买了个ssd硬盘,就想着跟普通的机械盘做个比较,因为桌面装的是ubuntu系统,所以就想用linux的命令简单测一下好了
下面是ssd的性能数据:
测试写:
xxx@WaitFish:~ > time dd if=/dev/zero bs=1024 count=1000000 of=1Gb.file 1000000+0 records in 1000000+0 records out 1024000000 bytes (1.0 GB) copied, 3.78724 s, 270 MB/s real 0m3.789s user 0m0.839s sys 0m2.527s
从null读数据到文件,块大小1024 数量1000000
测试读:
xxx@WaitFish:~ >time dd of=1Gb.file if=/dev/zero bs=1024 count=1000000 1000000+0 records in 1000000+0 records out 1024000000 bytes (1.0 GB) copied, 3.84934 s, 266 MB/s real 0m4.009s user 0m0.852s sys 0m2.698s从文件读数据到null,测试读性能
下面是机械盘的速度:
写性能:
sudo time dd if=/dev/zero bs=1024 count=1000000 of=1Gb.file 1000000+0 records in 1000000+0 records out 1024000000 bytes (1.0 GB) copied, 69.5384 s, 14.7 MB/s 1.62user 13.84system 1:09.56elapsed 22%CPU (0avgtext+0avgdata 704maxresident)k 72inputs+0outputs (2major+221minor)pagefaults 0swaps读性能:
xxx@WaitFish:/media/xx/新加卷 > sudo time dd of=1Gb.file if=/dev/zero bs=1024 count=1000000 1000000+0 records in 1000000+0 records out 1024000000 bytes (1.0 GB) copied, 71.2378 s, 14.4 MB/s 1.66user 14.34system 1:11.34elapsed 22%CPU (0avgtext+0avgdata 700maxresident)k 0inputs+0outputs (0major+224minor)pagefaults 0swaps
原文:http://blog.csdn.net/smallfish1983/article/details/38387961