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
str_replace help
I am thinking str_replace is my only option to filter outputs from my database to convert them to sa
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
How to file_get_contents when login required?
Hello!
I am trying to read data from a page that you have to be logged into to view, I am try
Suggestions for Functional module
Hello experts,
I Have done B.Sc(Mathematics) and MCA & have learnt SAP/ABAP but do n
PHP submit form script causing blank page
Im trying to submit a form using this script, however nothing shows up on the page, does anyone know
Forms Authentication and Refresh at Login page
Hello,
When I try to press the Login button in my webapplication at my login.aspx page nothing h
Unifying logins of two different scripts
I have two different game scripts which I want to embed on my own site. The problem is I don't want
SAP Logon Failed
I tried to login to SAP through MMC.
When i click start and give password.
it
mails going in spam??
The mails I sent to folks in my database using mail(function) are going in spam??
Any idea ho
passing an array of objects after submit
How do I do this? This is what I have tried and it is not working.
<form method="