Messages in this thread | | | From | "Andrew Theurer" <> | Subject | Re: [NFS] Re: [PATCH] zerocopy NFS for 2.5.36 | Date | Fri, 18 Oct 2002 10:12:12 -0500 |
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> > > Congestion avoidance mechanism of NFS clients might cause this > > > situation. I think the congestion window size is not enough > > > for high end machines. You can make the window be larger as a > > > test. > > > > The congestion avoidance window is supposed to adapt to the bandwidth > > that is available. Turn congestion avoidance off if you like, but my > > experience is that doing so tends to seriously degrade performance as > > the number of timeouts + resends skyrockets. > > Yes, you must be right. > > But I guess Andrew may use a great machine so that the transfer rate > has exeeded the maximum size of the congestion avoidance window. > Can we determin preferable maximum window size dynamically?
Is this a concern on the client only? I can run a test with just one client and see if I can saturate the 100Mbit adapter. If I can, would we need to make any adjustments then? FYI, at 115 MB/sec total throughput, that's only 2.875 MB/sec for each of the 40 clients. For the TCP result of 181 MB/sec, that's 4.525 MB/sec, IMO, both of which are comfortable throughputs for a 100Mbit client.
Andrew Theurer
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