Date: Tue, 21 Jun 2011 11:32:29 -0400 (EDT) From: "Viren R. Shah" <vshah@raytheonvtc.com> To: <freebsd-questions@freebsd.org> Subject: Pointers to debugging slow iSCSI initiator performance Message-ID: <1e6c601cc3028$6c33c920$449b5b60$@com>
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Folks I have a FreeBSD 8.1-STABLE system that I'm connecting via iSCSI to a Compellent SAN. The iscsi-initiator works fine but is very slow and given to periodic (very short) hangs. The issue is that we have subversion on it and it takes a long time to checkout some of our repos. Any pointers to tweaking the config or figuring out the cause of the slowness is appreciated. I haven't found many posts about the iscsi-initiator on FreeBSD in my searches. The config is below: arachnophile# dd if=/dev/zero of=/san/test.out bs=1M count=2048 2048+0 records in 2048+0 records out 2147483648 bytes transferred in 145.111894 secs (14798812 bytes/sec) arachnophile# uname -a FreeBSD arachnophile.virtc.com 8.1-STABLE FreeBSD 8.1-STABLE #0: Wed Oct 13 13:52:31 EDT 2010 root@arachnophile.virtc.com:/usr/obj/usr/src/sys/ARACHNOPHILE amd64 arachnophile# more /etc/iscsi.conf compellent { initiatorname = arach TargetName = iqn.2002-03.com.compellent:50000d3100067001 TargetAddress = 172.30.0.10:3260,0 } Hardware (in case it matters) is an IBM xSeries 346 CPU: Intel(R) Xeon(TM) CPU 3.40GHz (3400.16-MHz K8-class CPU) real memory = 2147483648 (2048 MB) arachnophile# netstat -I bge1 Name Mtu Network Address Ipkts Ierrs Idrop Opkts Oerrs Coll bge1 1500 <Link#2> 00:14:5e:2b:39:7d 353438253 0 0 438355075 0 0 bge1 1500 172.30.0.0 172.30.0.66 353316523 - - 438348928 - - Thanks Viren Shah vshah@raytheonvtc.com
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