Subject: Re: NFS problem.
To: Steven M. Bellovin <email@example.com>
From: Johnny Billquist <firstname.lastname@example.org>
Date: 12/10/2005 18:44:29
Steven M. Bellovin wrote:
> In message <email@example.com>, Michael van Elst writes:
>>firstname.lastname@example.org (Matthias Scheler) writes:
>>>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.
>>On the other hand, TCP isn't exactly fast with 5% packet loss either.
> Right, but TCP adapts its sending rate to the level that avoids packet
Exactly how does it do that in this instance?
We're talking about the fact that if we send back to back packet on the
net, we have a limit of (in this case I believe) 2 packets. All other
situations will work fine.
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: email@example.com || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol