Sequencing or queuing parallel process

Posted on 16th Feb 2014 07:03 pm by admin

Scenario is as follows
There is one parent process say P1 and 4 child processes say A B C D

Process A starts at 3:00 pm
Process B starts at 3:15 pm
Process C starts at 3:30 pm
Process D starts at 3:45 pm

Process A take 1 hour for completion and process B,C,D takes 10 mins for completion
At a time only one process is allowed to execute since these process shared some common resources so at any point of time only one process is allowed to execute. but these are scheduled job so process B, C, and D must wait till process A get completes

so process B must wait till 4:00 PM for execution
and starts at 4:00 PM
process C must start at 4:10 PM after completion of process A and B
process D must start at 4:20 PM after completion of process A and B and C
so these sequencing also should maintained

B, C and D cannot start unless and until A is get completed and user dose not know
How much time A will take so B,C and D must wait for completion of A and after A completes then and then only B,C and D execute in a same order

so how to implement wait mechanism for this scenario?

Currently i have implemented a lock mechanism where first process A will create a lock file and process B,C and D will continuously poll this lock file and as soon as process A finishes it will release a lock on and whichever process acquires a lock first will get executed first but here sequencing is not maintained and process executes randomly

so what kernel objects like event, semaphore are needed to solve this scenario.

please help to solve this scenario of process waiting for execution in a queue.

-Thanks

Your Answer:

Login to answer

Other forums

mail()
Hi all. I have a problem with emails. I am trying to set up a mail system where customers can subscr

Mouseover to edit (Ajax)
hi friends, can anyone help with the code behind to get this application working, please in VB (new

Creating a unique 'control panel' for each user
Hi there,

I'm thinking of designing a site that will allow users to sign up and have their ow

Calender Not Opening
The following code is not loading the javascript calender in another window. It's not doing anything

Need help making a blockquote and line items conditional
I have some code I bought a few years ago that allows my clients to update content on their site usi

On page view, minus credit
Hello all, please, I need a little help with this script. I am charging one credit (credits can be p

Displaying image pathname instead of image
Hello

Im trying to upload and then display images from a mysql database - Its only basic and

Number Format
Hi All,

I have number '000000000050085' I want to format it to 500.85 Can any one give me

Save cookie to DB
I'm working on a pixel tracking script for an incentive website and I need to use an ASP script to s

DYNPRO_FIELD_CONVERSION
Hi gurus,

I got a dump when I run one of my program. the dump is described below: