-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 You need to configure jumbo frames, you need to tweak tcp buffers in the kernel among other things, and with software iscsi initiators you're really at the mercy of the coders. Lots of NICs these days for servers come with hardware iscsi initiators which would perform better most likely given the state of software initiators.
On 11/17/2010 11:10 AM, Jonathan B Bayer wrote: > Hello LOPSA, > > We have a set of systems which are accessing a back-end storage system > via NFS. We've been having some performance issues, so I've been > investigating iSCSI. > > I've set up a FreeNAS server for testing. FreeNAS is BSD based, and > runs both NFS and iSCSI. > > On the FreeNAS server I set up a ZFS filesystem. I then exported the > filesystem via NFS, and also set up an iSCSI volume on it. > > This system and the test client are both on a gigabit network, with > two switches between them. > > I mounted the NFS volume on the client system (Ubuntu 9.10 system), > and also mounted the iSCSI volume on the same system. > > I then did a simple test, copying a 4.3 gig ISO to each volume. I did > this two times, and timed the second copy; this way the overhead of > allocating space was eliminated. > > The results puzzled me: > > NFS: 5:08 > iSCSI: 5:54 > > I was expecting the iSCSI to be faster, but this seems to indicate > that it is slower. > > What am I missing? > > > Thanks > > > JBB - -- Joe McDonagh AIM: YoosingYoonickz IRC: joe-mac on freenode L'ennui est contre-révolutionnaire -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQIcBAEBAgAGBQJM5AWZAAoJEFKvc4++22tcpxIQALZlz9LtCNVs5xA8KY5qIXWa hy+JTmvnsfNk776Nc7fD7hCgzvSsoGYu9mhmFRLCOFbkMUDh2aLAljmAd3011+uQ Q7rl7TikYuIawwUZxMx+0knbPJYkmPb1N3du1W15hFBwRb/mzVspnyPiRQ5qYg9G KUyIbIrPdkBJ1DZtuhk3gDk5B36DuWdke4dsPBoSBcbB/vOd10D5cFjgtw6rxh2q EfdtLUneWluZNCwBJzqETHSD1IMu7Qr4ZCiL8LrlxROcIuZaDN27uStVBfl+DeFu IwwO4nMatd6OyVWevQWf/6M1nDvJ8A/ttl0jbw+lB/gzO7uE8gZDK39bFOos+Y9w kYM7EMawwgk6j9wnhkzkCXVOULpfvOQEn2dri/XgwMB71bzujTdDBzgjjpBfLI3B Q3es6kZb0hwSXnkB4wlqfGaFbjGtXGSte6hs7NejeEOydUEGyoU+AYE6sx8Uarty ECA46lzSXhfhSFtkDNBnbqwpJM1oKx7prGD/Kr18++NuQwgbGXlp1KJrH979vJfz x0mlmeJwOAhQbgE64FaazfzLmN2UporwV3KUoQbPDc4MzaYeaE61fGcQWsjKfM5/ dX60L5X29woftpFnJd/Lh7+mbgIdrlOY+zDQLFdmmichhDF+hsFz8hSxNjQZbM5N 1mL9COzoC8NibHQzuAit =iXgc -----END PGP SIGNATURE----- _______________________________________________ Discuss mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
