1 Why is NFS a stateless system What inherent disadvantages

1.     Why is NFS a “stateless” system? What inherent disadvantages does this cause?

2. What is the “retransmission problem,” and what are two techniques for overcoming it?

Solution

NFS was developed as a stateless system to maintain simplicity in server side implementation. In a stateless system each request is handled exclusively thus allowing server to reboot even when client is making request.

Disadvantages due to \"Stateless\" protocol :-

1) File Consistency :- It assumes that flag between machines are synchronized and no check is performed between server and client to assure the consistency of the file.

2) File Locking :- In file locking server maintains the log regarding which processes are having lock on a given file. But being stateless everything is indepedent from client and server.

3) Authentication Check : Each request undergoes authentication process to make sure they have access permissions to NFS server.