linux nfs共享目录访问速度慢,性能 – 测量和评估已挂载的NFS共享上文件访问的速度和延迟...

what technique can I use to measure the I/O speed/latency/rate when

reading and writing files from that share?

您可以使用dd执行此操作：

# time dd if=/dev/zero of=/mnt/nfs/testfile bs=16k count=128k

131072+0 records in

131072+0 records out

2147483648 bytes (2.1 GB) copied, 111.656 seconds, 19.2 MB/s

real 1m51.678s

user 0m0.066s

sys 0m1.482s

# time dd if=/mnt/nfs/testfile of=/dev/null bs=16k

131072+0 records in

131072+0 records out

2147483648 bytes (2.1 GB) copied, 4.96762 seconds, 432 MB/s

real 0m4.969s

user 0m0.046s

sys 0m0.720s

(文件大小= bs * count应该是RAM的两倍)

或者看看一些基准工具：Bonnie++,IOzone,例如：

# bonnie++ -d /mnt/nfs/bonnie/ -s 2048 -r 1024 -u 0

Using uid:0, gid:0.

Writing a byte at a time...done