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: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > 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 > PGP Key fingerprint = C970 F8D3 CFDD 8FFF 5486 343A 2D31 4478 5F82 B2B3 > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (Darwin) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iEYEARECAAYFAkpXjZsACgkQLTFEeF+CsrNgwwCfWIdWXFJgFicBRx8MjmOrME87 > r8AAn14OAESa9ciJTBKasfUsof5lW4Wv > =gifQ > -----END PGP SIGNATURE----- -- __________________________________________________ Troy Dawson [log in to unmask] (630)840-6468 Fermilab ComputingDivision/LCSI/CSI LMSS Group __________________________________________________