NFS performance / diagnostic profiling with TCP

NFS performance / diagnostic profiling with TCP

[ntwrkd]

Does anyone have some methods for doing diagnostic / performance
profiling while using NFS over TCP?

Thanks in advance,
Matthew Sacks
matthewsacks.com

Re: NFS performance / diagnostic profiling with TCP

[Andrew Bell]

On Tue, Jul 15, 2008 at 1:18 PM, ntwrkd <ntwrkd@gmail.com> wrote:
> Does anyone have some methods for doing diagnostic / performance
> profiling while using NFS over TCP?

There's nfsstat.  Do you want something more than that?

-- 
Andrew Bell
andrew.bell.ia@gmail.com

Re: NFS performance / diagnostic profiling with TCP

[ntwrkd]

Yes
------Original Message------
From: Andrew Bell
Sender: 
To: linux-nfs@vger.kernel.org
Sent: Jul 15, 2008 11:31 AM
Subject: Re: NFS performance / diagnostic profiling with TCP

On Tue, Jul 15, 2008 at 1:18 PM, ntwrkd <ntwrkd@gmail.com> wrote:
> Does anyone have some methods for doing diagnostic / performance
> profiling while using NFS over TCP?

There's nfsstat.  Do you want something more than that?

-- 
Andrew Bell
andrew.bell.ia@gmail.com
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Sent from my Verizon Wireless BlackBerry

Re: NFS performance / diagnostic profiling with TCP

[Shehjar Tikoo]

You could use a tool like iozone, bonnie or nfsreplay to
generate a workload against the server and collect profiling samples
using oprofile. I ran a bunch of tests some time back using nfsreplay,
see the results on the page below as a sample of the kind of data you
could generate using oprofile:

http://www.gelato.unsw.edu.au/IA64wiki/NFSServerPerformance#head-b5a633e0fccdde424b0395181f90efa08d56d048


Shehjar

ntwrkd wrote:
> Does anyone have some methods for doing diagnostic / performance 
> profiling while using NFS over TCP?
> 
> Thanks in advance, Matthew Sacks matthewsacks.com -- To unsubscribe
>  from this list: send the line "unsubscribe linux-nfs" in the body 
> of a message to majordomo@vger.kernel.org More majordomo info at 
> http://vger.kernel.org/majordomo-info.html

Re: NFS performance / diagnostic profiling with TCP

[Dean Hildebrand]

ntwrkd wrote:
> Does anyone have some methods for doing diagnostic / performance
> profiling while using NFS over TCP?
>   
Using tcpdump with tcptrace is really handy. 
You do something like:
tcpdump -s 100 -w /tmp/tcpdump.out host <hostname>
tcptrace -Sl /tmp/tcpdump.out
xplot /tmp/a2b_tsg.xpl

One very important thing to remember, if you are interested in how the 
tcp window is scaling, is to start tcpdump before you mount the server.  
The tcp window size depends on a scaling factor that it gets when the 
tcp connection is created (which is at mount time).

Dean


> Thanks in advance,
> Matthew Sacks
> matthewsacks.com
> --
> To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
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>