Find an NFS tuning guide... google. Most things like block size, etc.
are tunable for NFS, and it may just be that you need to tune the r/w
block sizes.
Eg. for Solaris:
# Maximize NFS block size
* Solaris 8 has a max of 32k
* Solaris 9 allows up to 1MB! (Solaris 9 NFS Server required)
# Set nfs3_bsize and nfs3_max_transfer_size system parameter on client
and server
* Futher tuning down of blocksize can be done via mount options:
rsize, wsize
On Fri, Apr 4, 2008 at 2:08 PM, Dustin Puryear <[EMAIL PROTECTED]> wrote:
> I'm curious if anyone has had any performance issues with NFS over GigE?
> We are bringing up a pretty standard VMware scenario: VMware servers
> are connected to GigE with bonded pair and our Dell NF500 NAS is running
> RAID10. Fast and easy. Only..
>
> The NFS performance sucks. I need to get some firm numbers, but it looks
> like we can't get NFS to perform better than if it were on a Fast
> Ethernet network. That said, if we change over to mounting our VM
> filesystem using CIFS we can scream at pretty much wire speeds. (By the
> way, if using CentOS 5.0 and mount.cifs, upgrade to 5.1 because the 5.0
> kernel will panic sometimes with a mounted CIFS in high usage.)
>
> Here's out setup:
>
> 2 Dell 1850's CentOS 5.1 with Intel GigE cards (2 cards each, 2 ports
> per card, 1 card = bonded pair = VMware Network, 1 card = 1 port = Admin
> Network)
>
> 1 Dell NF500 running Windows Storage Server 2003 with 4 disk RAID10 and GigE
>
> Regardless of whether we use bonding/LAG (Dell PowerConnect 5000+) or
> just simple GigE over one port, our NFS sucks it. CIFS screams though
> and pretty much saturates the connection.
>
> Right now I've tested Linux <--> NAS. When I have time I'll try Linux to
> Linux.
>
> --
> Dustin Puryear
> President and Sr. Consultant
> Puryear Information Technology, LLC
> 225-706-8414 x112
> http://www.puryear-it.com
>
> Author, "Best Practices for Managing Linux and UNIX Servers"
> http://www.puryear-it.com/pubs/linux-unix-best-practices/
>
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