Bull GNU/Linux NFSv4 project

NFSv3 - NFSv4 comparison

Test

write

rewrite

read

reread

randwrite

bkwdread

recrewrite

strideread

fwrite

frewrite

fread

freread

Comments

NFSv3 over UDP

results for rsize=32kb

NFSv3 over TCP

results for rsize=32kb

Conclusion

NFSv3 performances are better than NFSv4 when running NFSv3 over UDP.

NFSv4 and NFSv3 have same performances when running NFSv3 over TCP.

Conclusions are only valid for local networks as described below. there are not valid for others networks, in particular over Internet

If you are looking for a speed full NFS volume beware that running NFS over UDP may be unsafe.

Export options are : /export <world>(rw,wdelay,insecure,no_root_squash,no_subtree_check,fsid=0)

mount options, NFSv3, UDP : rsize=32768,wsize=32768,timeo=14,intr,noauto
mount options, NFSv3, TCP : proto=tcp,rsize=32768,wsize=32768,timeo=14,intr,noauto
mount options, NFSv4 : rsize=32768,wsize=32768,timeo=14,intr,noauto
Iozone command: iozone -+q 1 -ace -U /mnt/benchs_nfs -f /mnt/benchs_nfs/fichier_test
Linux 2.6.10 + CITI patch

2 processors : Intel(R) Xeon(TM) CPU 2.80GHz, cache 512 KB

Total memory: 2Gb

Ethernet: 1Gb/s link

Distribution : modified Fedora Core 2

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Page maintained by: Vincent Roqueta		Accessed times since its creation.
	Last update: 2005, September 23