>> I am chasing a NFS server performance issue on Ubuntu
>> 3.8.13-030813-generic kernel. We setup 32 NFSD threads on our NFS
>> server.
I have been also trying to figure out NFS performance issues at my home
office. Server is ubuntu precise (3.2.0-55, old, true) kernel, and clients
are mostly a mix of Debian versions (mostly virtualized XEN).
GbE over a VLAN is setup just for storage, and mostly IPv6 connections.
J. Bruce Fields <bfields@xxxxxxxxxxxx> wrote:
> Would you be willing to test an upstream kernel and/or some patches?
> Sounds like you're using only NFSv4?
I'm also willing to; my preference would be to build a generic 3.10 or 3.11
kernel with NFS as a module, and then update the NFS code, but I
haven't gotten around to scheduling some time to reboot a bunch.
What I observe is huge TCP send queues on the server and what appears to be
head of queue blocking on the client. This looks like a client issue to me,
and for at least one client (my mpd/shoutcast server), I'm happy to reboot
it regularly... I notice the NFS delays because the music stops :-)
There are some potential instabilities in frequency of IPv6 Router
Advertisements due to a bug in the CeroWRT, which initially I was blaming,
but I'm no longer convinced, since it happens over IPv4 on the storage VLAN
too.
Shyam, please share with me your testing strategy.
--
] Never tell me the odds! | ipv6 mesh networks [
] Michael Richardson, Sandelman Software Works | network architect [
] mcr@xxxxxxxxxxxx http://www.sandelman.ca/ | ruby on rails [
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