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RE: DBMS Job vs C Daemon

From: Gene Sais <Gsais_at_co.palm-beach.fl.us>
Date: Fri, 15 Mar 2002 05:58:55 -0800
Message-ID: <F001.0042A7F6.20020315055855@fatcity.com>


I also agree, cron WORKS well ! The only thing I would add to cron jobs (shell scripts) is to use a semaphore file.

e..g.

---------------------------------------
semfile=/tmp/$0.RUNNING

if [ -f $semfile ] ; then exit ; fi
touch $semfile

DO SOME SHELL STUFF rm $semfile
exit

---------------------------------------

This way no matter how frequent you run the job or how long it takes the job to run, it still works. I had a developer run a job every 5 mins but the job took 15 mins to run, so you can guess what begins to happen after a few days :-)

Gene

>>> Rajendra.Jamadagni_at_espn.com 03/15/02 08:18AM >>>
While I agree that dbms_job is the right way, we had lots of problems with dbms_job suddenly failing (i.e. it just stops working) in 9011 and 9012 versions of database. Finally it was something to do with job queue processes, with the help of OWS we fixed it. BUT, I still don't trust dbms_job on our 9i production db and hence all critical jobs are run by our close friend 'cron', it works!.

Raj



Rajendra Jamadagni MIS, ESPN Inc.
Rajendra dot Jamadagni at ESPN dot com
Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.

QOTD: Any clod can have facts, but having an opinion is an art!

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Author: Gene Sais
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Received on Fri Mar 15 2002 - 07:58:55 CST

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