Date: Thu, 10 Oct 2002 11:44:11 +0200 (CEST) From: "Hartmann, O." <ohartman@klima.physik.uni-mainz.de> To: freebsd-questions@freebsd.org Cc: freebsd-stable@freebsd.org Subject: NFS server not respnding! Message-ID: <20021010111438.O49715-100000@klima.physik.uni-mainz.de>
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Dear Sirs. Using FreeBSD 4.6.2-pl2 and FreeBSD 4.7-RC2 on our server system (one 4.7-RC experimental system) and utilizing AMD for mounting home space and other services via TCP protocol results in nfs server 134.93.180.216:/usr/homes: not responding nfs server 134.93.180.216:/usr/homes: is alive again very often, when load of the appropriate client is very high. That happens when on our number crunching systems utilization of CPU time is high or many users try copy from and to via SAMBA to the main NFS server system. This happens under heavy load and, when only a few users are on the systems, but it happens very often while - copying big files/datas from PC systems via SAMBA - whenever a number crunching job runs on a different server and on another server a job for copying data has been started, the influences to a completely different system, in this case the main NFS server, is significant. FreeBSD offers a lot of kernel stuff tunig the system's performance, especially for NFS etc (also sysctl changeable kernel varibales). Can anyone help with tuned parameters or give hints how to investigate problems? What's about the fact running AMD/NFS over TCP instead of UDP? UDP seems to give the benefit of speed, while TCP seems to be more reliable and secure from the point of view from the network. Thanks in advance for responding to this foolish questions ... Oliver -- MfG O. Hartmann ohartman@klima.physik.uni-mainz.de ------------------------------------------------------------------ IT-Administration des Institutes fuer Physik der Atmosphaere (IPA) ------------------------------------------------------------------ Johannes Gutenberg Universitaet Mainz Becherweg 21 55099 Mainz Tel: +496131/3924662 (Maschinenraum) Tel: +496131/3924144 (Buero) FAX: +496131/3923532 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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