Multiple Process issue Post: 302213219

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Top Forums UNIX for Dummies Questions & Answers Multiple Process issue Post 302213219 by jntgopal on Wednesday 9th of July 2008 01:41:02 PM

07-09-2008

Registered User

Multiple Process issue

Hello all,

First of all, I want to thank the forum for being so helpful to me in many occasions. I have searched through the forums and the internet. I couldnt find a perfect solution for my issue. Here is what Im trying to do..

Im verifying a bunch of jobs whether they are completed or not and start the next set. We have two sets of jobs one is LongRunning(LR) and the other SR jobs. The SR jobs are in sets of 7 and the LR are by themselves. We have to start the next set of jobs after completion of the first set.. For ex..

LR1 Job1
LR2 Job2
SR1 Job3
SR1 Job4
SR1 Job5
SR1 Job6
SR1 Job7
SR1 Job8
SR1 Job9
LR3 Job10
LR4 Job11
SR2 Job12
SR2 Job13
SR2 ....

LR1, LR2 and SR1 starts simultaneously. I need to check for LR1 completion to start the LR3 and LR2's completion to start LR4. But on the other hand, I have to wait for all the SR1 jobs to complete to start SR2 jobs. The SR jobs runs much faster than the LR jobs.

What I have done so far is ; Verify the LR jobs and write to 2 different files, completedLR.txt if it is completed and to runningLR.txt if it is still running. Simultaneously, I verify the SRjobs for completion. Its working for the first time. What Im having trouble with is to check the jobs after 3mins. Im having trouble in putting them into a loop where it will keep checking and also continue with starting the next set of jobs at the same time.

My main program calls a subprogram ;

main.sh
--- checkcomp.sh LR &
--- checkcomp.sh SR &
verify the completedLR.txt and go to the next set of jobs.

All the starting and verification of completion are against oracle tables. I have to just update the tables with timestamp for it to start the job and verify the stoptime for completion. Im very much confused to find a way to run one process which will keep checking the completion every 3mins and the other one to proceed further with the next and then the next set of jobs continuously.

Im not that wellversed in Unix. Any kind of help would be much appreciated. Im new to this forum as well. If I havent clarified anything clearly to help further, please let me know.

Thanks much in advance
Jay

jntgopal

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LEARN ABOUT OSF1

select_wakeup

select_wakeup(9r)														 select_wakeup(9r)

NAME

       select_wakeup - General: Wakes up a kernel thread

SYNOPSIS

       void select_wakeup(
	       sel_queue_t *selq );

ARGUMENTS

       Specifies a pointer to a sel_queue structure.

DESCRIPTION

       The  select_wakeup  routine  wakes  up  a  kernel thread that is suspended while waiting for an event on the specified device. A user-level
       process can use the select system call to cause the process to be suspended while waiting for an event to happen on a device. For  example,
       a  graphics  application  may issue a select call while waiting for mouse or keyboard input to arrive. In this case the process would issue
       the select system call, which would indirectly call the graphics driver's select routine (through the driver's select entry  point  in  the
       dsent  table)  to  determine if any input is available. If input is available, the select call may return immediately.  If no input is cur-
       rently available, the graphics driver would suspend the process until input arrived.

       For this example, when the graphics driver has received input (typically through its interrupt handler), it causes any processes  suspended
       from  calling  select  to continue by calling the select_wakeup routine.  This causes any process currently suspended on the select channel
       (as specified by the selq argument) to resume.

RETURN VALUES

       None

SEE ALSO

       Routines: select_dequeue(9r), select_dequeue_all(9r), select_enqueue(9r)

       System Calls: select(2)

																 select_wakeup(9r)

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