linux测试硬盘读写操作

使用hdparm工具或者time、dd命令测试硬盘读写性能

# hdparm

for i in {0..9}; do hdparm -tT /dev/sdc; done

root in summer in ~ took 13s 
➜  hdparm -tT --direct /dev/sdc1

/dev/sdc1:
 Timing O_DIRECT cached reads:   122 MB in  2.00 seconds =  60.99 MB/sec
 Timing O_DIRECT disk reads: 1018 MB in  3.15 seconds = 323.27 MB/sec
root in summer in ~ took 14s 
➜

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2秒钟读取了122 MB（缓存读）的数据，每秒的速度60.99 MB/sec
3.15秒钟读取了1018 MB （物理读）的数据，每秒的速度323.27 MB/sec

# dd+time

简单测试硬盘的写速率

root in summer in ceph/osd/ceph-2 
➜ time dd if=/dev/zero of=/var/lib/ceph/osd/ceph-2/xsw4 bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.102372 s, 1.0 GB/s

real    0m0.148s
user    0m0.000s
sys     0m0.081s
root in summer in ceph/osd/ceph-2 
➜ du -sh *
100M    xsw4
root in summer in ceph/osd/ceph-2 
➜

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简单测试硬盘的读速率

root in summer in ceph/osd/ceph-2 
➜ time dd if=/var/lib/ceph/osd/ceph-2/xsw4 of=/dev/null bs=1M 
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.0294975 s, 3.6 GB/s

real    0m0.033s
user    0m0.001s
sys     0m0.031s
root in summer in ceph/osd/ceph-2 
➜

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#linux

上次更新: 4/9/2021, 1:48:41 PM

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