[atlas] *-capable ≠ *-works + *-doesnt-work
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Bajpai, Vaibhav
v.bajpai at jacobs-university.de
Wed Apr 20 13:32:19 CEST 2016
> On 19 Apr 2016, at 15:07, Chris Amin <camin at ripe.net> wrote: > > On 19/04/2016 11:07, Bajpai, Vaibhav wrote: > >> I am looking at the probe API data for connected probes (status = 1) for day = 20160418 >> >> system-ipv6-capable = 3556 >> system-ipv6-works = 2995 >> system-ipv6-doesnt-work = 710 >> >> Why is system-ipv6-works + system-ipv6-doesnt-work > system-ipv6-capable? >> >> system-ipv4-capable = 9336 >> system-ipv4-works = 9187 >> system-ipv4-doesnt-work = 67 >> >> Why is system-ipv4-works + system-ipv4-doesnt-work < system-ipv4-capable? > > Dear Vaibhav, > > You are right that system-ipv6-works + system-ipv6-doesnt-work should be > a subset of system-ipv6-capable. The -works and -doesnt-work tags are > assigned based on measurement results from the past few hours, and there > appears to be a bug whereby probes are continuing to carry out IPv6 > measurements even when they no longer have IPv6 capability. This > understandably results in unsuccessful results, which triggers the > "doesnt-work" tag. Thank you for pointing this out to us, we are working > on a fix now. Oh! OK. > The other case (system-ipv4-works + system-ipv4-doesnt-work < > system-ipv4-capable) makes more sense, because it's possible that a > probe is marked as "capable" but doesn't actually return any measurement > results for some reason -- for instance, it may be able to connect to > the controller over IPv4 -- so we know for sure that it is "capable" of > IPv4 -- but isn't able to report any IPv4 measurement results because of > a faulty SD card, which isn't reflective of an IPv4 issue per se. We > only mark a probe as "ipvX-doesnt-work" when we actually get > unsuccessful results back from it, so in some cases a probe will have > neither "works" nor "doesnt-work" tags. This is useful information. Thanks for sharing > Kind regards, > Chris Amin Best, Vaibhav =================================== Vaibhav Bajpai www.vaibhavbajpai.com Room 91, Research I School of Engineering and Sciences Jacobs University Bremen, Germany =================================== -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 496 bytes Desc: Message signed with OpenPGP using GPGMail URL: <https://lists.ripe.net/ripe/mail/archives/ripe-atlas/attachments/20160420/c1f0ce82/attachment.sig>
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