I have found doing a "ps" command for your job name alone is just asking
for a world of pain, and very very unreliable for reasons that I will not
go into here. I like to create a lock file as the following ksh example
illustrates:
JOB_LOCK="/tmp/${0##*/}"
if [ -f ${JOB_LOCK} ]
then
cat ${JOB_LOCK} | read v_LOCK_PID
echo "Found job lock pid ${v_LOCK_PID}"
if ps -ef | grep " ${v_LOCK_PID} " | grep -v grep | grep ${0##*/}
>/dev/null
then
echo "Job lock pid ${v_LOCK_PID} is running"
exit
fi
echo "Job lock pid ${v_LOCK_PID} not found, removing old job lock"
rm ${JOB_LOCK}
fi
v_LOCK_PID=${$}
echo "${v_LOCK_PID}" >${JOB_LOCK}
echo "Created job file lock"
.
.the rest of your script goes here
.
rm ${JOB_LOCK}
PS: I'm looking for a new TV, think you could get me a deal at BestBuy with
your employee discount?
Brian P. MacLean
Oracle DBA, OCP8i
"Reddy, Madhusudana"
<Madhusudana.Reddy@b To: Multiple recipients of
list ORACLE-L <[EMAIL PROTECTED]>
estbuy.com> cc:
Sent by: Subject: RE: Unix Script ---
Archive Log Destination Issue
[EMAIL PROTECTED]
05/13/02 10:48 AM
Please respond to
ORACLE-L
My mistake , this new script is only working sometimes. Which is scheduled
every hour , but not working at all the hour changes .
-----Original Message-----
Sent: Monday, May 13, 2002 11:28 AM
To: Multiple recipients of list ORACLE-L
Hello All,
I have a script, which cleans up the archive log destination by moving the
old archive logs to a retention area based on the thresholds
1. Percent of space utilization
2. greater than 2 days old.
The script was working fine , except for the reason , sometimes we see
multiple copies of the same. So I have added the following to code just to
stop multiple copies. But now the script is not running at all and we did
see more than 90% space utilization archive log destination.
Here is the added code:
####################################################
# Exit If Already Running
####################################################
function ExitIfAlreadyRunning
{
copies=`ps -ef | grep OraProcessArch | grep "$SID_NAME" | grep -v grep | wc
-l`
if [ $copies -gt 2 ]
then
echo $(date)" Number Of Copies Running : $copies"
exit 0
else
return 0
fi
}
Any suggestions ???
I am not so good in using semaphores and all , looking for a simple
solution if possible ..
Thanks in advance,
Madhu
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