http://bugzilla.novell.com/show_bug.cgi?id=557760
http://bugzilla.novell.com/show_bug.cgi?id=557760#c10
Jon Nelson changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |ASSIGNED
Info Provider|jnelson-suse@jamponi.net |
--- Comment #10 from Jon Nelson 2009-12-15 02:26:59 UTC ---
I would ignore the read speeds for now.
The write speeds are pretty bad.
Can NFSv4 work over UDP?
I just re-tested.
On an otherwise totally idle server and client, with no other meaningful
traffic on the switch whatsoever:
101911552 bytes (102 MB) copied, 59.5694 s, 1.7 MB/s
The server's storage looks like this:
4x SATA disks arranged as a raid6, lvm on top of that, and jfs (for this
filesystem) on top of that.
Local I/O for comparison (caches dropped): 33.2MB/s. Not awesome but
substantially better than 1.7MB/s.
I gave UDP a try.
It did not go well.
I got a *lot* of this:
[ 2535.582524] nfs: RPC call returned error 88
[ 2535.582543] nfs: RPC call returned error 88
[ 2535.582554] nfs: RPC call returned error 88
[ 2535.582563] nfs: RPC call returned error 88
slightly less than 3000 lines worth, AND, the following gem:
jnelson@frank:~> dd if=/dev/zero of=/multimedia/foo bs=1k count=100000
dd: closing output file `/multimedia/foo': Socket operation on non-socket
jnelson@frank:~>
Whaaa?
and then lots and lots of I/O errors.
So I gave up on UDP (NFSv4).
How large of a tcpdump would you need?
My last (quick) test was:
101963776 bytes (102 MB) copied, 103.186 s, 988 kB/s
Mount options:
rw,noatime,nodiratime,hard,intr,noacl,rsize=32768,wsize=32768
Raw TCP sends from this box: 111303.89kB/s -- 109MB/s for blasting TCP from
the client to the server as fast as they can each send/receive. I don't think
it's the hardware. ;-)
(as a side note, setting the MTU on the client to 8200 makes performance DROP
considerably: to a mere 72MB/s)
I'm at your disposal.
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