Re: I/O Confirmation/Problem under 2.6/2.4
From: Mark Watts
Date: Wed Jun 23 2004 - 13:29:49 EST
I get the following performance numbers from a Dell PowerEdge 1750 (2x Xeon)
with a Perc 4/Di (megaraid driver). 13x U320 10k 146GB disks configured in a
raid5 (in a PowerVault 220s external U320 enclosure).
Kernel is 2.6.3 (Mandrake 10.0)
# bonnie++ -u mwatts -d .
Using uid:500, gid:500.
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
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
ircd.eris.qineti 4G 28774 99 89047 93 54483 21 34335 89 115549 20 575.2
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 2192 99 +++++ +++ +++++ +++ 2197 99 +++++ +++ 5526
99
ircd.eris.qinetiq.com,4G,28774,99,89047,93,54483,21,34335,89,115549,20,575.2,1,16,2192,99,
+++++,+++,+++++,+++,2197,99,+++++,+++,5526,99
hdparm:
# hdparm -tT /dev/sdb
/dev/sdb:
Timing buffer-cache reads: 2812 MB in 2.00 seconds = 1404.11 MB/sec
Timing buffered disk reads: 294 MB in 3.00 seconds = 97.92 MB/sec
I've been advised that the megaraid2 driver can be faster, but I've yet to try
it.
Mark.
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