[atlas]Probe flapping
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Richard L. Barnes
rbarnes at bbn.com
Fri Dec 17 16:29:00 CET 2010
Also interesting: This event is pretty clearly visible in the "probe up count" graph: <http://atlas.ripe.net/dynamic/stats/stats.goal.png> On Dec 17, 2010, at 6:09 AM, Robert Kisteleki wrote: > Dear All, > > Here's an update to Daniel's message from yesterday. > > As Daniel mentioned, on Wednesday evening our system started to migrate the > probes away from a particular controller (ronin, in DE). We have a strong > suspicion on why this happened, but it's not confirmed so I'm not going to > publicly speculate :-) In any case, since we don't yet have enough spare > capacity to handle this situation, another controller was overloaded. > > We needed to fix the internal databases on these controllers, which took > some time. We were able to bring the system back to a stable state by the > afternoon. > > This morning we revived some probes (25 or so) which were in a limbo -- they > were not properly connected. We forced them to re-connect, so they are fine > now. There are still some of them, like 10 or so, which are not connected > (down) so we can't really help those from here. If your probe was working > properly before Wednesday, but now is down, then please power cycle it > (using the USB power) and it will very likely come back fine. > > Probes in the US (and Asia, very likely) were not affected, as they have a > local controller on the west coast, which was not involved. That's because > the system really doesn't like to send European probes to it, it's too far. > > Let us know if there's anything else not working properly, so that we can > look into it. > > Regards, > Robert > > > On 2010.12.16. 14:57, Daniel Karrenberg wrote: >> >> Intermediate update to keep those interested informed. >> I am writing this to keep the engineers free to work >> the problem. I do not know nitty gritty details, so >> this is a general overview. > > [...] >
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