lkml.org 
[lkml]   [2001]   [Jun]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectPerformance Bottleneck 2.4.4+root-reiserfs?? - AAcRaid-Reiserfs??.
Hi All.

AS I type I am running a simple:
cat /proc/loadavg ; time dd if=/dev/zero of=test.fil bs=32768; cat
/proc/loadavg
on a HP Netserver 2000 with 2xPiii + 1gig ram + 100gig Raid5 (85gig).
I am running suse7.0 with kernerl 2.4.4 patched for AACraid Device

I have the privelage of having two such identical servers. The only
difference is the one that just peaked with a 14 load average and is
transfering +- 1.5mb/s(xovsiew) has its' root filesystem as reiserfs and
the other uses ext2.
The raid arrays are both however reiserfs and the same size with the same
hard drives. Except on the ext2 fs root the performance to write 2gigs
is
:real 0m49.766s
user 0m0.270s
sys 0m27.750s
1.22 1.43 1.49 1/49 7038

While on the reiserfs root it is still busy after a number of minutes.

Does read /dev/zero in a reiserfs fs slow things down SO much or is it a
Hardware/Driver fault??? What is going on ??

The reiserfs root just finished with:
real 12m30.025s
user 0m0.190s
sys 2m41.240s
5.79 7.66 4.78 1/96 29911

or 15 times slower on Identical hardware.... is this a BUG/feature of
reiserfs root....

Thanks for any and all replies
marCin



-------------------------------------
# Marcin Kowalski #
On_Linux Developer.
->Datrix Solutions.<-

Tel. 770-6146
# Cel. 082-400-7603 #
-------------------------------------

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:54    [W:0.028 / U:0.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site