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
9
Other forums
Display Database
I need to create a shopping cart. I found this code online: http://conceptlogic.com/jcart/
Unfort
Why is this function returning a false value when it shouldn't be??
This is in an include file. I want it to check a value in an html form and see if it's just white s
Parse String
I need to parse the string below into three variables. How would I do that?
john + 10/20/2008
Target costs on Process orders not calculating
Hi All,
We have released standard costs for all the materials. We have also done Goods r
writing a screen scraper
Hello,
I'm writing a screen scraper application and want to be able to get absolute addresses
Is this possible? If one file assigned to an ID...
I have a page that lists property listings assigned to a specific user (a manage page), with brief t
Inter Company -- Resources Related Billing (Services Industry)
Hello,
My company has a scenario where:
Company A bills Company C for INTER (cross
$_FILES array
Ok,
I just started experimenting with PHP today. My goal right now is to have people be able
if php cookie set, show code...
Hi all.. I need to figure out this little snippet right quick.. seems like it should be easy enough
How would I convert this into code using an if statement?
ES equals exam score m equals $mean s equals $total. I already coded my mean and total so I'm not g