Re: multiple processes problems

Per Andersson wrote:
> I am about to invest time and effort into fastCGI.
> 
> Apache fastCGI in C has the ability to launch multiple processes of a fastCGI 
> application. Is there not a problem with this? If one has a database in RAM 
> memory (for speed), does this not mean that one can only have one process 
> runnning, otherwise there would be a difference in the contents of the RAM 
> database between different processes. Also if a fastCGI application writes and 
> reads to files, what happens if multiple processes tries to access the same open 
> file at once?
> 
> Does this no mean that allowing multiple procecess is problematic. And that it 
> is best only to allow one process of the application.

It will be up to you to manage this RAM database.  You could do it with 
a memory mapped file.  The interprocess locking can be tricky depending 
one what kind of granularity you need.  Personnaly when I have done this 
kind of thing in the past, I have later reverted to a more conventional 
database.  I was guilty of optimizing before determining it was needed. 
  Of couse your application may be different.

-- 
Bryan White

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