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Shell Programming and Scripting
Trigger a script by consequtive scripts in crontab
Post 302377509 by EAGL€ on Friday 4th of December 2009 08:38:10 AM
12-04-2009
Trigger a script by consequtive scripts in crontab
Hello Friends,
I've been searching solutions for an exceptional backup case recently, I need someone to guide me, suggest a method pls.
In a production system we have backup scripts, they are run by cron one after another, and monthly. There is 1 hour difference between each consecutive script in crontab and we transfer data to a magnetic TAPE. Exceptional case happens when the following items occur at once:
1. TAPE is full (End-of-TAPE is reached) when one of backup script is running.
(The interrupted script -which is ufsdump process in script- waits until new TAPE is placed, it automatically detects replacement of new TAPE and continue the rest of process).
2. Alarms are not observed by system admin so they forget to replace a new TAPE until next script. It is time for next script to be run (current interrupted script is not completed yet). However queued crontab script cannot be run because TAPE is full, so one backup is missing as a result.
I would like to find out if i can trigger the script (which was not run on time) from inside next script? Adding some extra parts and checking output logs of ufsdump can i put extra control? There are special words like "attention,done,finished" in logs after interrupted "ufsdump" process is completed with placing new TAPE.
But what makes me confuse is that i do not know when new TAPE is placed? so you know i can not guess how many scripts will not run because of this so how many scripts will be triggered later
Advise me please
Regards
I've been searching solutions for an exceptional backup case recently, I need someone to guide me, suggest a method pls.
In a production system we have backup scripts, they are run by cron one after another, and monthly. There is 1 hour difference between each consecutive script in crontab and we transfer data to a magnetic TAPE. Exceptional case happens when the following items occur at once:
1. TAPE is full (End-of-TAPE is reached) when one of backup script is running.
(The interrupted script -which is ufsdump process in script- waits until new TAPE is placed, it automatically detects replacement of new TAPE and continue the rest of process).
2. Alarms are not observed by system admin so they forget to replace a new TAPE until next script. It is time for next script to be run (current interrupted script is not completed yet). However queued crontab script cannot be run because TAPE is full, so one backup is missing as a result.
I would like to find out if i can trigger the script (which was not run on time) from inside next script? Adding some extra parts and checking output logs of ufsdump can i put extra control? There are special words like "attention,done,finished" in logs after interrupted "ufsdump" process is completed with placing new TAPE.
But what makes me confuse is that i do not know when new TAPE is placed? so you know i can not guess how many scripts will not run because of this so how many scripts will be triggered later
Advise me please
Regards
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LEARN ABOUT OSF1
uudemon.cleanu
uudemon(4) Kernel Interfaces Manual uudemon(4) NAME
uudemon.admin, uudemon.cleanu, uudemon.hour, uudemon.poll - Administrative shell scripts for polling remote systems, cleaning up spool directories, reporting status to the system administrator, and routine invocations of the uuxqt and uusched daemons SYNOPSIS
These shell scripts reside in the following directory: /usr/lib/uucp DESCRIPTION
All the scripts can be run from the command line or can be run automatically by the cron daemon. To automatically run the scripts, remove the comment character (#) from the beginning of the relevant line in the /var/spool/cron/crontabs/uucp file. This script reports status to the system administrator. It issues the uustat command to find out the status of uucp jobs. It mails the results to the uucp login ID. The script may be modified to send mail to any login ID such as the uucp administrative login ID (uucpa) or root. This script cleans up the /var/spool/uucp and /var/spool/uucppublic directories by running the uucleanup command. The uucleanup com- mand is run with the following parameters: -C7, -D7, X2, -o2, -W1. This script runs the uusched and uuxqt daemons in the background. This script polls the systems listed in the /usr/lib/uucp/Poll file. The uudemon.poll script should be scheduled before the uudemon.hour script. This allows uudemon.poll to create any command files before cron runs the uudemon.hour script. FILES
Contains the uudemon.admin, uudemon.cleanu, uudemon.hour and uudemon.poll files. Contains the uucp file. RELATED INFORMATION
Commands: cron(8), uucleanup(8), uusched(8), uuxqt(1) Files: /usr/lib/uucp delim off uudemon(4)