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
PHP onsubmit in the form not going to the fuction.
I have a form through ‘onsubmit’ calling a function validation(). But not going to the
strtotime issue
Hey all,
I'm playing around with some code, and basically the idea is:
Person changes
creating a 1 to 100 in a table
hi guys I am a newb in php need some help.
I have a table with 1 column and 100 rows and in
Probably a simple error...
I'm getting the error -- Parse error: syntax error, unexpected '{' in /home/content/c/s/t/csteffen24
Extract specific information from a PHP Multidimensional Array
Howdy! I've racked my brain over this for 24 hours now. I think it's time I asked for help. I'm lear
Multithreading in Oracle (Java, SQLJ, Pro*C,??) on 10g
I am investigating how to run a Java stored procedure in multithread mode.
I know that if I chang
Preserving user-entered linebreaks
Hi, I'm building a web 2.0 thingy from scratch and I wanna display text which users input. It's all
upgrade from 4.7 to ECC 6.0
Hi all,
we are going to do an upgrade from R/3 4.7 to ECC 6.0. I need to know if i can find som
Baffled by Undefined Index in Simple Array: Please Help!
Hello. I have a form which posts an array to this script. However, I can't seem to access the values
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