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
Did you know?Explore Trending and Topic pages for more stories like this.
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
No comments posted yet

Your Answer:

Login to answer
342 Like 9 Dislike
Previous forums Next forums
Other forums

max function question
Hi All
Ihave a table that holds shipment numbers and dates like this

select * from

A little help needed passing hidden values to next page
I have a page that has hidden values in a form.

example
Code: <input name='signupID

How to generate a random array of integers subject to a certain constraint
I am writing a program that asks the user to enter an integer N and then generates a random array of

gmdate() - want 1 hr before time
Hi,
I am using php gmdate().
Now I am entering all dates in my dbase using gmdate("Y-m-d

IIS & NW MII on the same server
Hi,

We're weighing the possibility to run both IIS and MII (NetWeaver) on the same server

PHP, jAVASCRIPT setting input values, why isn't it working?
Hi:

I am calling this javascript:
<script language="javascript">

Saving data from a form into a file
Hey everybody,

Sorry, I am really new to PHP coding and such but a project kind of got thrust

data type in column definition
Hi,
I create a table with column called "Direction of Travel code ".
The travel codes in t

generate seo frienly url from a text like wordpress
Convert: "åäö" to "aao", "space" to "-", "!?&q

Multiple upload and Resize
I would like some help on my script I have the for my index.php

////

<html&

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash