Date: Tue, 27 Aug 2002 22:24:59 -0400 From: "David E. Cross" <crossd@cs.rpi.edu> To: freebsd-hackers@freebsd.org Subject: (hopefully) easy NFS question Message-ID: <200208280224.g7S2OxO36242@monica.cs.rpi.edu>
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I have an NFS server that recently began to display the following behaviour (technically the brhaviour is displayed on the clients): (4.6.2-RELEASE) mount_nfs -3 -T server:/path /mnt (UDP doesn't exhibit this) dd bs=64k if=/dev/zero of=/mnt/somefile I now get about 7 times/second on the client: NFS server server:/path is not responding, still trying NFS server server:/path is OK. NFS server is a Dual P2/400, 512MB ECC cache, exact details can be found in my microuptime() posts last month (which have been solved with a new powersupply) They aren't included here for the sake of brevity, and I hope they don't matter. A tcpdump on the client shows seemingly normal request/reponses from the server and _lots_ of NFS Null requests from client-->server. I am guessing this is the client trying to see if the server is back? This is on the order of many times a second: 21:31:09.275806 client.0 > server.nfs: 1448 null (DF) 21:31:09.275900 server.nfsd > client.1015: . ack 91673 win 30280 <nop,nop,timestamp 15510694 88743> (DF) 21:31:09.275993 client.0 > server.nfs: 1448 null (DF) 21:31:09.276008 client.0 > server.nfs: 1448 null (DF) 21:31:09.276025 client.0 > server.nfs: 1448 null (DF) 21:31:09.276137 server.nfsd > client.1015: . ack 94569 win 27384 <nop,nop,timestamp 15510694 88743> (DF) 21:31:09.276409 server.nfs > client.1710096066: reply ok 164 (DF) 21:31:09.276451 client.0 > server.nfs: 1448 null (DF) 21:31:09.276466 client.0 > server.nfs: 1448 null (DF) Ethernet card in question is a 3c950C in the server and a FXP 100B in the client (client is also 4.6.2). I tested another machine with a 3c950C and the same client with no errors. I would say hardware but this is too predictable with no dataloss, and this is seemingly initiated on the client. Any ideas on where to look? -- David Cross | email: crossd@cs.rpi.edu Lab Director | Rm: 308 Lally Hall Rensselaer Polytechnic Institute, | Ph: 518.276.2860 Department of Computer Science | Fax: 518.276.4033 I speak only for myself. | WinNT:Linux::Linux:FreeBSD To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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