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
How can I uploading Transactional Data from Legacy to New SAP system
Hell Gurus,
I am overwhelmed with questions on how to migrate huge volume of Sales Orders
mysql_query returning boolean instead of mysql ressource
Hi,
I seem to have a weird issue with the php command mysql_query. I pass 2 arguments the que
ImageCreate()
When I create an image and add text to it I want my text to be replaced with a PNG image, because th
Insert to MySQL inside foreach
Hey.
I am parsing some html, and putting inside an html db.
I need to create a randomized inte
getting rid of quotes in strings
sick of trying to deal with them in multiple ways (entering in and taking from database, echoing, ec
MASS PM
Hello all, I'm trying to send mass private messages to users in my database but keep getting an erro
extract data
Code: <div class="post hentry uncustomized-post-template">
curl javascript problem
Hi Experts.
I'm new curl and wanna to get some info from this http://www.amadeus.net/
when
present value of sequence?
Hi
Please help me to find out the present value of sequence?
Thanks
Send inserts to mysql thru port 80
Hi!
I have an application that must do some inserts in a mysql db. This db is behind a firewa