Programming

Extremely need to understand some aspects of pipes realization. The main question is in which memory are pipes placed?

pipes are files - so the data is on disk.

Since pipes are files the descriptor lives in process memory space. What are you trying to figure out?

Originally, pipes were implemented with the file system. Even then, they would be in the buffer cache and flushed to disk only if buffer cache pressure was high. These old pipes were one way only. I don't think any current Unix system still does this. BSD switched to socket based pipes. After System 5 got Streams, it switched to Streams based pipes. Both of these are bidirectional.

The system is Solaris 10.
What about streams? As I know pipes physically are cycled arrays of bytes. I have to figure out where are these arrays situated.

What is the impetus for your question?

Its such a specific question, I am curious what your original train of thought was. Not trying to pry too much, but I am curious. You didnt really say what it was in reference to.

Are you interested in the internal workings of Unix? I am also curious from time to time how things work and where they live on my boxes. And in what order things happen "behind the scenes"...

What is the impetus for your question? I think, you'd better ask "Who is the impetus for your question?"
I have an university course called "Operating systems", and he is my teacher Don't think I was born so curious. My study made me such I am

Well in that case I must call your attention to our rules, which state:
(6) Do not post classroom or homework problems.