Subj : Re: SGI: Need Something like 1 Mutual Exclusion Semaphore for Multible Programs
To   : comp.programming
From : clusardi2k
Date : Fri Jul 08 2005 11:21 am



Tony 'Nicoya' Mantler wrote:
> In article <1120742189.678926.138110@g49g2000cwa.googlegroups.com>,
>  clusardi2k@aol.com wrote:
>
> :    I have a assignment just thrown onto my desk.
> :
> :    What is the easiest way to solve it? Below is a brief
> : description of the task.
> :
> :    There are multible programs which use the same library routine
> : which is an interface to what I'll call a service program.
> :
> :    The problem is that only 1 request at a time can be serviced by
> : the service program.
>
> There's a few options. You can, in order of decreasing preference:
>
> * Fix your service program to queue requests
> * Add an intermediary service program that queues requests to the service program
> * Use some distributed API for locking (since you mention they're on different
> machines), like maybe MPI, PVM, or something like RPC
> * Use a reject-and-retry collision system
>
> You could also possibly parallelize your service program so that it can serve
> more than one request at a time, or make it transactional if it's not quite
> parallelizable. It all depends on what your service program actually does.
>
>
> Cheers - Tony 'Nicoya' Mantler :)

Thanks, but how is queuing requests different from parallelizing the
service 
program?

.