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

Your Answer:

Login to answer

Other forums

MS Access data into a html table
Hi everyone, I am quite a novice at php but I have created some helpful scripts that fetch data
f

Navigation include for all site directories
Hi,

I need a navigation include that can deal with directories at different levels on a site.

weeks in a year
hi,

i found this snippet on php.net
QuoteFor the week number for weeks starting on Sunday:

Packet Design
Hi All,
Im new about network programming and I want to design a protocol but I have some question

my two tables
table1 : col1 = topicid , col2 = topic

table2 : col1 = sentid, col2 = sentence

Cod

Problem with the Update command used with a sqldataadapter
I'm connected to a database on an SQL Server and I'm using a sqldataadapter, sqlconnection, sqldatas

Am I setting up my sites oldschool?
Ok,

When I create a site I open a basic template that I have created that consists of a css f

Simple MySQL script is not working
Hey guys,

Just familiarizing myself with PHP and MySQL. I am following along in the O'Reilly

close site for maintenance
i get a tutorial, saying the following code can put our site offline, and only the developer can vie

Better Method of a Member Cloud
I assume most people know how tag clouds work, where the tags most used are bigger and the least use