Re: raid5 slow (test on another system)
From: Stephan van Hienen <hidden>
Date: 2004-12-01 22:21:21
and another system
P4 2.4Ghz with 8*120gb on 3ware 7805
pci32 so the 2.4 looks like limited by the pci bus :
(2.6.8 8d r5 ext3)
Version 1.93c ------Sequential Output------ --Sequential Input-
--Random-
Concurrency 1 -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
storage 1G 507 98 64149 20 33240 11 984 97 95124 18
663.0 2
Latency 105ms 1039ms 879ms 29443us 63097us
870ms
Version 1.93c ------Sequential Create------ --------Random
Create--------
storage -Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 1849 64 +++++ +++ 10044 9 1570 54 +++++ +++
4406 49
Latency 64064us 184us 188us 133ms 102us
293us
1.93c,1.93c,storage,1,1101940252,1G,,507,98,64149,20,33240,11,984,97,95124,18,663.0,2,16,,,,,1849,64,+++++,+++,10044,9,1570,54,+++++,+++,4406,49,105ms,1039ms,879ms,29443us,63097us,870ms,64064us,184us,188us,133ms,102us,293us
(2.4.28 8d r5 ext3)
Version 1.93c ------Sequential Output------ --Sequential Input-
--Random-
Concurrency 1 -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
storage 1G 98 99 64449 44 42805 21 742 98 113930 29
732.5 4
Latency 129ms 809ms 819ms 23221us 139ms
754ms
Version 1.93c ------Sequential Create------ --------Random
Create--------
storage -Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 1526 61 +++++ +++ 8337 20 1940 78 +++++ +++
2441 36
Latency 175ms 39us 83us 78763us 20us
77558us
1.93c,1.93c,storage,1,1101940608,1G,,98,99,64449,44,42805,21,742,98,113930,29,732.5,4,16,,,,,1526,61,+++++,+++,8337,20,1940,78,+++++,+++,2441,36,129ms,809ms,819ms,23221us,139ms,754ms,175ms,39us,83us,78763us,20us,77558us