topic Re: networking in Operating System - HP-UX

networking

Indrajit Bhagat — Tue, 28 Aug 2007 08:53:10 GMT

what is the difference between the rpc and portmap.

Re: networking

Pete Randall — Tue, 28 Aug 2007 08:56:06 GMT

I would suggest reading the man page for rpc and comparing it to the rpcbind man page.

Pete

Re: networking

Torsten. — Tue, 28 Aug 2007 08:59:06 GMT

RPC (Remote procedure call) is a model of communication used to exchange data between different processes, see
http://en.wikipedia.org/wiki/Rpc

portmapper is part of this communication, see
http://en.wikipedia.org/wiki/Portmap

Re: networking

tkc — Tue, 28 Aug 2007 09:17:16 GMT

RPC is Remote Procedure Call, a communication model.
portmap is the daemon in HP-UX 10.20 that converts rpc program numbers into port numbers. in HP-UX 11.x, it's called rpcbind.

Re: networking

Torsten. — Tue, 28 Aug 2007 09:35:08 GMT

As you can see now, asking for a difference between rpc and portmap is just like asking for the difference between an apple and an apple-tree.

The main idea behind all the interprocess communication models is this:
How to make the communication between processes (running on different systems and even operating systems) easy and reliable?

There came up a lot of solutions over the years, like rpc, NET, CORBA, Java RMI ... to make the application development easier.

Another link:

http://www.cs.cf.ac.uk/Dave/C/node33.html

Consider to assign points!
;-)

Re: networking

Indrajit Bhagat — Tue, 28 Aug 2007 10:11:47 GMT

thanks for replying it, but still i am not getting it.
what is role of rpc in nfs.
what is role or portmap.

Re: networking

Torsten. — Tue, 28 Aug 2007 10:31:31 GMT

I try to make it very simple:
NFS is using RPC for communication between server and clients, RPC is using the portmapper as a part of RPC.