Date: Mon, 10 Apr 2006 18:55:03 +0200 From: Nicolas KOWALSKI <Nicolas.Kowalski@imag.fr> To: freebsd-fs@FreeBSD.org Subject: Re: [patch] giant-less quotas for UFS Message-ID: <vqolkudv09k.fsf@corbeau.imag.fr> In-Reply-To: <443A8842.6060802@centtech.com> References: <20060329152608.GB1375@deviant.kiev.zoral.com.ua> <vqoy7ydv7lw.fsf@corbeau.imag.fr> <20060410144904.GC1408@deviant.kiev.zoral.com.ua> <vqou091v3vt.fsf@corbeau.imag.fr> <443A7C8E.4020203@centtech.com> <vqopsjpv2ci.fsf@corbeau.imag.fr> <443A8842.6060802@centtech.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Eric Anderson <anderson@centtech.com> writes: > Nicolas KOWALSKI wrote: >> >> Yes, this is exactly what is happening. To add some precision, some >> students here use calculation applications >> that allocate a lot of disk space, ususally more than their allowed >> home quotas; when by error they launch these apps in their home >> directories, instead of their workstation dedicated space, it makes >> the server go to its knees on the NFS client side. > > When you say 'to it's knees' - what do you mean exactly? How many > clients do you have, how much memory is on the server, and how many > nfsd threads are you using? What kind of load average do you see > during this (on the server)? Sorry for the imprecision. The server is a Dual-Xeon 2.8Ghz, 2GB of RAM, using SCSI3 Ultra320 76GB disks and controller. It is accessed by NFS from ~100 Unix (Linux, Solaris) clients, and by Samba from ~15 Windows XP. The network connection is GB ethernet. During slowdowns, it's only from a NFS client view that the server does not respond. For example, a simple 'ls' in my home directory is almost immediate, but when it slows down, it can take up to 2 minutes. On the server, the load average goes to 0.5, compared to a default maximum of 0.15-0.20. The nfsd processus shows them in the state "biowr" in top, but nothing is really written, because the quotas system block any further writes to the user exceeding her/his quotas. -- Nicolas
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?vqolkudv09k.fsf>