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RMAN commands inside crontab shell script

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# 1  
Old 03-04-2013
RMAN commands inside crontab shell script


I'm trying to write simple script to delete archive logs for RMAN, unfortunately it's not working, I tried two way to do that:

echo "Start ....."
rman target=/ << EOF
  delete force noprompt archivelog until time 'sysdate-10';
echo "END ..."
echo `date`

the other way was

I wrote RMAN commands in separate file:

vi /scriprts/rman_c.txt
  delete force noprompt archivelog until time 'sysdate-10';

Then I called those commands from shell script

echo "Start ....."
rman target=/ @rman_c.txt
echo "END ..."
echo `date`

When I run the script it will work in command line, but when I use it as crontab job it will never connect to RMAN

the output log for crontab job script will be:

cat /tmp/log.txt
 Start .....
END ...
Mon Mar 4 12:09:01 AST 2013

# 2  
Old 03-06-2013
Do you get any errors? Running in 'cron' is not like logging in, more like running "ssh user@ost ksh". Your environment is not set up, so commands that work interactively or with a controlling terminal may not run. Usually, the script starts with something like ". ./.profile </dev/null >/dev/null 2>&1" to get environment, but if you need a tty, tougher, maybe "ssh -tt localhost ' ./.profile </dev/null >/dev/null 2>&1;cmd args ....".

Also, 'cron' can discard or email stdout and stderr, so redirect them right off in the crontab line, and maybe everything inside the script as well:
(...) >>cron_xxx_log.$( date '+%Y-%m-%d' ) 2>&1

Be careful as '%' is meta in crontab, so it is hard to use date there. I wrote a 'date' wrapper that used '~' for '%', just for 'cron'. If the scripts that cron calls all immediately redirect their logging, you can use a shared log for all crontab lines that is fixed, as it is normally empty. Set up good logging. You deserve it. It is a great investment in your development speed (fast debug) and future (prod support much later).

Last edited by DGPickett; 03-06-2013 at 04:18 PM..
# 3  
Old 03-06-2013
In addition to what DGPickett said, I would suggest to be explicit regarding the absolute path to the rman executable:
export the ORACLE_HOME variable and use "$ORACLE_HOME"/bin/rman instead of just rman.
On some Linux distributions, for example, you may have more than one executable file named rman
(you could have /usr/bin/X11/rman for instance).
# 4  
Old 03-06-2013
Yes, the same environment that worked it interactively, including a $PATH to the right rman and any $OTHER_THINGS like that.
# 5  
Old 03-07-2013
try souring the ~/.profile for oracle user and as suggested by radoulov, DHPickett , use absolute path names.
# 6  
Old 03-07-2013
Thanks a lot everybody for help.

It works after I used as below

less /export/home/oracle/Tools/rman0.ksh
rman target / nocatalog @/export/home/oracle/Tools/rman0.rcv log="/u04/rmanbkup/log/rman-`date  +%y%m%d`.log"

# 7  
Old 03-07-2013
Welcome to the land of ssh, cron and at. When you log in, you are given environment by layers of files. If a pid runs not logged in, it has to build environment. Full absolute paths are just a weak stopgap for a bigger symptom. What if you need a dynamic lib*.so and your LD_LIBRARY_PATH is unset? Oracle has its own env needs.

If you want something simple, you can just "set >.runtime_env" and clone your environment. Some of it may be too specific to your login to be appropriate; it will be 'too much'. I do 'if' sections in my .profile for 'only if tty present', 'only if X', 'only if ksh' or 'only if bash', so it prunes itself down in cron, sh, ssh.
This User Gave Thanks to DGPickett For This Post:

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