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[mc36 <>]

well, we all know what jitter is, rtt max - rtt min, also in my ping...
but still, once you have the series of rtt, imho all the others in the 
timemap just are a matter of calculation,
should be done elsewhere not on the router, or probably it's already doable 
in the promsql... frederic!?


On 8/23/22 16:40, Tim Chown wrote:
> Hi,
>
> Here’s a deck from March 2022 about the components used in TimeMap, slide 8 I 
> think is most useful:
> https://events.geant.org/event/1084/contributions/1022/attachments/672/942/Timemap_Anomaly_Detection_2ndPMW_2022_FFv1.pdf
>
> Calculation of jitter can be a subtle, nuanced thing.
>
> Tim
>
> > On 23 Aug 2022, at 15:33, mc36 <> wrote:
> >
> >
> >
> > On 8/23/22 16:23, mc36 wrote:
> > > On 8/23/22 16:18, mc36 wrote:
> > > > well, doable, and it's a separate class if i recall correctly, that is, 
> > > > readily reuseable,
> > > > and really not too time comsuming O(n), and i already do so for the ping 
> > > > because at that point,
> > > > it's useful to have at hand, but heyy, once you have the stream, why would 
> > > > one do so???
> > > lemme reverb this real quick...
> > > so that it's a separate class in freerouter, that is reuseable, but,
> > > since it's a calculated value from a series of data,
> >
> > so let's say we're already exporting the rtt as time series data,
> > then to have the deviation from the series is just a matter of calculation...
> > you can do it on the router surely, but if you do it elsewhere then you
> > must be able to select a time range to calculate the deviation from just 
> > those...
> >
> > the thing is that, it could be a completely different value:
> >
> > please take a look at the below two pings... i tried to start them at the 
> > same time...
> > they calculate the deviation obviously the same way, the difference is the 
> > time interval,
> > 1111 pings: min/avg/max/dev rtt=3/4.0/19/1.0
> > 2222 pings: min/avg/max/dev rtt=3/4.0/19/1.2
> >
> > probably, i had some more bigger responses when it ran twice the time and 
> > that's why the mean deviation 1.0 vs 1.2 mean deviation...
> >
> > br,
> > cs
> >
> >
> >
> >
> > noti#ping www.niif.hu repeat 1111
> > info userReader.cmdEnter:userReader.java:1087 command noti#ping www.niif.hu repeat 
> > 1111  from local:telnet <loop> 23 -> 127.0.0.1 58682
> > 2022-08-23 16:31:17
> > resolving www.niif.hu for ipv6 ok!
> > pinging 2001:738:0:420::b, src=2001:db8:1101::11, vrf=inet, cnt=1111, len=64, 
> > df=false, tim=1000, gap=0, ttl=255, tos=0, sgt=0, flow=0, fill=0, alrt=-1, 
> > sweep=false, multi=false
> > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!info
> >  userReader.cmdEnter:userReader.java:1087 command noti#ping www.niif.hu repeat 2222  
> > from local:telnet <loop> 23 -> 127.0.0.1 35006
> > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> > result=100.0%, recv/sent/lost/err=1111/1111/0/0, took 4603, min/avg/max/dev 
> > rtt=3/4.0/19/1.0, ttl 51/51.0/51/0.0, tos 0/0.0/0/0.0
> > noti#
> >
> >
> > noti#ping www.niif.hu repeat 2222
> > info userReader.cmdEnter:userReader.java:1087 command noti#ping www.niif.hu repeat 
> > 2222  from local:telnet <loop> 23 -> 127.0.0.1 35006
> > 2022-08-23 16:31:17
> > resolving www.niif.hu for ipv6 ok!
> > pinging 2001:738:0:420::b, src=2001:db8:1101::11, vrf=inet, cnt=2222, len=64, 
> > df=false, tim=1000, gap=0, ttl=255, tos=0, sgt=0, flow=0, fill=0, alrt=-1, 
> > sweep=false, multi=false
> > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> > result=100.0%, recv/sent/lost/err=2222/2222/0/0, took 9184, min/avg/max/dev 
> > rtt=3/4.0/19/1.2, ttl 51/51.0/51/0.0, tos 0/0.0/0/0.0
> > noti#