DBMS vs unix Cron job

We have a web application using Oracle 8.1.7. When the user enters a process button on the web we want to run the procedure in the background and we also have some jobs that needs to be run in a scheduled time. My dba is telling us to use cron in place of dbms job. He thinks it is easy to maintain. Are there any new utilities in 8i besides dbms job. Can some body give me pros and cons on these processes.
thank you

DBMS_JOB only runs PL/SQL. If you need to do OS stuff as well, then a shell script is your only man, hence cron.
For pure database jobs, then I would suggest that DBMS_JOB is a better bet, primarily because you don't have the problem with using two different clocks. Generally I find it easier to manage everything from the database. Howver if your DBA has lots of existing cron jobs for OS things that he needs to co-ordinate with these database things then cron probably will make live easier for him.
As for runninmg stuff from a user command, I would suggest that DBMS_JOB is the way to go, because it can handle a one-off submission. Again, unless there's lots of OS activity that needs to be managed as well.
rgds, APC

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Running a JAVA application as a Unix Cron Job

I'm trying to run a 3rd party java application on a Unix (Solaris) system. I want to run it from a script so that I can put it in the cron schedule. The problem is that it won't run as a pure batch script. It seems to really want a DISPLAY device assigned to the shell, even though it never displays anything to that device. The vendor claims that he is not using any DISPLAY functionality.
Here's my script;
#!/bin/sh
# PARAMETER 1 (%1): name (without .tif)
# PARAMETER 2 (%2): type (CAMS or MACS)
# PARAMETER 3 (%3): level (1, 2, or 3)
export myCP=./Extract.zip:lib/jai_codec.jar:lib/jai_core.jar:lib/mlibwrapper_jai.jar
export DISPLAY=(some xhost unix workstation's IP address)
java -classpath $myCP extract.ByteConvertOne $1 $2 $3 > byteconvertone.log 2>&1
If I run this script with the "export DISPLAY" in place, it runs fine. If I comment out the "export DISPLAY" line, it hangs and will never execute or error out.
Is there some other redirect, or system property setting I need to change to make this work?
Help

only idea is to set system wide the DISPLAY to :0
for examples in
/etc/profile :
export DISPLAY=:0
btw: AFAIK when you instantiate swing or awt classes they require an X server running and the DISPLAY variable to be set. Perhaps that is a clue, why you need this.

UNIX Command to run cron jobs

Is there a UNIX command I can send to the target machines to force them to run the 'Daily, Weekly, & Monthly' cron jobs?
Do you guys know of a place that I can find useful commands to send to the machines?

Send:
periodic weekly
This command will run, right now, all the system maintenance commands which normally run via cron only at 4:30 on Saturday morning. To see the actual maintenance commands that are going to be executed, look in /etc/periodic/weekly. You can also do "periodic daily" or "periodic monthly".

How to take the cron job log in HP UX?

