[fpc-pascal] A question or two regarding the FPC

[Hans Mårtensson]

Mattias Gaertner wrote:

>On Fri, 8 May 2009 14:35:52 -0300
>Gustavo Enrique Jimenez <gejimenez at gmail.com> wrote:
>
>  
>
>>Hi Nino:
>>
>> I am using FPC since 2000-2001. I use it for data aquisition and
>>temperature control. Console programs compiled with FPC 1.x work for
>>days, even weeks. In the "Laboratorio de Física del Sólido, Tucumán -
>>Argentina" (Solid state physics laboratory) we have used programs
>>compiled with FPC to grow YBACuO superconductor crystals. This process
>>take weeks.
>> This heat treatment is the only "mission critical application" that I
>>know well, and FPC works reliably, even for weeks, on linux machines.
>>    
>>
>
>Some of my fpc programs run for months on linux clusters and some multi threaded daemons on OS X til reboot. 
>So far: No long time crashes or mem leaks.
>
>But I second Jonas mail: Before you run an fpc program in a
>zero-tolerance environment, you have to test a lot of things, because a
>lot of code was not written with zero-tolerance in mind.
>
>Mattias
>

I could add my experience:
I have made a system for controling the internet connection for a 
network of nearly 100 computers.The system checks passwords, set up 
permissions, takes care of the full log of internet traffic, regularly 
extracting informations from the log files (which is a huge amount of 
data). The system is a daimon program, compiled with FreePascal, running 
on an Ubuntu Linux OS. The computer with this system has now been 
running for more that a year without interruption, without reboot, and 
without any sign of any problem.

But then, in case of zero-tolerance, if you trust the compiler, what 
about the OS? and, worst, what about your program?
I wouldn't trust the reliability of anything before the full system has 
been tested under working conditions.

Hans Mårtensson

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