CGI or ISAPI?

[10e5x]

Which should i use? CGI or ISAPI for Cognos 10.1.1? Now currently using CGI, will there be much difference?

[bdouglas]

It has been a while since I looked at this but from what I recall it is a matter of scalability.  If you are just testing using CGI is fine but if you are in production ISAPI is preferred.  The reason being that when a session is created in Cognos using CGI, a separate process is created which takes more memory.  Sessions can share a common process when using ISAPI (up to 256 sessions per process I believe) which allows you to utilize your resources more effectively.

[MFGF]

Stating the obvious, of course, but ISAPI is only valid with an IIS web server. If you are using Apache (or some derivative), Apache-mod is the preferred gateway protocol, and CGI for anything else.

Cheers!

MF.

[cognostechie]

MFGF - Is this behaviour for 10.1 ? As far as I remember, I installed 8.4 few years ago and configured ISAPI to work with Apache . I had to manually edit one file and insert some commands there but it was working with Apache too.

[10e5x]

Thanks everyone for the reply. Currently i am doing testing so i using CGI but will be proceeding to deploying it soon. I did a rough estimate. the most would probably be 200 users accessing cognos at the same time. Is that alot?

[MFGF]

MFGF - Is this behaviour for 10.1 ? As far as I remember, I installed 8.4 few years ago and configured ISAPI to work with Apache . I had to manually edit one file and insert some commands there but it was working with Apache too.

ISAPI is the native interface for IIS, and is supposed to give improved performance with IIS. While other web servers may have implemented an ISAPI interface, it's not going to be native to their technology, so would be less efficient with (say) Apache than Apache-mod, which is Apache's native interface.

MF.