关于盛大云的硬盘速度

有篇帖子说盛大云的硬盘很慢
tid=44603&fpage=2


我试了一下，性能还可以
我的机器是那个微型的。



[root@SNDA-zzzzzzzzzzzz ~]# hdparm -tT /dev/sda2


/dev/sda2:
Timing cached reads:   10364 MB in  2.00 seconds = 5188.28 MB/sec
Timing buffered disk reads:  308 MB in  3.02 seconds = 102.11 MB/sec




[root@SNDA-zzzzzzzzzzzz ~]# time dd if=/dev/zero of=testw1.dsk bs=8k count=100000
100000+0 records in
100000+0 records out
819200000 bytes (819 MB) copied, 4.16342 seconds, 197 MB/s


real    0m5.500s
user    0m0.024s
sys     0m1.072s
[root@SNDA-zzzzzzzzzzzz ~]# time dd if=/dev/zero of=testw1.dsk bs=80k count=10000
10000+0 records in
10000+0 records out
819200000 bytes (819 MB) copied, 5.02833 seconds, 163 MB/s


real    0m5.721s
user    0m0.000s
sys     0m1.604s


[root@SNDA-zzzzzzzzzzzz ~]# time dd if=/dev/zero of=testw1.dsk bs=800k count=1000
1000+0 records in
1000+0 records out
819200000 bytes (819 MB) copied, 4.53519 seconds, 181 MB/s


real    0m5.197s
user    0m0.000s
sys     0m1.420s




[root@SNDA-zzzzzzzzzzzz ~]# time dd if=/dev/sda2 of=/dev/null bs=8k
917504+0 records in
917504+0 records out
7516192768 bytes (7.5 GB) copied, 81.6636 seconds, 92.0 MB/s


real    1m21.765s
user    0m0.048s
sys     0m0.712s


[root@SNDA-zzzzzzzzzzzz ~]# time dd if=testw1.dsk of=testw2.dsk bs=8k
100000+0 records in
100000+0 records out
819200000 bytes (819 MB) copied, 19.7475 seconds, 41.5 MB/s


real    0m19.793s
user    0m0.012s
sys     0m0.604s