Hi,
How to take the cron job log in HP UX
I need to run a backup and other stuff everyday. How do I check and start cron service under HP-UX UNIX operating system? How do I write cron jobs?
A. Cron service is required to run jobs and tasks such as backup.
You must login as the root to run following commands. Each user that is using the cron service must have a cron configuration file in the /var/spool/cron/crontab directory. Also users are permitted if their name appeared in /var/adm/cron/cron.allow file
Task: Find out if cron is running under HP-UX
Type the following command at a shell prompt
# ps -ef | grep cron
Open /etc/rc.config.d/cron file
vi /etc/rc.config.d/cron
Set control variable to 1 to enable cron: CRON=1
Set control variable to 0 to disable: CRON=0
Close and save the file. To start or stop cron you can type the following command:
# /sbin/init.d/cron start <-- start cron
# /sbin/init.d/cron stop <-- stop cron
Task: HP-UX Start cron service
If cron is not running, simply type:
# cron
Task: Edit / create cron jobs
Type the following command to submit a cron job:
# crontab -e
List your cron file:
# crontab -l
Backup all your cron jobs:
# crontab -l > ~/backup.cron.jobs
Remove ALL cron job:
# crontab -r
Task: Crontab file format
Cron file format is as follows:
MIN HOUR DATE MONTH DAY /PATH/TO/COMMAND
0-59 0-23 1-31 1-12 0-6 /root/scripts/backup2tape.shEasy to remember crontab file format:
* * * * * command to be executed
| | | | |
| | | | ----- Day of week (0 - 7) (Sunday=0 or 7)
| | | ------- Month (1 - 12)
| | --------- Day of month (1 - 31)
| ----------- Hour (0 - 23)
------------- Minute (0 - 59)To run /root/script/backup at 23:00, every day, enter:
# crontab -e
Append following
0 23 * * * /root/script/backupRun foo job very weekday (MON-Fri) at 6am, enter:
0 6 * * 1-5 /root/script/backupFor more information refer to cron and crontab man pages.
Subscribe to our free e-mail newsletter or RSS feed to get all updates. You can Email this page to a friend.
Related Other Helpful FAQs:
What is Cron?
Linux Start and stop the cron or crond service
Run crontab Every 10 Minutes
Linux / UNIX Setup and run php script as a cron job
Stop Ubuntu / Debian Linux From Deleting /tmp Files on Boot
Discussion on This FAQDavid Says:
January 15th, 2008 at 12:21 am
You might note that all files normally found in /etc/init.d, /etc/rc*.d, and others are all in /sbin in HP-UX 10.20 and up.
Note too that your formatting is off in the description of the /etc/rc.config.d/cron file. Also, if you run /usr/bin/cron instead of /sbin/init.d/cron start, the /etc/rc.config.d/cron file is not used.
Regards,
Satya

I guess it would :)
btw, how did this piece miss from the contents pasted by the OP ?
The doc has given all details of CRON and missed where to see the logfiles. :)
****Added****
I tried man crontab in windows, i dont see it.i overlook most of the things, i would have done the same ;)
Edited by: Bobcatalog on Oct 23, 2008 9:40 AM

Cron job help- Need to run the Autobuddy command every night...

I have not written anything in the form of a Unix script for YEARS and YEARS. Our XServe was built in Advanced mode, currently running 10.5.4 Server. On this box, we are running Wiki and iChat. Since we built this box as an Advanced box the "Autobuddy" option was not available.
I have since enabled it at the command line, but I am told by Apple that there still needs to be a command run after every time a user logs in if you want others to Autobuddy. That command is this:
"sudo /usr/bin/jabber_autobuddy -m"
Now I think this would be pretty easy to setup as an automatic cron script, but like I said, I have not written something like this in forever. Not to mention, I am not 100% sure what needs to happen since running the script with an sudo command will prompt for the root password.
I was wondering if anyone would be able to help me write the script up, and give me some instructions on how to install it. I just want it run everyday, midnight is fine, I don't really care. All I know is that we have a dept of 150 people, and it grows and shrinks all the time. They can deal with a new user not being seen for 24-48 hours, I just want to get this automated.
Any helps would be GREATLY appreciated!
Thanks
Tom

If you want to keep it simple try [CronniX|http://www.abstracture.de/projects-en/cronnix] a graphical tool for setting up CRON jobs on OSX. Whilst I have not actually done an autobuuddy in this way, I cannot see any reason why it will not run as a Cron Job.
The proper way ideally would be to use the launchd service.
Something like this should work:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>org.jabber.dailyautobuddy</string>
<key>ProgramArguments</key>
<array>
<string>/usr/bin/jabber_autobuddy</string>
<string>-m</string>
</array>
<key>LowPriorityIO</key>
<true/>
<key><UserName></key>
<string>admin</string>
<key>StartCalendarInterval</key>
<dict>
<key>Hour</key>
<integer>0</integer>
<key>Minute</key>
<integer>05</integer>
</dict>
</dict>
</plist>
(not sure why, but tabs are not showing up, making this hard to read)
Message was edited by: Tim Harris

Manually running a cron job in SunOS 5.8

I was looking in the Solaris documentation and UNIX Man pages, however how do I manually run a cron job that is already set-up? I am troubleshooting an issue and the cron job runs just fine during the night, I would like to execute it manually for testing purposes. Thank you in advance.

