perfSONAR User Q&A and Other Discussion

[Brent Draney <>]

Hi All,
When performance tends to drop my best go-to tool is to take a tcpdump 
capture and run it
through TCPtrace and generate a time sequence graph and plot it using xplot.  
I was wondering
if others thought it would be a useful enhancement to perfsonar to be able to 
request that the
perfsonar node automatically dump the first (1000?) packets and generate the 
plot file and make 
the dump available for download and generate a graphic of the plot file.  

I’m sure that it would NOT be something that we would want for every test as 
there is significant 
overhead in just taking the dump but I suspect that it would significantly 
cut down the time to
resolution for problems in the network.

Do others have thoughts on whether this is a good or bad idea (or a waste of 
cycles)?

Thanks,
Brent
NERSC Networking