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
Converting numbers to months
The porgram works -just need the last function(month_convert_ to convert numbers to months -thanks.
array_combine() trouble w/csv file
I have a problem with a piece of code I wrote to import some records from a csv file into mysql. I h
problems with contact forms that are only protected against SQL injections
What could be a potential problem with contact forms that are only protected against SQL injections
Calling strings from other php class
I have test1.php{
$string1;
$string2;
....
... //10 strings in this class <
PHP and MySQL on intranet?
Is it possible to use both these on an intranet network?
Display search result
Hi!
I have a SQL database with information about albums and track (music).
This is wh
Force download script not handling files with spaces properly
I have a regular old php force download script, uses this code:
Code: header("Cache-Cont
How to calculate days from variable date?
This will be easy for one of you gurus. I want to fetch the date from a variable date, for example:<
Material Master Update through BAPI - Follow up material not updated
Hi Experts,
I am updating the material master through a custom transaction using the BAPI
Problem related to Creation of PDF File?
Hi All,
I am facing a problem related to creation pdf file. when I am creating a pdf file of do