perfSONAR User Q&A and Other Discussion

["Garnizov, Ivan (RRZE)" <>]

Hi Brent,

 

Thanks for your suggestion. In general I find it a good idea to the moment until the automated processing of the capture.

My point here is, that measurement instruments, should be optimized for measurements and analysis of data should happen elsewhere.

Still I also do miss the ability to capture the traffic for a specific measurement and end up doing long interval captures (~15min), since the measurement is not produced immediately.

 

Regards,

Ivan Garnizov

 

GEANT SA1T2: pS deployments GN Operations

GEANT SA2T3: pS development team

GEANT SA3T5: eduPERT team

 

-----Original Message-----
From: Brent Draney [mailto:] On Behalf Of Brent Draney
Sent: Freitag, 23. Juni 2017 20:01
To:
Subject: [perfsonar-user] Potential enhancement for perfsonar

 

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