Subject: Re: NFS problem.
To: None <current-users@NetBSD.org>
From: Matthias Scheler <firstname.lastname@example.org>
Date: 12/09/2005 23:47:54
On Sat, Dec 10, 2005 at 12:24:41AM +0100, Johnny Billquist wrote:
> Wasn't there a problem in the past with large UDP packets and NFS?
Yes, but it hasn't changed and never will. Large UDP packets are sent
as IP fragments. If you lose one of the IP fragments the whole UDP
packet is lost because there is no selective retransmit. When a machine
e.g. loses 5% of incoming packets at least one of the IP fragments
of a 32KB UDP packet will always get lost. Retries will not help because
another single lost packet will prevent the reception of the UDP packet.
Matthias Scheler http://scheler.de/~matthias/