Date: Tue, 06 Jan 2009 15:49:32 +0200 From: Danny Braniss <danny@cs.huji.ac.il> To: Sossi Andrej <asossi@dotcom.ts.it> Cc: freebsd-scsi@freebsd.org Subject: Re: ISCSI slow to read from DELL MD3000i Message-ID: <E1LKCJI-000Crk-2p@kabab.cs.huji.ac.il> In-Reply-To: <496239E8.4020607@dotcom.ts.it> References: <496239E8.4020607@dotcom.ts.it>
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sorry for the top potst, my MUI screws up the quoatet message. check: ftp://ftp.cs.huji.ac.il/users/danny/freebsd/iscsi-2.1.tar.gz danny > Hello,> I manage an web/mail/DB server. We recently purchased a DELL M= D3000i > server with ISCSI interface. I tested the MD3000i with FreeBSD >= 7.0-RELEASE, i recompiled the kernel myself but the ISCSI communication= > results slow.> Below configuration:> > net configuration:> MD3000i = > = FreeBSD 7.0> controller 0 interface 0: 192.168.253.2= 54 =7C__=7C switch 1GB > =7C__=7Cnetcard 0: 192.168.253.1 (re0)=7C> c= ontroller 1 interface 0: 192.168.253.253 =7C =7C192.168.253.X =7C = =7C > =7C> = =7C > = =7C > = =7C> controller 0 interface 1: 192.168.252.254 =7C__=7C switch 1GB = > =7C__=7Cnetcard 1: 192.168.252.1 (re1)=7C> controller 1 interface 1:= 192.168.252.253 =7C =7C192.168.252.X =7C =7C > = =7C> > manage interface 0: 192.168.0.249 = =7C__=7C switch 10/100 MB =7C_.... > internal net> manage interf= ace 1: 192.168.0.248 =7C =7C192.168.0.X =3D=7C> >= /etc/iscsi.conf:> port 3260> nas_dotcom =7B> TargetAddress =3D 19= 2.168.253.254> TargetName =3D > iqn.1984-05.com.dell:powervaul= t.6001ec9000f192210000000048a44372> initiatorName =3D iqn.2005-01.= il.ac.huji.cs::web.dotcom.ts.it> =7D> > web=23 sysctl net.iscsi> net.iscs= i.driver_version: 2.1.0> net.iscsi.isid: =C2=80DIB00> net.iscsi.sessions:= 1> net.iscsi.0.targetname: > iqn.1984-05.com.dell:powervault.6001ec9000f= 192210000000048a44372> net.iscsi.0.targeaddress: 192.168.253.254> net.isc= si.0.stats: recv=3D71479 sent=3D71479 flags=3D0x0000019f pdus-allo=3Dc=3D= 0 > pdus-max=3D5 cws=3D385 cmd=3Db499 exp=3Db499 max=3Db619 stat=3Db49b i= tt=3D=3Db499> net.iscsi.0.douio: 0> net.iscsi.0.pid: 612> > web=23 sysctl= kern.cam> kern.cam.cam_srch_hi: 0> kern.cam.scsi_delay: 5000> kern.cam.c= d.changer.max_busy_seconds: 15> kern.cam.cd.changer.min_busy_seconds: 5> = kern.cam.da.da_send_ordered: 1> kern.cam.da.default_timeout: 60> kern.cam= .da.retry_count: 4> kern.cam.da.0.minimum_cmd_size: 6> kern.cam.da.1.mini= mum_cmd_size: 6> kern.cam.da.2.minimum_cmd_size: 6> kern.cam.da.3.minimum= _cmd_size: 6> > > I tryed with the ISCSI driver I found in FreeBSD 7.0, w= ith the same > driver patched with the patch I found there > (http://list= s.freebsd.org/pipermail/freebsd-scsi/2008-February/003383.htm=3Dl) > and = alse with the driver ISCSI 2.1 downloaded from Danny's ftp.> All test hav= e same results: about 820=7E850KB/s.> > eg:> web=23 dd if=3D/dev/zero of= =3D/usr/local/www/tmp count=3D1m> 1048576+0 records in> 1048576+0 records= out> 536870912 bytes transferred in 654.398700 secs (820403 bytes/sec)> = > and simultaneously> web=23 netstat -w 1 -I re0> input = (re0) output> packets errs bytes packets errs = bytes colls> 0 0 0 0 0 0= 0> 123 0 8550 234 0 343180 0> = 300 0 20952 564 0 824808 0> 325 = 0 22698 611 0 893542 0> 300 0 = 20952 564 0 824808 0> 325 0 22698 = 611 0 893542 0> 300 0 20952 564 = 0 824808 0> .... and more> re1 has no traffic.> > But at the en= d i try read from ISCSI. Read is more quickly.> eg:> web=23 dd if=3D/usr/= local/www/tmp of=3D/usr/tmp> 1048576+0 records in> 1048576+0 records out>= 536870912 bytes transferred in 19.636577 secs (27340351 bytes/sec)> > an= d simultaneously:> web=23 netstat -w 1 -I re0> input = (re0) output> packets errs bytes packets errs = bytes colls> 0 0 0 0 0 0 = 0> 2210 0 3296084 1156 0 78744 0> = 16420 0 24493888 8567 0 582558 0> 13031 = 0 19427130 6809 0 463074 0> 20638 0 30786= 236 10768 0 732288 0> 17296 0 25791540 = 9032 0 614160 0> 20347 0 30347462 10615 0= 721854 0> 20254 0 30210156 10567 0 71859= 0 0> .... and more> re1 has no traffic.> > I searched but found noth= ing that helps me, the only thing that > triggered my attention was this= Microsoft's User's Guide > (http://www.microsoft.com/downloads/details.a= spx?familyid=3D12CB3C1A-15D6=3D-4585-B385-BEFD1319F825&displaylang=3Den).= > > It seems interesting at least the chapter 'Addressing Slow Performan= ce > with iSCSI clusters'> > Thanks in advance for yours help.> > -- > So= ssi Andrej> -------------------------> DotCom Information technology> > V= ia Biancospino, 9> 34151 - Opicina (TS)> Italy> > tel: +39 040 2158191> f= ax: +39 040 0641954> E-mail: asossi=40dotcom.ts.it> ---------------------= -------> > Ai sensi del D.lgs n. 196 del 30.06.03 (Codice Privacy) si pre= cisa che le=3D informazioni contenute in questo messaggio sono riservate = e ad uso esclu=3Dsivo del destinatario. Qualora il messaggio in parola Le= fosse pervenuto =3Dper errore, La preghiamo di eliminarlo senza copiarlo= e di non inoltrarlo=3D a terzi, dandocene gentilmente comunicazione. Gra= zie> > This message, for the D.lgs n. 196 / 30.06.03 (Privacy Code), may = contain=3D confidential and/or privileged information. If you are not the= addressee=3D or authorized to receive this for the addressee, you must n= ot use, copy,=3D disclose or take any action based on this message or any= information her=3Dein. If you have received this message in error, pleas= e advise the sender=3D immediately by reply e-mail and delete this messag= e. Thank you for your =3Dcooperation.> > ________________________________= _______________> freebsd-scsi=40freebsd.org mailing list> http://lists.fr= eebsd.org/mailman/listinfo/freebsd-scsi> To unsubscribe, send any mail to= =22freebsd-scsi-unsubscribe=40freebsd.org=22>=20
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