Hello,
No, I won't change the default SL network tuning parameters.
But I'm not against making that a SL rpm.  I think that would be good 
idea if everyone could agree on a batch of settings to put into an rpm.
Troy

Eli Dart wrote:
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> Hi all,
> 
> I hope this is the right list for discussion of this topic...
> 
> It appears that Scientific Linux is used by many science communities,
> but in particular by the HEP community.  The science community often has
> significant bulk data movement requirements that are outside the
> capabilities of the default network tuning parameters of most Linux
> distributions.
> 
> Would the Scientific Linux community consider changing the network
> tuning defaults for future releases?
> 
> ESnet maintains a site that explains network performance tuning and how
> to increase network performance - please see http://fasterdata.es.net/
> 
> However, we have recently seen several sites where the first thing that
> is needed is to change the network stack parameters so that
> high-performance wide-area data transfers are possible.
> 
> Note that with today's TCP autotuning and modern congestion recovery
> algorithms, one need not set up particular TCP parameters on a
> per-destination basis.  One need only give TCP autotuning enough buffer
> space to do its work and ensure that a modern congestion recovery
> algorithm is used (the default in Linux 2.6 has been cubic for a while,
> though 2.6.18 has bugs in cubic that significantly damage performance so
> for 2.6.18 one should use htcp instead).
> 
> Please see http://fasterdata.es.net/tuning.html and
> http://fasterdata.es.net/TCP-tuning/linux.html for linux-specific
> information.
> 
> Thoughts?  Comments welcome....
> 
> Many thanks,
> 
> 
> 		--eli
> 
> 
> - --
> Eli Dart                                            NOC: (510) 486-7600
> ESnet Network Engineering Group                          (800) 333-7638
> Lawrence Berkeley National Laboratory
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-- 
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Troy Dawson  [log in to unmask]  (630)840-6468
Fermilab  ComputingDivision/LCSI/CSI LMSS Group
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