Date: Sat, 28 Feb 2009 08:20:04 GMT From: Martin Birgmeier <martin@email.aon.at> To: freebsd-fs@FreeBSD.org Subject: Re: kern/131360: [nfs] poor scaling behavior of the NFS server under load Message-ID: <200902280820.n1S8K4xm061486@freefall.freebsd.org>
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The following reply was made to PR kern/131360; it has been noted by GNATS. From: Martin Birgmeier <martin@email.aon.at> To: bug-followup@FreeBSD.org Cc: Subject: Re: kern/131360: [nfs] poor scaling behavior of the NFS server under load Date: Sat, 28 Feb 2009 09:16:44 +0100 (CET) To add to what Peter Keel is writing: My kernels *did* still use the 4BSD scheduler, so I am quite sure that Peter will not see an improvement when switching to it from the ULE scheduler. Next observation: My server, aside from serving NFS, is also serving samba clients. Yesterday, from a single Windows 98 host, a directory on the server containing approx. 100 files was deleted. During this time, the server was completely unresponsive (except that I could still ping it). It was not even possible to contact the DNS server running on it. After a few minutes (and presumably when the Windows 98 host was finished deleting the directory, I did not watch this directly), things returned to normal. However, the "xload" display from the server then refreshed again and indicated a truly gigantic load peak - it must have been greater than 50 as the background of the xload window was completely filled with y axis lines (the horizontal lines dividing load levels). Something has been messed up horribly with multiprocessing on 7.1.
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