Run this command :
crontab -l
And, look for the command you want to run and then just execute it on command line. The first five columns (separated by spaces) are date/time/day (skip those), after that you will see full path of the script/program. Just copy and paste that full path on command line.

Help Please : Cron Job to automate load process

Hi
I am trying to automate data load process. I am loading data into a number of tables from flat files.
Currently I have a UNIX (SunOS) file with a bunch of SQLLDR commands and I changed permission on this file to executable. Every morning I execute this file to load data.
Now I want to automate this process by writing a cron job and scheduling it. I am running into a number of problems. I exported ORACLE_SID, ORACLE_HOME and PATH still cron is unable to find SQLLDR.
Whatelse am I missing. Here is my command file and cron file.
Please help!?!?!?
ORAENV VARiables
export ORACLE_HOME=/export/opt/oracle/product/8.1.6
export ORACLE_SID=fid1
export PATH=$PATH:$ORACLE_HOME/bin
.profile
. $HOME/oraenv
daily_full.sql file
export ORACLE_SID ORACLE_HOME PATH
sqlldr userid=user/pwd control=acct.ctl log=acct.log
sqlldr .......
Cron Job
16 11 * * 1-5 /apps/fire/data/loadscripts/daily_full.sql >> /apps/fire/data/loadscripts/fulllog.log 2>&1
Output fulllog.log file
/apps/fire/data/loadscripts/daily_full.sql: sqlldr: not found
/apps/fire/data/loadscripts/daily_full.sql: sqlldr: not found
Thanks
Shanthi

Hi Ramayanapu,
first; you have written a shell-script not an sql-script. Please rename your file from daily_full.sql to daily_full.sh
I suggest that you use the cronjob from a user who has the enviroment with the variables ORACLE_SID and ORACLE_HOME.
In this case cron will operate from the $HOME variable of this user.
Perhaps your export will destroy the .kshrc setting. The statement has no effect in your script, please remove it.
Rename your sqlldr-Statement as follows;
$ORACLE_HOME/bin/sqlldr userid=user/pwd control=<path>acct.ctl log=acct.log
<path> will placed with the path of your controlfile.
Your user/pwd will correspond with a ORACLE user who has the right to insert in the destination table.
Your logfile will be place in the %HOME directory.
Hope that i could help to solve your problems
with kind regards
Hans-Peter

Solution Manager 7.1 - Monitor scripts which runs as cron job at OS level ?

Hi All,
We have Solution Manager 7.1 in our landscape and we have configured RCA, Monitoring.. Is it possible to Monitor the scripts running as Cron Job at the OS level?
If in case, the script stops due to an issue, we need to get the alert in Solution Manager.
Also can you please let us know whether it is possible to monitor jobs scheduled through external job scheduling tool.
Thanks & Regards,
Vaishali.K

Hi,
How to Schedule the background Job at the OS level:
Invoke a sapevent using a OS script and then have a SAP background job set to run on a sapevent. I say this assuming Unix and a job in crontab. I would guess the same thing could be done on a Windows system.
sapevt TRIGGER_NAME -t
pf=d:usrsapDEVsysprofileDEV_DVEBMGS00_SVRNAME nr
Kindly go through the links,hope this will help you out
[Steps to configure RCA and Monitoring in SolMan;
[http://help.sap.com/saphelp_45b/helpdata/en/c4/3a7ef8505211d189550000e829fbbd/content.htm]
Thanks & Regards
Ajitabh

