[3764] in linux-scsi channel archive
Disk performance
daemon@ATHENA.MIT.EDU (Bill Broadley)
Fri Apr 24 22:19:16 1998
From: Bill Broadley <bill@math.UCDavis.edu>
To: linux-scsi@vger.rutgers.edu
Date: Fri, 24 Apr 1998 18:20:27 -0700 (PDT)
I've seen alot of performance numbers posted, just wanted to point out
that while latency is directly related to RPM, bandwidth isn't. For
instance on a p6-200 with an 8.4 gb IBM eide driver (5400 rpm) I get:
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
512 5615 97.0 13395 14.9 4313 12.2 5119 81.3 9756 9.6 57.4 0.7
I've been pondering a more realistic/real world benchmark for disk
access to compare scsi vs eide under intensive loads. I'm open to
suggestion. In bandwidth things seem fairly equal.
--
Bill Broadley Bill@math.ucdavis.edu UCD Math Sys-Admin
Linux is great. http://math.ucdavis.edu/~bill PGP-ok
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