NFS Server

[Mike Poublon]

Rick Stevens wrote:

>On Fri, 2005-11-11 at 14:36 -0500, Mike Poublon wrote:
>  
>
>>I'm working on setting up an NFS file server using Fedora Core 4. The NFS 
>>shares will be accessed by compute nodes inside of a cluster computer. I've 
>>successfully done this in the past, but due to some recent hardware changes 
>>have run into a slight issue. The server (also head node of the cluster) has 
>>Gigabit network cards. 9 of the compute nodes (NFS Clients) do not, they have 
>>10/100 nics. There are also 5 compute nodes that do have gigabit cards. The 
>>problem is this:
>>
>>When the nodes with gigabit cards mount an NFS share everything works fine. 
>>When the 10/100 nodes try to mount, they are successful, but can't read large 
>>files (~600mb). They display the error message
>>
>>server <hostname> not responding, still trying
>>
>>and sit there not realling doing much (as far as i can tell).
>>
>>The MTU is set at the default of 1500 on all of the NICS (gigabit and 10/100).
>>
>>If anyone has seen this problem and knows a way around it I'd appreciate some 
>>hints.
>>    
>>
>
>It's not uncommon for autonegotiation to not really work between your
>machines and the switch/router.  It would help if we knew what switch
>you're using and the makes of the 10/100 cards.
>
I'm using Intel Pro 100 cards (drivermodule e100) and the switch is a 
Netgear GS524.

>In lieu of that info, see if you can turn off autonegotiation on both
>the switch ports connected to the 10/100 machines and the machines
>themselves and force 100Mb, full duplex on both ends.  See if that
>helps.
>
>  
>
I'd prefer not to switch everything back to 100Mb if I don't have to. 
The reason this came up is because
of a recent upgrade to the gigabit switch (it was a 10/100 switch 
before). The thought was that having a gigabit
path to the server would help out on performance.

>----------------------------------------------------------------------
>- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
>- VitalStream, Inc.                       http://www.vitalstream.com -
>-                                                                    -
>-               The Theory of Rapitivity: E=MC Hammer                -
>-                                  -- Glenn Marcus (via TopFive.com) -
>----------------------------------------------------------------------
>
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