RRDtool if one value is skipped in update the next one is missing also -


i have created rrd db, should receive update every hour , display values of received orders last 24 hours:

rrdtool create db.rrd --step 3600 --start 1381230000 ds:measurment:gauge:4800:0:u     rra:average:0.5:1:24

everything working ok, except fact when miss 1 value in update 2 of them missing database:

so let have:

.... 1381240800:1203  1381244400:1302  1381248000:1132   1381251600:988 ....

but if second update wouldn't received (1381244400:1302), third (1381248000:1132) missing dispite fact arrived.

can tell me why happening?

thank you

the problem if previous update missed, interval between last , current update larger 4800 seconds specified in ds definition. therefore rrdtool treat data between last , current update unknown.

in rrdtool 1.4.8 have introduced special case gauge ds updates previous update more mrhb in past. in case rrdtool treat data supplied valid now-mrhb until now.


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