Date: Fri, 1 Jun 2007 13:03:11 +0200 From: "Claus Guttesen" <kometen@gmail.com> To: hshh <hunreal@gmail.com> Cc: freebsd-performance@freebsd.org Subject: Re: Bad performance while transfer large block size through NFS. Message-ID: <b41c75520706010403x8b57f1ao39aacbcbfa4ff4b5@mail.gmail.com> In-Reply-To: <9b6b59500706010310h145a1804ie97e57aa0c5e90a4@mail.gmail.com> References: <9b6b59500706010310h145a1804ie97e57aa0c5e90a4@mail.gmail.com>
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> I set up one NFS server, and mounted on other server by TCP. Servers > connected with Giga network, and running 6.2-RELEASE. > > But I found the performance is very bad while transfering large block size data. > For example, I use dd on NFS client to test the speed. > And ``systat -vm 1'' is displayed HDD is most busy, > Disks da0 > KB/t 16.00 > tps 239 > MB/s 3.73 > % busy 91 > > Can I do some tuning to improve large block size transfer over NFS? Try adding read- and write-size 32768, partial /etc/fstab: rw,intr,nfsv3,-a=4,-w=32768,-r=32768 or adding -r 32768 -w 32768 while mounting from command line. -- regards Claus When lenity and cruelty play for a kingdom, the gentlest gamester is the soonest winner. Shakespeare
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