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 
9 
Other forums
php title problem
Hi,
I am having a problem managing my page title with PHP.
Currently I have my <
if statements problems
Hi. I'm trying to make a web form, but I kind of hit a dead end trying to figure out why it doesn't
help with image text
Hi ...
see i need the text of the name and number to start in the center and always be in the
PHP Surveys
I really would like some advice.
If you have a client come to you asking for a survey to be d
PHP and Javascript
Hi Guys,
Im trying to load the contents of an html file into a text area for editing, this is
Calculus Help (and by help I mean homework)
Hrmmm, I hate posting about math homework, partly because it's homework, and partly because I hate w
Appending GET data with form submition
Okay, what I'm trying to do is to use a form to append an already existing GET data string.
I
formating when pulling data from a mysql database
Ok so Im not to sure if this is the right thread to post in but here is my catch 22 issue.
I
extract content from a website
i have written a code that will grab the content from the index page..
i would like to know how c
Restricted access to sub-folder in iis6 doesn't work?
Basically I'm trying to add restriction to sub-folder (which contains pdf) in web.config for iis6 as
