论坛徽章: 0
10 可用积分
先介绍一下大概情况:
阵列是emc的cx-310,全光纤盘,与主机连接用的是4g的光纤通道卡,做的raid5
机器是IBM System x3650(7979B9C)
http://detail.zol.com.cn/135/134602/param.shtml
服务器的硬盘是SAS盘
操作系统是centos5.2,文件系统是ext3
[root@shisl2 ~]# uname -a
Linux shisl2 2.6.18-92.1.18.el5 #1 SMP Wed Nov 12 09:19:49 EST 2008 x86_64 x86_64 x86_64 GNU/Linux
[root@shisl2 ~]# more /etc/redhat-release
CentOS release 5.2 (Final)
下边是用dd测出来的速度(偶尔会更低):
sda是本机sas盘
sda
写
dd if = / dev/ zero of= / app1/ test/ dd. log
# dd if=/dev/zero of=/app1/test/dd.log
1975913+ 0 records in
1975912+ 0 records out
1011666944 bytes ( 1. 0 GB) copied, 15. 0658 seconds, 67. 1 MB/ s
读
dd if = / app1/ test/ dd. log of= / dev/ null
# dd if=/app1/test/dd.log of=/dev/null
1975912+ 0 records in
1975912+ 0 records out
1011666944 bytes ( 1. 0 GB) copied, 6. 53719 seconds, 155 MB/ s
读写
dd if = / app1/ test/ dd. log of= / app1/ test/ dd2. log
# dd if=/app1/test/dd.log of=/app1/test/dd2.log
1975912+ 0 records in
1975912+ 0 records out
1011666944 bytes ( 1. 0 GB) copied, 17. 1978 seconds, 58. 8 MB/ s
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
阵列
/ home/ sakai/ mount/ bak
写
dd if = / dev/ zero of= / home/ sakai/ mount/ bak/ dd. log
# dd if=/dev/zero of=/home/sakai/mount/bak/dd.log
3544417+ 0 records in
3544417+ 0 records out
1814741504 bytes ( 1. 8 GB) copied, 24. 3567 seconds, 74. 5 MB/ s
读
dd if = / home/ sakai/ mount/ bak/ dd. log of= / dev/ null
# dd if=/home/sakai/mount/bak/dd.log of=/dev/null
3544417+ 0 records in
3544417+ 0 records out
1814741504 bytes ( 1. 8 GB) copied, 11. 9376 seconds, 152 MB/ s
读写
dd if = / home/ sakai/ mount/ bak/ dd. log of= / home/ sakai/ mount/ bak/ dd2. log
# dd if=/home/sakai/mount/bak/dd.log of=/home/sakai/mount/bak/dd2.log
3544417+ 0 records in
3544417+ 0 records out
1814741504 bytes ( 1. 8 GB) copied, 26. 4129 seconds, 68. 7 MB/ s
我来回答