Subject: Re: NFS problem.
To: Matthias Scheler <firstname.lastname@example.org>
From: Johnny Billquist <email@example.com>
Date: 12/10/2005 00:56:03
Matthias Scheler wrote:
> 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.
The problem is that some hardware cannot send that many packets in a
burst like NFS does. So it will never succeed.
Ah, found it.
NFS_RSIZE, NFS_WSIZE and NFS_READDIRSIZE
you can set those options in your config file to change the size of
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