Cron job status

Hi All
I had configured 1 cron job (in Unix and script is also in unix ) long back. But presently I dont know this job is running or not? Please suggest how to look this cron job is running or not?
Please help me out..
Thanks,
Siva

Hello Siva
ps -ef|grep cron
If it won't work - try to look for your cron
# crontab -l
or the other solution :
configure a mail for the scripts in the cron tab. hope this will solve your problem.
# Purpose : To email to India, Hyderabad Backup Adminl
if [ "$fbackup_status" = "0" ]
then
mail_file="/tmp/root/online.results"
echo "Backup Completed Successfully, Return Code: $fbackup_status" >> $mail_file
mt -f /dev/rmt/0m offline
else
     if [ "$fbackup_status" = "4" ]
     then
          mail_file="/tmp/root/online.results"
          echo "Backup Completed with Warnings, Return Code: $fbackup_status" >> $mail_file
          mt -t /dev/rmt/0m offline
     else
          mail_file="/tmp/root/online.results"
          echo "\n Backup [ FAIL ], Return Code: $fbackup_status" >> $mail_file
     fi
fi
for mail in [email protected]
do
mailx -s "aperp1 Backup Report" $mail < $mail_file
done
# remember to include this in your script
Cheers
Ravi
http://ravidba-oracle.blogspot.com/

Environment setting for cron job

What are necessary oracle varaibles to run a oracle job from crontab.
does any one has some example. I can run er export job from the command line but when i scheduled that from crontab, it did not run. I need to set environment for that but my knowledge in unix is close to zero. ur help will be hughly appreciated. Thanks

Basically following 3 variable needed to run cron job
ORACLE_SID=<SID>
ORACLE_HOME=<ORACLE_HOME>
PATH=$ORACLE_HOME/bin;$PATH
- Virag

How to have cron jobs email to an exchange server

How do you setup a cron job so that i can send its results to an email server such as exchange?
I want to dump the results of a cronjob and then email this results to an account on a exchange server
please help?

to redirect the mail message to a non priveleged account create a[b] .forward file in the / directory with a single line entry containing the user to receive the forwarded mail.
In outlook create a new mail account using POP3.
The mail server should be your UNIX server, might have to use the IP address rather than the host name.
The login details should be your UNIX account and password. Dont believe the email address is important as you are only downloading mail from the server.
This is basically the same as you do from home when dialling into your ISP and dowloading mail.
Not sure if this is a solution as it doesnt use an exchange server but it does get your mail.
Your mail program should be able to handle receiving emails from multiple sources ie your exchange server and a pop3 account

Cron jobs in relatio to SAP

Hi experts,
can you please tell me about CRON Jobs. I searched a lot but did not found any satisfactory answer.

Hi
cron is a unix, solaris utility that allows tasks to be automatically run in the background at regular intervals by the cron daemon. These tasks are often termed as cron jobs in unix , solaris
Refer to http://www.adminschoice.com/docs/crontab.htm
and
http://aplawrence.com/Basics/bbcronbasics.html for more detailed info
when you talk in relation to SAP,refer to below link
http://help.sap.com/saphelp_nwce10/helpdata/en/45/48bae292ab4024e10000000a1553f6/frameset.htm
Rohit

Cron job: grpck or grpconv?

This is a very general administration question. In archlinux (as in many other linux distributions and unix systems I have used in the past) there is a daily cronjob which runs pwck -r and grpck -r. When I look at their outputs sent to me by the internal mail system I often find that /etc/group and /etc/gshadow are not synchronized (generally there are new groups and users added to a certain group in /etc/group but not in /etc/gshadow). I can fix this easily with grpconv. However I am wondering if it is safe to replace grpck -r with grpconv as a daily cronjob. Would it be dangerous for some reason I am unable to foresee? Is there any reason why I should coordinate the two files by hand, or why I could want them to be out of sync?

Run
crontab -l
05 1 * * * /home/mysql/admin/run_dailyTo check what cron jobs scheduled for the user.
The cron job script should be self-contained and coded to put output to specific logfile in your preferred directory. On screen output is usually blocked because no-one will be around to check them real time.

Cron job not running - script uses rsync, ssh (with id_rsa)

Does anyone know how to get cron to run a rsync/ssh script which uses id_rsa for passwordless logins?
I have a backup script I have slaved for months over that works wonderfully when running it from the command line.
It uses rsync and connects with SSH (passwordless using ssh keys). I have setup id_rsa and id_rsa.pub for passwordless logins (this is my user account, and connects using root@ to the server)
As stated all works find when run from the command line. But when I setup a cron job to run this file (exact same line I run from the command line) it does not execute. Actually, it does run, as I have an email notifiction which sends to me. It is just the rsync/ssh part that does not run.
I have spent days and days trying to figure it out. No error messages occur, nothing. Took me a while to find out cron is emailing the user account on Lion the messages (not to a proper email address).
The error shows a permission denied, which I believe to be the cron user cannot use the id_rsa/ssh connection.
Cron is running the script as my user, the same I use on the command line. I even tried copying the id_rsa to the root user .ssh folder in case cron is running as root but that does not work either.
So does anyone know how to get cron to run this rsync/ssh script which used id_rsa for passwordless logins?
Thanks a lot

YES! Got it working, finally!
So the issue is indeed cron/launchd not being able to access the ssh-agent which holds the key.
So this is the solution...
Download keychain for Mac:
http://www.funtoo.org/wiki/Keychain
Then once its installed and configured, the script to run needs this added to the top:
eval `keychain --noask --eval id_rsa` || exit 1
Note I am using id_rsa whereas keychains instructions refer to id_dsa so I just changed it and it works OK.
When the script runs the first time it asks for the key password. Then it works from then on.
What I do not know yet is will I need to re-enter the password when I logoff/logon again. That will cause an issue as I auto restart the Mac every day which means if I am off for a few days backup will stop (can you see the madness in this issue!).

Need help with a cron job

What I want to do is run an Applescript every 6 hours and 1 minute. If the computer is asleep when the job comes due, I want it to execute the script and reset the counter. Can crontab do this? If so, how to set it up?

Gnarlodious wrote:
Then skip it, I can see there is no easy way.
I don't think it's that hard, though. Just a bit tricky. I was just a bit confused on what exactly you wanted.
I could write a stay-open Applescript application, but I wanted to avoid cluttering up the Dock just to run a command every 6 hours.
Nah, I wouldn't want that either.
If I were doing something like this and I wanted it to work like this:
1. Run every six hours, at 6 AM, noon, 6 PM, and midnight.
2. Run after waking up if the computer has been asleep and missed any of the times in between, say if you let the computer sleep thru the 6 AM job.
I'd do this:
1. Call the AppleScript periodically from a cron job. How often would be dependent on how tight you want the times to be to when you wake up.
2. Have the AppleScript save a text file somewhere with the time when it runs. That way, if your computer is asleep at 6 AM, the script could use this to decide if it missed running while it was asleep.
3. Have your script check this time and if it's over 6 hours, let the script do its thing. If not, then just exit, to try all this again the next time cron runs it.
Here's kind of a pseudo-code way of describing it:
check if it's 6:01, 12:01, 18:01, 00:01
if yes:
do your AppleScript business
save the current time in a file
exit
if it's not one of those times:
check if it's been over 6 hours since the AppleScript did its business
if yes:
do the AppleScript business
save the current time in a file
exit
if no:
exit
Then you could do two cron jobs:
1 */6 * * * /path/to/applescript
*/5 * * * * /path/to/applescript
The first one would run at your appointed times. The second would just run every 5 minutes to catch those times when the computer was asleep. The "5" could also be "10" for every ten minutes. Or whatever you decide you'd like.
I'd show you an AppleScript, but I'm really not so good at that. If a Perl script would help, I could whip one up pretty quickly, I think.
charlie

DBMS vs unix Cron job

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