perfSONAR User Q&A and Other Discussion

[Ji-Sun Kim <hideaway@vt.edu>]

Hi Andy,

Thank you for your follow-up message.

I attempted the -m option in the 'ndt' file but it didn't work.

The multiple connections worked but nothing happened further. None of clients started the test with ndt or failed but just waited forever. With the -m option, even a single client didn't start testing. I also attempted to use "--mrange port1:port2" that didn't work either.

I searched the mailing list archive. It seemed that "-m" was used to be working before but I am not sure if it still works...

FYI, here is the software version list that I am currently using.

Software Versions
pS-Performance Toolkit    3.4.2 (3.4.2-13.pSPS)
BWCTL    1.5.4-1.el6
OWAMP    3.4-10.el6
NDT    3.7.0.2-1.el6
NPAD    1.5.6-3.el6
esmond Measurement Archive    1.0-14.el6
perfSONAR-PS Regular Testing Daemon    3.4.2-5.pSPS
iperf3    3.0.11-1.el6

Please let me know if there is any other suggestion that I can try.

(I also posted the same question to the ndt-users mailing-list.)

Thanks!

Kim

On Thu, Aug 13, 2015 at 9:26 AM, Andrew Lake <andy@es.net> wrote:

Hi,

The original NDT developer just informed me that you can do this by adding the “-m” option to your ndt server command. Assuming this is on a toolkit host using the NDT RPM, you can update the existing WEB100SRV_OPTIONS variable to include -m in the file /etc/sysconfig/ndt. Run "/etc/init.d/ndt restart” after the change and you should be able to run multiple tests. 

Thanks,

Andy

On Thu, Aug 13, 2015 at 9:19 AM, Andrew Lake <andy@es.net> wrote:

Hi,

As far as I know there is not a way to change the behavior. This is by design so that tests do not interfere with each other. There is also an ndt-users@internet2.edu mailing list where there might be others that know some tricks of which I am unaware. 

Thanks,

Andy

On Wed, Aug 12, 2015 at 12:56 PM, Ji-Sun Kim <hideaway@vt.edu> wrote:

Hello,

I would like to make my NDT/PerfSONAR server handle multiple requests from Web (http) clients simultaneously. It seems that the default setting only allows a single request.

I appreciate if anyone can help on it.

Thanks!

Kim