FBSD to FBSD NFS Mounts over IB.

Karl Pielorz kpielorz_lst at tdx.co.uk
Thu May 15 16:50:14 UTC 2014

--On 15 May 2014 08:50:25 -0600 "Janky Jay, III" <jankyj at unfs.us> wrote:

> 	I have set up one of the FBSD systems to run OpenSM and also be an NFS
> server which all the systems seem to be able to mount over the IB devices
> without any issue at all. Small reads and writes to and from the NFS
> server to all the other nodes also seems to work without any issue.
> However, if I try to dump large amounts of data using "dd" (in order to
> test speeds and stability), the FBSD NFS client craps out immediately. I
> just get the following message(s) over and over:
> newnfs server not responding
> newnfs server not responding

Can both sides 'ping' each other when this happens?

The reason I ask is I've hit a similar issue setting up ZFS over iSCSI on 
IPOIB (I'm not running connected mode).

At my end it looks like an ARP expires or something so the sides 'lose 
site' of each other. If 'A' can't see 'B' - a ping from 'B' to 'A' usually 
restores the connection.

Maybe make sure they can both still see each other outside of nfs - I can 
temporarily 'fix' the issue here by leaving both sides pinging each other - 
I've not really had a chance to look at it much recently...


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