[OpenIndiana-discuss] NFS performance tuning

[James Carlson]

On 08/29/13 14:58, Francis Swasey wrote:
> Hi,
> 
> I've trying to set up an OI box (using 151a8) and I'm using nuttcp 6.1.2 to make sure I'm getting the most I can out of the Emulex One Connect (10GbE) cards that are in the box they gave me to use.  Unfortunately, I'm seeing asymmetrical numbers.
> 
> The clients are all RHEL6 boxes (and that can't be changed), which happily talk 9.8Gb between themselves on the exact same hardware I am having issues with OI on.  However, when I test between the Linux boxen and the OI box - I always get 9.8Gb from the OI box to the RHEL6 and around 5Gb from the RHEL6 box to the OI box.
> 
> I've been googling for tunables and have found https://blogs.oracle.com/dlutz/entry/maximizing_nfs_client_performance_on .   However, a lot of what it says to tune doesn't exist.  Is there a better document for me to read?
> 

That sounds like the standard NFS sync behavior.  See this discussion
for more details:

http://comments.gmane.org/gmane.os.solaris.opensolaris.zfs/47934

Basically, it's "fast / cheap / robust -- pick any two."

-- 
James Carlson         42.703N 71.076W         <carlsonj at workingcode.com>