On Tue, 2010-01-05 at 09:23 -0600, [email protected] wrote: > Happy new year everyone. So we've been trying to tackle this problem with > sending files via ssh (scp/sftp) for a while now. Red Hat says that no one > else is reporting the problem, and while they have narrowed down the origin > of the issue, they haven't been able to resolve it except by removing the > patch. There is a public bugzilla about it > (https://bugzilla.redhat.com/show_bug.cgi?id=508914). > > We are only seeing the transfer issues when it goes across our WAN. > average number of hops ~11, avg latency 70-80ms. > > With a version pre 4.3p2-28 we can transfer just fine. As of 4.3p2-28, > which has the addition of the patch from Bugzilla #227722 (improve transfer > speed on high latency connections), it stalls on anything over a couple of > megabytes. They have tried giving us a couple of other packages, but the > problem persists as long as that patch is in place. > > I'm just curious if anyone else has been having issues and just hasn't > reported it? > > -greg
This sounds similar to issues we had with broken load balancers which did not handle TCP window scaling (these were in front of a web server which yielded terrible performance to RHEL 5 hosts). For a discussion about the window scaling issue, see: http://lwn.net/Articles/92727/ You could try their suggestion for turning off the window scaling (or the alternate reduction of the outgoing TCP buffer size mentioned rather far down in the article) to see if this has come into play. Andy _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
