Date: Mon, 23 Jul 2001 14:11:41 -0700 From: David Greenman <dg@root.com> To: "Brad L. Chisholm" <blc@bsdwins.com> Cc: freebsd-questions@freebsd.org Subject: Re: Inconsistent NFS write performance Message-ID: <20010723141141.A14981@nexus.root.com> In-Reply-To: <20010723170325.A29362@bsdone.bsdwins.com>; from blc@bsdwins.com on Mon, Jul 23, 2001 at 05:03:25PM -0400 References: <20010723170325.A29362@bsdone.bsdwins.com>
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>Hi, > >I have two systems with different hardware, but nearly identical FreeBSD >setups. One of the systems is experiencing extremely poor NFS write >performance, although other network and filesystem performance (FTP and >RCP of large files, bonnie tests, etc) is similar to the other system. > >I cannot find the source of the poor NFS write performance for this system, >and it's frustrating because this is the system we want to put in place >as an NFS fileserver. > >Does anyone have suggestions? > >Here are some details: > > - Both systems are running the same snap of 4.3-STABLE, and are > using the same kernel (copied to both systems). > > - Both systems are plugged into the same switch, and are mounted on the > same client which is also plugged in to the same switch. > > - System 1 (the bad one), is a Dell PowerEdge 2550, dual processor 933Mz P3 > with 512Mb memory and an Ultra 160 SCSI drive, Intel 10/100 (fxp) ethernet > adapter [Not running an SMP kernel] ... >Please let me know if you have any ideas. This one has me baffled. A guess: WCE is disabled on the disk drive. Try doing a: camcontrol modepage da0 -m 8 ...and check that WCE is 1. -DG David Greenman Co-founder, The FreeBSD Project - http://www.freebsd.org President, TeraSolutions, Inc. - http://www.terasolutions.com Pave the road of life with opportunities. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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