From: Nikolaus Rath <Nikolaus@rath.org>
To: linux-nfs@vger.kernel.org
Subject: Re: NFS4 over VPN hangs when connecting > 2 clients
Date: Mon, 12 Mar 2012 12:20:17 -0400 [thread overview]
Message-ID: <87pqchn64e.fsf@inspiron.ap.columbia.edu> (raw)
In-Reply-To: <878vj7x6mj.fsf@vostro.rath.org> (Nikolaus Rath's message of "Sat, 10 Mar 2012 20:34:44 -0500")
Nikolaus Rath <Nikolaus-BTH8mxji4b0@public.gmane.org> writes:
> The problem is that as soon as more than three clients are accessing the
> NFS shares, any operations on the NFS mountpoints by the clients hang.
> At the same time, CPU usage of the VPN processes becomes very high. If I
> run the VPN in debug mode, all I can see is that it is busy forwarding
> lots of packets. I also ran a packet sniffer which showed me that 90% of
> the packets were NFS related, but I am not familiar enough with NFS to
> be able to tell anything from the packets themselves. I can provide an
> example of the dump if that helps.
I have put a screenshot of the dump on
http://www.rath.org/res/wireshark.png (the full dump is 18 MB, and I'm
not sure which parts are important).
Any suggestions how I could further debug this?
Best,
-Nikolaus
--
»Time flies like an arrow, fruit flies like a Banana.«
PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C
next prev parent reply other threads:[~2012-03-12 16:28 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-11 1:34 NFS4 over VPN hangs when connecting > 2 clients Nikolaus Rath
2012-03-12 16:20 ` Nikolaus Rath [this message]
2012-03-12 19:31 ` J. Bruce Fields
2012-03-12 19:45 ` Nikolaus Rath
2012-03-12 20:15 ` J. Bruce Fields
2012-03-12 20:30 ` Nikolaus Rath
2012-03-12 20:42 ` J. Bruce Fields
2012-03-12 20:49 ` Chuck Lever
2012-03-12 21:04 ` J. Bruce Fields
2012-03-12 21:14 ` Chuck Lever
2012-03-12 21:27 ` J. Bruce Fields
2012-03-19 16:28 ` J. Bruce Fields
2012-03-19 16:44 ` [nfsv4] " Rick Macklem
2012-03-19 17:06 ` Rick Macklem
2012-03-19 17:36 ` J. Bruce Fields
2012-03-19 17:47 ` Chuck Lever
2012-03-19 18:24 ` Myklebust, Trond
2012-03-19 18:27 ` J. Bruce Fields
2012-03-19 18:29 ` Chuck Lever
2012-03-19 18:39 ` J. Bruce Fields
2012-03-19 18:42 ` Chuck Lever
2012-03-19 18:54 ` J. Bruce Fields
2012-03-19 19:00 ` Chuck Lever
2012-03-19 19:08 ` J. Bruce Fields
2012-03-19 18:43 ` Nikolaus Rath
2012-03-19 22:25 ` Rick Macklem
2012-03-20 13:29 ` Nikolaus Rath
2012-03-20 13:55 ` Myklebust, Trond
2012-03-20 14:36 ` Nikolaus Rath
2012-03-20 16:49 ` Myklebust, Trond
2012-03-20 14:01 ` Chuck Lever
2012-03-20 14:38 ` Nikolaus Rath
2012-03-20 15:53 ` Chuck Lever
2012-03-19 18:51 ` Nikolaus Rath
2012-03-19 18:56 ` J. Bruce Fields
2012-03-19 22:31 ` Rick Macklem
2012-03-19 18:26 ` Myklebust, Trond
2012-03-12 21:24 ` Nikolaus Rath
2012-03-12 21:27 ` Chuck Lever
2012-03-12 21:38 ` Nikolaus Rath
2012-03-12 21:46 ` Chuck Lever
2012-03-12 21:54 ` Chuck Lever
2012-03-12 21:54 ` Nikolaus Rath
2012-03-12 21:57 ` Myklebust, Trond
2012-03-13 13:23 ` Nikolaus Rath
2012-03-13 14:50 ` Myklebust, Trond
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