Re: NFS client defaults to a mix of UDP and TCP

From: Andriy Gapon <avg_at_icyb.net.ua> Date: Mon, 14 Sep 2009 16:28:51 +0300 · This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:39:55 UTC

on 14/09/2009 15:58 John Baldwin said the following:
> 
> Yes.  I know of folks would love to have NFS use only TCP, including the 
> initial RPC portmapper requests.  IMO an NFS mount should use TCP for 
> everything and a UDP mount should use UDP for everything by default.
> 

And another fact - it seems that NFS umount unconditionally uses UDP for "something":

/*
 * Report to mountd-server which nfsname
 * has been unmounted.
 */
if (ai != NULL && !(fflag & MNT_FORCE) && do_rpc) {
        clp = clnt_create(hostp, MOUNTPROG, MOUNTVERS, "udp");
...

-- 
Andriy Gapon