Date: Fri, 24 Apr 2009 20:18:13 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-questions@freebsd.org Subject: Re: NFS slow Message-ID: <gssvpm$lkd$1@ger.gmane.org> In-Reply-To: <26653.1927897178$1240593938@news.gmane.org> References: <26653.1927897178$1240593938@news.gmane.org>
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[-- Attachment #1 --] Jan Catrysse wrote: > Hello all, > > I am having some problems with NFS and slow performance. > This is the scenario: > > 2x FreeBSD 7.1. (Raid storage server, MP, the works) > > GB Lan interface between them. > > When I transfer 1 big file the speed is never higher than 10MB/s with a peak > to 14MB/s. > > When I transfer multiple files at the same time speed is about 10MB/s per > thread. > Disk speed > 100MB/s > > Network speed using samba > 60MB/s (limited by clients disk speed) > > Tried enabling NFSlockd, NFSstatd but that changes nothing. > > Any help or hunch would be greatly appreciated. Here are some ideas for testing: * Any firewall in between them? Do you have network errors? * Any other network problems, like DNS lookup failures? (not that it should matter for sustained tranfers but still...) * Are you using TCP or UDP for NFS? TCP should be better in all cases. * Have you monitored the system with "top"? Try hitting "S" and "H" in top while transfering files, see if anything looks suspicious. * Run "iostat 1", check tps and KB/t. * What file system are you using? [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAknyAmUACgkQldnAQVacBciVbwCg/O5ypPsgbgS4/h5mmdGCAmPv FAEAnieMj2iuxEBAbwmgI5bWyDkUbdpo =TM+6 -----END PGP SIGNATURE-----
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