Probes fluctuation
Hello, I am running a number of one-off measurements and all what I request is 200 probes. However, I see a fluctuation in the number of participating probes (sometimes I get 198 and sometimes as low as 175). Any idea what is the issue? Thanks a lot, Rami
On 2019-04-27 14:30, Rami Al-Dalky wrote:
Hello,
I am running a number of one-off measurements and all what I request is 200 probes. However, I see a fluctuation in the number of participating probes (sometimes I get 198 and sometimes as low as 175). Any idea what is the issue?
Thanks a lot, Rami
Hi, There's no single best answer to this. It can be that you actually got the probes you wanted, but the results were delivered later than expected (see here: https://www.ripe.net/ripe/mail/archives/ripe-atlas/2019-April/003937.html) It's also possible that the system didn't allocate the probes to you -- either because they were too busy at certain times, or we couldn't talk to them, or there are not enough probes in general to satisfy your request. It's hard to tell what's the exact cause from this distance. Hope this helps, Robert
On 29/04/2019 11:59, Robert Kisteleki wrote:
... It's also possible that the system didn't allocate the probes to you -- either because they were too busy at certain times, or we couldn't talk to them, or there are not enough probes in general to satisfy your request. It's hard to tell what's the exact cause from this distance.
I have come across this question a number of times over the years. Wouldn't it be relatively straightforward to provide more information to the user about these conditions and decisions of the probe selection process? Daniel
On 30/04/2019 10:54, Daniel Karrenberg wrote:
I have come across this question a number of times over the years. Wouldn't it be relatively straightforward to provide more information to the user about these conditions and decisions of the probe selection process?
There is an ongoing work item that will achieve this. It isn't completely straightforward because probe selection is distributed and has multiple stages, but it is doable and would indeed be useful in various cases. Chris
participants (4)
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Chris Amin -
Daniel Karrenberg -
Rami Al-Dalky -
Robert Kisteleki