Date: Wed, 01 Oct 2008 14:47:07 +1000 From: Andrew Snow <andrew@modulus.org> To: =?ISO-8859-1?Q?Johan_Str=F6m?= <johan@stromnet.se> Cc: freebsd-scsi@freebsd.org Subject: Re: state of iscsi_initiator? Message-ID: <48E300CB.8070808@modulus.org> In-Reply-To: <35FAB782-F576-4FB7-8633-67CFB63D9389@stromnet.se> References: <35FAB782-F576-4FB7-8633-67CFB63D9389@stromnet.se>
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I'm just playing with iSCSI now, on a fresh 7.1-STABLE machine connected to another FreeBSD box running ports/net/iscsi-target. I am using the latest version 2.1 Initiator from: ftp://ftp.cs.huji.ac.il/users/danny/freebsd/ It seems alot better now than when I last tried it. The speed is constant at around 50MB/s for a single sequential read or write. It also reconnected very quickly when I restarted the target. I was even able to reboot the target box and I/O resumed perfectly once it finished booting! The speed increased to 80mb/s when I ran two threads, which is close to the max performance for the network cards in this machine. A couple of minor issues: 1. Trouble shutting down iscontrol - after I kill -9 it stays around for a minute or more until it finally goes away. 2. Under very heavy multi-threaded load, the client machine gets sluggish to respond, even to keystrokes on the console. And if I shutdown the target, even local disk accesses on the client computer stop working after a while. (I don't think this is a problem with iSCSI initiator. I suspect there's something in FreeBSD which pauses all disk I/O if the length of outstanding requests is too high, can anyone shed some light on this?) Overall, a pleasant experience and shows how much good work has been done on iSCSI. Congratulations Danny :-) - Andrew
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