories and files to see just how it performs. Note: If /u1/ops is a seperately mounted partition you might want to look at replacing tar with dump -- as dump will let you do incremental backups (like you said you only want to backup what has changed).

In the meantime... what is the rest of the script... starting with the rest of the last line.


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