Date: Thu, 17 Jan 2002 14:00:03 -0800 (PST) From: Ryan Dooley <dooleyr@missouri.edu> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/33941: /usr/sbin/dev_mkdb dumps core Message-ID: <200201172200.g0HM03793090@freefall.freebsd.org>
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The following reply was made to PR bin/33941; it has been noted by GNATS. From: Ryan Dooley <dooleyr@missouri.edu> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Sheldon Hearn <sheldonh@starjuice.net>, <bug-followup@FreeBSD.ORG> 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
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