From owner-freebsd-bugs Thu Jan 17 14: 0: 6 2002 Delivered-To: freebsd-bugs@hub.freebsd.org Received: from freefall.freebsd.org (freefall.FreeBSD.org [216.136.204.21]) by hub.freebsd.org (Postfix) with ESMTP id 4E9A137B417 for ; Thu, 17 Jan 2002 14:00:03 -0800 (PST) Received: (from gnats@localhost) by freefall.freebsd.org (8.11.6/8.11.6) id g0HM03793090; Thu, 17 Jan 2002 14:00:03 -0800 (PST) (envelope-from gnats) Date: Thu, 17 Jan 2002 14:00:03 -0800 (PST) Message-Id: <200201172200.g0HM03793090@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org Cc: From: Ryan Dooley Subject: Re: bin/33941: /usr/sbin/dev_mkdb dumps core Reply-To: Ryan Dooley Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org The following reply was made to PR bin/33941; it has been noted by GNATS. From: Ryan Dooley To: Matthew Dillon Cc: Sheldon Hearn , Subject: Re: bin/33941: /usr/sbin/dev_mkdb dumps core Date: Thu, 17 Jan 2002 15:51:31 -0600 (CST) > That should be fine. *whew* :-) > This would depend on the NFS block size, which is independant of the > filesystem block size. Even a standard NFS block size of 8K requires > 7 IP fragments to construct a packet (with a standard ethernet's MTU). > A larger NFS block size would result in even more fragments and > potentially overload the client's packet buffers. Right, we saw this with 32k packet sizes and we just left the default 8k. > It is usually possible to mitigate NFS 'packet storm' issues by using > TCP NFS mounts rather then UDP. For our IRIX and AIX clients that nfsv3/tcp works just fine. With Linux however, the only thing we've got is nfsv3/udp.... That darn linux :-) Thanks for getting back with me on this. Cheers, Ryan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message