How are railway reservation databases implemented?

[balaanand]

I m sure that railway reservation database system is implemented as distributed system... I need to know how it is designed...

[debasisdas]

Your question is too much theoritical to explain.

Kindly refer some good book for the same.

[pbmods]

Changed thread title to better describe the problem (did you know that threads whose titles do not follow the Posting Guidelines actually get FEWER responses?).

Now the only problem left to fix is to make the question more specific and easier to understand. That part's up to you, Balaanand.