Scripts for Backup with Data Compression
2007-12-25 11:54:00
QUESTION:
I submitted the following message:
I have a network which is growing much faster than my mass
storage peripherals acquisition. The obvious consequence,
is the need of backups with compression procedures.
I have a mixed network with solaris 2.4, solaris 2.5 and,
(it couldn't be different) all flavors of SunOS 4.1.x.
I would like to have some suggestions of scripts to perform
backups with data compression. Would you help me?
REMARKS:
It seems to be a very interesting and still challanging discussion,
where one have to decide among comercial dedicated software, Public
Domain Software or home made scripts. I still don't have my position,
but I think it shall be contributive to post the answers I got. Any
contributional infortion is, more than ever, still welcome.
THANKS:
rsm@idc.tandem.com (R.SrinivasaMoorthy)
gibian@stars1.hanscom.af.mil (Marc S. Gibian)
Thank you all.
SOLUTION:
1. Using Public Domain software, the best solutions is to try
AMANDA software. It can be found in:
( http://www.cs.umd.edu/projects/amanda/index.html )
2. Using comercial software, there are lots of options, among then
Solstice Backup, which is a Sun Software product for Solaris.
3. Some personal scripts I got:
3.1 Dave Foster, foster@bial1.ucsd.edu, suggested:
I've attached a script that I wrote and use to back up our systems.
If you download GNU's tar, you can use the -z option to use gzip
to compress the backup.
Dave Foster
#! /bin/csh
#
# SYSTEM_BACKUP_2GB
#
# Script to backup system directories using tar. Use GNU tar.
# Backup device is expected to be 2GB 4mm tape drive.
# When run on empty tapes for the first time, you must
# backup all partitions prompted!
#
# Backups are performed in the following order:
#
# /, /usr, /var, /usr/openwin, /opt, /export/home
# Remote host where 4mm tape drive lives
set RHOST = bial5
set DEVICE = /dev/rmt/0n
set GET_HOSTNAME = /usr/ucb/hostname
set quiet = 0
if ( $#argv > 0 ) then
if ( $argv[1] == "quiet" ) then
set quiet = 1
else if ( $argv[1] == "-h" ) then
echo " "
echo " Usage: system_backup_2GB [quiet]"
echo " "
exit 1
endif
endif
if ( $quiet == 0 ) then
set LOCAL_OPTIONS = cvlf
set REMOTE_OPTIONS = cvlfb
else
set LOCAL_OPTIONS = clf
set REMOTE_OPTIONS = clfb
endif
if ( `/usr/ucb/whoami` != "root" ) then
echo " Must be super-user to run this script"
exit 1
else
set OPTION = Junk
while ( $OPTION == "Junk" )
echo " "
echo " You can backup [All] or [Individual] partitions..."
echo " "
echo -n " Choose backup option [A/I]: "
set line = $<
switch( $line )
case [aA]:
set OPTION = All
breaksw
case [iI]:
set OPTION = Individual
breaksw
case default:
set OPTION = Junk
breaksw
endsw
end
# If local host and RHOST are equivalent then local backup
if ( `${GET_HOSTNAME}` == $RHOST ) then
set LOCATION = Local
else
set LOCATION = Remote
endif
pushd / > /dev/null
if ( $LOCATION == "Local" ) then
mt -f $DEVICE rewind
else
rsh $RHOST mt -f $DEVICE rewind
endif
if ( $OPTION == "Individual" ) then
echo -n " Backup these partitions {/,/usr,/var} [y/n]: "
set line = $<
else
echo " "
echo " Backing up {/,/usr,/var}..."
set line = Y
endif
switch ( $line )
case [yY]:
if ( $LOCATION == "Remote" ) then
tar $REMOTE_OPTIONS - 20 . | rsh $RHOST dd
of=$DEVICE obs=20b
cd /usr
tar $REMOTE_OPTIONS - 20 . | rsh $RHOST dd
of=$DEVICE obs=20b
cd /var
tar $REMOTE_OPTIONS - 20 . | rsh $RHOST dd
of=$DEVICE obs=20b
else
tar $LOCAL_OPTIONS $DEVICE
--ignore-failed-read .
cd /usr
tar $LOCAL_OPTIONS $DEVICE
--ignore-failed-read .
cd /var
tar $LOCAL_OPTIONS $DEVICE
--ignore-failed-read .
endif
breaksw
case default:
echo " "
mt fsf 3
breaksw
endsw
echo " "
if ( $OPTION == "Individual" ) then
echo -n " Backup these partitions {/usr/openwin} [y/n]: "
set line = $<
else
echo " "
echo " Backing up {/usr/openwin}..."
set line = Y
endif
switch ( $line )
case [yY]:
cd /usr/openwin
if ( $LOCATION == "Remote" ) then
tar $REMOTE_OPTIONS - 20 . | rsh $RHOST dd
of=$DEVICE obs=20b
else
tar $LOCAL_OPTIONS $DEVICE
--ignore-failed-read .
endif
breaksw
case default:
echo " "
mt fsf 1
breaksw
endsw
echo " "
if ( $OPTION == "Individual" ) then
echo -n " Backup these partitions {/opt} [y/n]: "
set line = $<
else
echo " "
echo " Backing up {/opt}..."
set line = Y
endif
switch ( $line )
case [yY]:
cd /opt
if ( $LOCATION == "Remote" ) then
tar $REMOTE_OPTIONS - 20 . | rsh $RHOST dd
of=$DEVICE obs=20b
else
tar $LOCAL_OPTIONS $DEVICE
--ignore-failed-read .
endif
breaksw
case default:
echo " "
mt fsf 1
breaksw
endsw
echo " "
if ( $OPTION == "Individual" ) then
echo -n " Backup these partitions {/export/home} [y/n]: "
set line = $<
else
echo " "
echo " Backing up {/export/home}..."
set line = Y
endif
switch ( $line )
case [yY]:
cd /export/home
if ( $LOCATION == "Remote" ) then
tar $REMOTE_OPTIONS - 20 . | rsh $RHOST dd
of=$DEVICE obs=20b
else
tar $LOCAL_OPTIONS $DEVICE
--ignore-failed-read .
endif
breaksw
case default:
echo " "
mt fsf 1
breaksw
endsw
if ( $LOCATION == "Local" ) then
mt -f $DEVICE rewind
else
rsh $RHOST mt -f $DEVICE rewind
endif
echo " "
echo " System backup complete"
echo " "
popd > /dev/null
endif
3.2 Srinivasa Moorthy, rsm@idc.tandem.com, suggested:
Hi,
You could do something like this.
From the system you can issue commands(in a script!!) to the target
system as
rsh <target system> /usr/etc/dump 0udsbf 216000 8000 126 - <filesystem> 2>>
$LOGFILE | /usr/local/bin/gzip | dd of=/dev/nrst8 bs=1024
I found the above very usefull. The only problem is that it takes
longer time to backup, because it has to compress!!.
Try this out..
Thanks
Srinivasa Moorthy
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