测试磁盘读能力
Mon0001:~ #time dd if=/dev/vdb1 of=/dev/null bs=4k count=100000 100000+0 records in 100000+0 records out 409600000 bytes (410 MB) copied, 0.208081 s, 2.0 GB/s real 0m0.214s user 0m0.081s sys 0m0.128s
测试磁盘写能力
Mon0001:~ #time dd if=/dev/zero of=./testw.dbf bs=4k count=100000 100000+0 records in 100000+0 records out 409600000 bytes (410 MB) copied, 0.413967 s, 989 MB/s real 0m0.416s user 0m0.063s sys 0m0.343s
测试纯读取性能
dd if=test of=/dev/null bs=8k count=10000 iflag=direct Mon0001:~ #dd if=/root/test1.dbf of=/dev/null 800000+0 records in 800000+0 records out 409600000 bytes (410 MB) copied, 1.39531 s, 294 MB/s
测试纯写入性能
dd if=/dev/zero of=test bs=8k count=10000 oflag=direct