NFS Optimization: Difference between revisions
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===Client Side=== | ===Client Side=== | ||
=====/etc/fstab===== | =====/etc/fstab===== | ||
NFSv4 Client: | |||
<pre>192.168.15.20:/mnt/raid5 /mnt/raid5 nfs defaults 0 0</pre> | |||
NFSv3 Client: | |||
<pre>192.168.15.20:/mnt/raid5 /mnt/raid5 nfs rsize=32768,wsize=32768,intr,hard 0 0</pre> | <pre>192.168.15.20:/mnt/raid5 /mnt/raid5 nfs rsize=32768,wsize=32768,intr,hard 0 0</pre> | ||
[rw]size=32768 - NFSv3 maximum read write size | [rw]size=32768 - NFSv3 maximum read write size<br/> | ||
intr - if the mount drops, you'll still be able to ^C out of whatever operation your running | intr - if the mount drops, you'll still be able to ^C out of whatever operation your running<br/> | ||
hard - hm? | hard - hm?<br/> | ||
Revision as of 21:24, 19 September 2011
Server Side
/etc/exports
/mnt/raid5 192.168.15.142/32(rw,async,no_root_squash)
async - dramatic throughput increase, but dangerous if a client does not unmount cleanly..
Tuning /etc/sysctl.conf
net.core.rmem_default = 262144
net.core.rmem_max = 262144
#
# Increase the fragmented packet queue length
net.ipv4.ipfrag_high_thresh = 524288
net.ipv4.ipfrag_low_thresh = 393216
echo 0 > /proc/sys/net/ipv4/tcp_sack echo 0 > /proc/sys/net/ipv4/tcp_timestamps
TCP Segmentation offload
This will take off some of the tcp overhead if your card supports it..
# ethtool -K ethN tso on
Client Side
/etc/fstab
NFSv4 Client:
192.168.15.20:/mnt/raid5 /mnt/raid5 nfs defaults 0 0
NFSv3 Client:
192.168.15.20:/mnt/raid5 /mnt/raid5 nfs rsize=32768,wsize=32768,intr,hard 0 0
[rw]size=32768 - NFSv3 maximum read write size
intr - if the mount drops, you'll still be able to ^C out of whatever operation your running
hard - hm?