Le 27 mai 2010 à 07:03, Brent Jones a écrit : > On Wed, May 26, 2010 at 5:08 AM, Matt Connolly > <matt.connolly...@gmail.com> wrote: >> I've set up an iScsi volume on OpenSolaris (snv_134) with these commands: >> >> sh-4.0# zfs create rpool/iscsi >> sh-4.0# zfs set shareiscsi=on rpool/iscsi >> sh-4.0# zfs create -s -V 10g rpool/iscsi/test >> >> The underlying zpool is a mirror of two SATA drives. I'm connecting from a >> Mac client with global SAN initiator software, connected via Gigabit LAN. It >> connects fine, and I've initialiased a mac format volume on that iScsi >> volume. >> >> Performance, however, is terribly slow, about 10 times slower than an SMB >> share on the same pool. I expected it would be very similar, if not faster >> than SMB. >> >> Here's my test results copying 3GB data: >> >> iScsi: 44m01s 1.185MB/s >> SMB share: 4m27 11.73MB/s >> >> Reading (the same 3GB) is also worse than SMB, but only by a factor of about >> 3: >> >> iScsi: 4m36 11.34MB/s >> SMB share: 1m45 29.81MB/s >>
<cleaning up some old mail> Not unexpected. Filesystems have readahead code to prefetch enough to cover the latency of the read request. iSCSI only responds to the request. Put a filesystem on top of iscsi and try again. For writes, iSCSI is synchronous and SMB is not. -r >> >> Is there something obvious I've missed here? >> -- >> This message posted from opensolaris.org >> _______________________________________________ >> zfs-discuss mailing list >> zfs-discuss@opensolaris.org >> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >> > > Try jumbo frames, and making sure flow control is enabled on your > iSCSI switches and all network cards > > -- > Brent Jones > br...@servuhome.net > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
