Xref: utzoo comp.arch:10349 comp.unix.xenix:6427 Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!oliveb!sun!limes From: limes@sun.com (Greg Limes) Newsgroups: comp.arch,comp.unix.i386,comp.unix.xenix Subject: Re: Simple disk benchmark results Message-ID: Date: 22 Jun 89 23:29:21 GMT References: <9468@b-tech.ann-arbor.mi.us> Sender: news@sun.Eng.Sun.COM Organization: Sun Microsystems, Inc. Lines: 50 In-reply-to: zeeff@b-tech.ann-arbor.mi.us's message of 20 Jun 89 13:11:14 GMT In article <9468@b-tech.ann-arbor.mi.us> zeeff@b-tech.ann-arbor.mi.us (Jon Zeeff) writes: Test results from*: /bin/time dd if=/dev/disk_block_device of=/dev/null bs=4k count=2000 Sys Opsys Drive Inter Systime KBytes/sec .... Sun SunOS Sync 5.1 516* 3/80 SCSI Sun SunOS " 4.2 550 Spark/1 Sun SunOS " 2 521 4/110 DEC Ultrix SCSI 150 3100 Gee, any reason you put the Dec3100 down below the Sun stuff? I guess that the async SCSI hits their performance pretty bad. Does it support Sync SCSI at all? (I would not mind seeing performance info on this) Anyway, here are a couple more numbers ... I unmounted a couple of partitions that I have not yet loaded with data, and ran the test on them. The system is running unmodified "SunOS 4.0.3 EXPORT" with tuned file systems ("tunefs -a 32767 -d 0"); I quadrupled the transfer size as recommended in the earlier article ... even so, we really only get a little over one digit of precision. Sun SunOS sd4c Sync 3.3 1300 (block) SPARC/330 rsd4c SCSI 2.0 700 (char) Sun SunOS xd0h SMD 2.9 1700 (block) SPARC/370 rxd0h 2.0 900 (char) Sun SunOS id001c IPI 2.7 1900 (block) SPARC/390 rid001c 2.2 1200 (char) (Minor Nits: its "Sun", not "SUN"; "SunOS", not "SUN OS"; and "SPARC", not "Spark"; not that I particularly care, but the information may be of interest. Makes you seem more authoratative when you get the names right.) -- Greg Limes [limes@sun] A Happy Engineer with a SPARCstation 370 under his desk :-) -- Greg Limes limes@sun.com ...!sun!limes 73327,2473 [chose one]