From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Brian J. Murrell" Subject: slow performance -- how to diagnose Date: Wed, 19 Apr 2006 16:14:05 -0400 Message-ID: <1145477646.12854.152.camel@pc> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-w5hXIUOQYty4rFCPf6KU" Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1FWJ43-00022d-VH for nfs@lists.sourceforge.net; Wed, 19 Apr 2006 13:14:15 -0700 Received: from linux.interlinx.bc.ca ([66.11.173.224]) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1FWJ42-0001PD-7u for nfs@lists.sourceforge.net; Wed, 19 Apr 2006 13:14:15 -0700 Received: from pc.interlinx.bc.ca (pc.ilinx [10.75.22.1]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by linux.interlinx.bc.ca (Postfix) with ESMTP id 9E657D8D78 for ; Wed, 19 Apr 2006 16:14:06 -0400 (EDT) To: nfs@lists.sourceforge.net Sender: nfs-admin@lists.sourceforge.net Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: --=-w5hXIUOQYty4rFCPf6KU Content-Type: text/plain Content-Transfer-Encoding: quoted-printable I'm experiencing some slow performance that I have done some initial diagnosis as per http://nfs.sourceforge.net/nfs-howto/performance.html but not sure where to go from here. I have tried both UDP and TCP and in fact UDP performance seems to be slightly worse. The connection between a client and the server is gige and seems to perform pretty close to such using ttcp: ttcp-t: 819200000 bytes in 7.368 real seconds =3D 848.299 Mbit/sec +++ ttcp-t: 819200000 bytes in 7.01 real seconds =3D 891.19 Mbit/sec +++ The first is from client to server and the second server to client. Both seem reasonable. The speed of the disk on the server using a simple dd test: # time dd if=3D/dev/zero of=3Dfile bs=3D1M count=3D4000 4000+0 records in 4000+0 records out real 2m28.756s user 0m0.024s sys 0m17.141s (1024*1024*4000)/148.7/(1024*1024)*8 =3D=3D 26.899 MB/sec =3D=3D 215.192Mbi= t/s But from an NFS client... # rsh client5 "(cd $(pwd);time dd if=3D/dev/zero of=3Dfile bs=3D1M count=3D= 1000)" 1000+0 records in 1000+0 records out real 1m21.036s user 0m0.006s sys 0m1.982s (1024*1024*1000)/81.036/(1024*1024) =3D=3D 12.340 MB/sec Any ideas where to look? b. --=20 My other computer is your Microsoft Windows server. Brian J. Murrell --=-w5hXIUOQYty4rFCPf6KU Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQBERpoNl3EQlGLyuXARAneEAJwJ1+/lXB9Me6RzeGEyhpAEZGsSagCcDTGf nXVy6OF10gGsqCvb989nC/k= =9fyQ -----END PGP SIGNATURE----- --=-w5hXIUOQYty4rFCPf6KU-- ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs