perfSONAR User Q&A and Other Discussion

[Aaron Brown <>]

Hey Raphael,

On Aug 26, 2014, at 9:40 AM, Raphael Dourado <> wrote:

Hi Aaron!

Thanks for your explanation. But in my case, each toolkit end up performing (or saving) only the reverse-direction tests (loss reverse, owd reverse...), as depicted in the screenshot I sent in the first email. This is causing some confusion when clients try to retrieve data directly from an MA, because the results of a test A->B are stored in B, not in A.

Is there a way to force the mesh to not generate reverse-direction tests?

The mesh configuration has hosts do "receive side” tests instead of “send side” tests because the owamp tests are vastly less likely to have problems in that direction. There isn’t a way to force all hosts to only do send side tests, other than to use the “force_bidirectional” trick I noted below. I’m not sure why this would cause problems with clients though.

Cheers,

Aaron

Cheers,

Raphael Augusto Dourado.

http://www.cin.ufpe.br/~rasd2/

On Tue, Aug 26, 2014 at 9:30 AM, Aaron Brown <> wrote:

Hey Andrew,

Unidirectionality is the default behavior to avoid redundant tests. The idea being, if your mesh has hosts A and B in it, and they’re performing tests to each other, if A runs tests from A to B, and from B to A, and B runs tests from A to B, and B to A, it’d double the number of tests that the mesh as a whole is running. If you use MaDDash, it’ll grab the results from the mesh as a whole and display them. If you’d like to have both A and B run both tests, you can set “force_bidirectional” to "1” in the test definition.

Cheers,

Aaron

On Aug 25, 2014, at 6:00 PM, Andrew Grabowski <> wrote:

Hi Raphael and List,

I also have the same problems. I have a full mesh configured and the tests are being reported as not being bi-directional. I thought it might be an issue with the bwctld and owampd limits.. But it is not... 

On top of Raphael's observations,I also notice this on my maddash dashboard. All of the boxes are half empty... (Or half full depending on how you look at it...)

Anyone have any success fixing this?

Thank you,

Andrew Grabowski

On Fri, Aug 15, 2014 at 12:16 PM, Raphael Dourado <> wrote:

Hi!

I have a set of pSPT servers configured to perform OWAMP and BWCTL tests in full-mesh, using the Mesh Configuration tool. 

The problem is that these servers end up performing only unidirectional, reverse-direction tests, as shown in the figure below, taken from on of the nodes (10.132.0.60):

<image.png>

Probably this is just some problem with my configuration files. Please find attached the following files:

• myconf.conf and myconf.json: mesh configuration files
• owmesh.conf: resulting owmesh of one of my nodes, after running the "generate_configuration" script 
• agent_configuration.conf: mesh agent configuration file I'm using on each node

At first I thought it was because I enabled the "skip redundant tests" option on the agent_configuration.conf file, but then I commented it and ran the "generate_configuration" script again, but no changes were made in the owmesh file.

Best,

Raphael Augusto Dourado.