Date: Sun, 4 Aug 2002 00:56:01 -0400 (EDT) From: Daniel Eischen <eischen@pcnet1.pcnet.com> To: hackers@freebsd.org Cc: kbayer@ligo.mit.edu Subject: Re: raid disks in FreeBSD (fwd) Message-ID: <Pine.GSO.4.10.10208040050030.21139-100000@pcnet1.pcnet.com>
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Anyone know how to best tune a system for RAID performance?
Keith, what kind of RAID controller is it?
[ Keith, yes, my email address is still the same, even though it
looks like I come from elsewhere at times. ]
---------- Forwarded message ----------
Date: Sat, 3 Aug 2002 17:32:07 -0400
From: Keith Bayer <kbayer@ligo.mit.edu>
To: Daniel Eischen <eischen@pcnet1.pcnet.com>
Subject: Re: raid disks in FreeBSD
Thanks. I went ahead and did it. FreeBSD stacks up pretty
well against RedHat 7.3 (using bonnie++ and raw dd) except
for sequential block input where it gets beaten 170MB/s to
70MB/s. I'm using soft updates but haven't tuned the fs
beyond that. Might you have any suggestions on how I could
tweak the filesystem to get better sequential input in
block mode?
Just ignore me if you're busy - I'm really just playing
around here. Even if FreeBSD's numbers are better, I
seriously doubt that I could get the project to switch over
anyway.
Just noticed - did you change your email address from vigrid?
thanks,
Keith
--
bonnie++ on RedHat7.3:
----------------------
Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ldaspc1 4G 19609 89 25024 19 12918 7 24581 98 170855 40 444.4 1
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 2222 96 +++++ +++ +++++ +++ 2315 98 +++++ +++ 5867 98
bonnie++ on FreeBSD 4.6 Stable:
-------------------------------
Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ldaspc1.mit.edu 4G 31232 37 35220 17 17349 11 57123 73 76943 22 462.3 1
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 29511 64 +++++ +++ +++++ +++ 31783 69 +++++ +++ +++++ +++
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