[rrd-users] More observations and questions on COUNTER

[Tobias Oetiker]

Hi Philip,

about storing NAN, I would suggest the following:

Yesterday Philip Peake wrote:

> On 10/23/2010 10:49 AM, Simon Hobson wrote:
> > I don't want to see what's in the database. Please provide a set of
> > update values that reproduce the problem. If we don't know what went
> > in, then we cannot even guess at whether what comes out is correct or
> > not.
>
> Ok - added a print of the data that is supplied to rrdtool, then dropped
> the connection to force a read error.
>
> This is what was passed to the DB:
>
> 1287865680:80720496:21353409:88678191:121292820:21641300:65478015:23557328:95055770:104725771
> 1287865710:80721285:21354274:88679077:121294030:21642052:65480082:23558714:95056884:104726886
> 1287865740:80722122:21355290:88679970:121294992:21642728:65482047:23559995:95057766:104728008
> 1287865770:80723194:21356148:88680872:121295888:21643313:65484024:23561517:95058921:104729359
1287865780:U:U:U:U:U:U:U:U:U
1287865781:0:0:0:0:0:0:0:0:0
> 1287865830:0:0:0:0:0:0:0:0:0
> 1287865860:0:0:0:0:0:0:0:0:0
> 1287865890:0:0:0:0:0:0:0:0:0
> 1287865920:0:0:0:0:0:0:0:0:0
> 1287865950:0:0:0:0:0:0:0:0:0
> 1287865980:0:0:0:0:0:0:0:0:0
> 1287866010:0:0:0:0:0:0:0:0:0
> 1287866040:0:0:0:0:0:0:0:0:0
> 1287866070:0:0:0:0:0:0:0:0:0
> 1287866100:0:0:0:0:0:0:0:0:0
> 1287866130:0:0:0:0:0:0:0:0:0
> 1287866160:0:0:0:0:0:0:0:0:0
> 1287866190:0:0:0:0:0:0:0:0:0
> 1287866220:0:0:0:0:0:0:0:0:0
> 1287866250:0:0:0:0:0:0:0:0:0
> 1287866280:80739444:21371669:88696608:121313195:21655956:65519543:23582106:95072573:104743263
> 1287866310:80740228:21372452:88697358:121314100:21656508:65521468:23583236:95073263:104743944
> 1287866340:80740899:21373269:88698173:121315111:21657190:65523385:23584208:95073908:104744613
> 1287866370:80741789:21374232:88699086:121316178:21657895:65525380:23585369:95074622:104745350

also note that you might rather want to use

DERIVE instead of GAUGE with a value range from 0 to the maximum
rate.

This will turn counter restes into Unknown automatically and will
not do any 32bit or 64bit counter wrap magic.

cheers
tobi

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900