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Re: 20011008: IDD latencies at PSU (cont.)

Mike Schmidt wrote:
> 

> > Then, you can run it on the machine with 'iperf -s -w 16K' for a server
> > with a 16K TCP window. That window size is probably low for the rtt
> > time between PSU and NCAR, but it should do for a start. I don't
> > remember if LDM adjusts it's window or segment size.
>
> and agree that it may be appropriate to bump the window size to 64K
> or more given the circumstances.
> 
> I'm not intimately familiar with the LDM code, but I'm relatively sure
> that it doesn't do any sort of on-the-fly connection tuning.  On our
> end, we turn up the system defaults on the (Solaris) LDM server.
>


The LDM sends in 16K blocks or less.   Is this pertainent to "window
size"?  And, no, I don't believe there is any dynamic tuning.

Anne
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Anne Wilson                     UCAR Unidata Program            
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                                  Boulder, CO  80307
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