Mechanism for edge detection in series

What if you have a series that is reporting the state of a service at intervals?
Something like
timestamp myfield
1465577250 blabla1
1465577370 blabla2
1465577490 blabla2
1465577610 blabla2
1465577730 blabla2
1465577850 blabla3
1465577970 blabla3
1465578090 blabla4
1465578210 blabla4

We would like to be alerted whenever myfield value changes.
timestamp myfield
1465577250 blabla1
1465577370 blabla2
1465577850 blabla3
1465578090 blabla4
*that myfield is string

See https://github.com/influxdata/kapacitor/issues/643

1 Like

thank you for your attention. but i dont find any answer about string field in there. i think we can add feature in derivative to compare any fiend such as string by send compare func to it.