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

No comments posted yet

Your Answer:

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

Hyperlink is adding an extra gap to variable
Hi, here's my problem..

I have a php generated page with a hyperlink which opens in a new win

random generation
hi

i need help with generating this

numbers from 1-12

i want to generate in ran

insert Multiple rows into the table from that table data
Hi All,

I have a requirement like to insert mulitple rows into the table from that

PHP friend keyword equivalent
is there a PHP equivalent for the C++ friend keyword?

Schedule editor
Hi,

I have a question related to Schedule editor.
If we schedule a BLS for every 30

Why does my crawler script suddenly end with no error?
Hi.

I have written a web crawler script. It will visit a large number of URL's with cURL.

mysql UNION | warning mysql_fetch_array !!
Code: <?php
$i = 0;
$query1="SELECT * FROM `products` WHERE `div

New Search Engine problem
Hey everyone,

I have a ZIP Code Radius search engine already functional. it displays all of t

Ariba 9r - SAP MM Integration
Hi experts,

The standard Ariba adapter for 9r creates a relationship between Cost Centers

validating url
im trying to validate url's sent to me by a form
the url's im collecting are for placing banners

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