首先这是一个不严谨的测试，Client和Server都是在有生产压力的情况下做额外测试，仅使用了一个Client和Server（仅使用三个Server中的一个），结果仅供参考。
NFS Client：mirrors.nju.edu.cn 的生产虚拟机，负载不轻，VMXNET 3网卡，主机万兆网卡，通过下面一个系统节点的IP挂载NFS。
mount -t nfs -o nfsvers=3,wsize=1048576,rsize=1048576,proto=tcp,async,lookupcache=none,timeo=600 x.x.x.x:/yaoge123 /mnt
NFS Server: UniverStor P20000 (ActiveScale P100) 5.5.0.40，三分之一配置，三个系统节点六个存储节点，box.nju.edu.cn的后端存储。
access_type=RW,clients=x.x.x.x,sec=sys
Iozone: Performance Test of File I/O
Version $Revision: 3.487 $
Compiled for 64 bit mode.
Build: linux-AMD64
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer,
Vangel Bojaxhi, Ben England, Vikentsi Lapa,
Alexey Skidanov, Sudhir Kumar.
Run began: Mon Aug 12 20:00:41 2019
Record Size 128 kB
File size set to 16777216 kB
Command line used: /root/iozone -i0 -i1 -r 128k -s 16g -t8
Output is in kBytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 kBytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
Throughput test with 8 processes
Each process writes a 16777216 kByte file in 128 kByte records
Children see throughput for 8 initial writers = 719571.23 kB/sec
Parent sees throughput for 8 initial writers = 693136.82 kB/sec
Min throughput per process = 89555.71 kB/sec
Max throughput per process = 90813.93 kB/sec
Avg throughput per process = 89946.40 kB/sec
Min xfer = 16543360.00 kB
Children see throughput for 8 rewriters = 721639.59 kB/sec
Parent sees throughput for 8 rewriters = 702820.53 kB/sec
Min throughput per process = 89371.36 kB/sec
Max throughput per process = 92429.21 kB/sec
Avg throughput per process = 90204.95 kB/sec
Min xfer = 16223744.00 kB
Children see throughput for 8 readers = 819373.91 kB/sec
Parent sees throughput for 8 readers = 819029.33 kB/sec
Min throughput per process = 101887.23 kB/sec
Max throughput per process = 102778.71 kB/sec
Avg throughput per process = 102421.74 kB/sec
Min xfer = 16634368.00 kB
Children see throughput for 8 re-readers = 825189.77 kB/sec
Parent sees throughput for 8 re-readers = 824947.40 kB/sec
Min throughput per process = 103080.87 kB/sec
Max throughput per process = 103243.56 kB/sec
Avg throughput per process = 103148.72 kB/sec
Min xfer = 16757248.00 kBIozone: Performance Test of File I/O
Version $Revision: 3.487 $
Compiled for 64 bit mode.
Build: linux-AMD64
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer,
Vangel Bojaxhi, Ben England, Vikentsi Lapa,
Alexey Skidanov, Sudhir Kumar.
Run began: Tue Aug 13 08:30:19 2019
Record Size 128 kB
File size set to 2097152 kB
Command line used: /root/iozone -i0 -i1 -i2 -r 128k -s 2g -t8
Output is in kBytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 kBytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
Throughput test with 8 processes
Each process writes a 2097152 kByte file in 128 kByte records
Children see throughput for 8 initial writers = 828709.60 kB/sec
Parent sees throughput for 8 initial writers = 625811.47 kB/sec
Min throughput per process = 89453.18 kB/sec
Max throughput per process = 113444.66 kB/sec
Avg throughput per process = 103588.70 kB/sec
Min xfer = 1662848.00 kB
Children see throughput for 8 rewriters = 850283.30 kB/sec
Parent sees throughput for 8 rewriters = 672423.37 kB/sec
Min throughput per process = 100863.54 kB/sec
Max throughput per process = 115805.04 kB/sec
Avg throughput per process = 106285.41 kB/sec
Min xfer = 1830784.00 kB
Children see throughput for 8 readers = 799100.11 kB/sec
Parent sees throughput for 8 readers = 796371.21 kB/sec
Min throughput per process = 98683.31 kB/sec
Max throughput per process = 103026.41 kB/sec
Avg throughput per process = 99887.51 kB/sec
Min xfer = 2011648.00 kB
Children see throughput for 8 re-readers = 824877.78 kB/sec
Parent sees throughput for 8 re-readers = 823455.08 kB/sec
Min throughput per process = 102881.04 kB/sec
Max throughput per process = 103626.41 kB/sec
Avg throughput per process = 103109.72 kB/sec
Min xfer = 2088448.00 kB
Children see throughput for 8 random readers = 415811.13 kB/sec
Parent sees throughput for 8 random readers = 414555.11 kB/sec
Min throughput per process = 30050.71 kB/sec
Max throughput per process = 142421.50 kB/sec
Avg throughput per process = 51976.39 kB/sec
Min xfer = 442880.00 kB
Children see throughput for 8 random writers = 32076.26 kB/sec
Parent sees throughput for 8 random writers = 15830.50 kB/sec
Min throughput per process = 2661.41 kB/sec
Max throughput per process = 6257.78 kB/sec
Avg throughput per process = 4009.53 kB/sec
Min xfer = 1048320.00 kB