Date: Fri, 11 Jul 2008 14:52:07 +0200 From: Adrian Gschwend <ktk@netlabs.org> To: freebsd-scsi@freebsd.org Subject: iSCSI performance Message-ID: <g57kqh$imm$1@ger.gmane.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I finally invested some time to get iSCSI to work on FreeBSD. Now I do have an iSCSI disk mounted in the system so I started doing some performance tests against an NetApp FAS3020 head with an iSCSI LUN configured for my FreeBSD 7.0-stable box. It's a rather old IBM server and I used sysbench to get some stats. The results I got were: local SCSI disk, UFS: - -- Operations performed: 5999 Read, 4001 Write, 12800 Other = 22800 Total Read 93.734Mb Written 62.516Mb Total transferred 156.25Mb (2.2672Mb/sec) 145.10 Requests/sec executed - -- NFS share on the NetApp (no tweaking, default NFS mount): - -- Operations performed: 6006 Read, 3994 Write, 12800 Other = 22800 Total Read 93.844Mb Written 62.406Mb Total transferred 156.25Mb (11.948Mb/sec) 764.69 Requests/sec executed - -- iSCSI with UFS: - -- Operations performed: 6004 Read, 3996 Write, 12800 Other = 22800 Total Read 93.812Mb Written 62.438Mb Total transferred 156.25Mb (489.41Kb/sec) 30.59 Requests/sec executed - -- which is a rather bad results for iSCSI ;) Note that I didn't want to get the real performance so I just took the default sysbench lines I found in the docs. It was just to get something to compare to. Googling a bit I found this posting here: http://lists.freebsd.org/pipermail/freebsd-scsi/2008-February/003383.html Is this patch in -CURRENT by now or do I still have to compile the stuff on my own if I want to do some more tests? And is anyone actively working on iSCSI right now? I do have some proposals regarding iscontrol as well, the tool is not yet idiot proof ;) What would be the appropriate list to post feedback regarding that? next thing on my list is to try ZFS on the iSCSI share but I would like to see some better performance on UFS first :) BTW in case you wonder why I want to use iSCSI: I am running a subversion server with rather big repositories using "fsfs" on NFS and I run into very weird PROPFIND problems (Apache frontent) when importing large quantities of data and I don't have the problem doing the same on a local drive of the server. So I guess that's some NFS locking stuff I couldn't get rid of. The idea is to replace that with iSCSI and ZFS (I love NetApps snapshot feature and I want that too in the future, so ZFS) once both is declared as stable (yes, I have time :) cu Adrian -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFId1d3qpMUYrZbQBERAhjfAJ96YsvsVyLgeRY3Ah54UM1jvwHKwgCeIaoM ibhoi7c6jovvBIF/jaI5IQ8= =mr7E -----END PGP SIGNATURE-----
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