Martin T wrote: >I have a RRD database with a step of 60s and heartbeat of 120s. This >database holds the GAUGE value(HDD temperature of my server). There is >a script which asks temperature value from the server after every 60s >and updates the database file. Finally I have a "rrdtool graph" >script, which draws the graph. Problem is that in case the server is >not reachable to the machine where rrdtool runs and UNKNOWN value is >written to the RRD database, there is no blank gap on the graph. >Instead it looks like the temperature value is assumed to be "0". What >might cause this?
How are you graphing (ie what is the graph command) ? Are you sure it's showing zero and not a gap ? Are you sure you are writing unknowns and not zeroes to the database OR are not writing anything ? With the values given, after 2 minutes you should see unknown in the database PROVIDED you are either not writing data, or are writing "unknown" as the value. -- Simon Hobson Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed author Gladys Hobson. Novels - poetry - short stories - ideal as Christmas stocking fillers. Some available as e-books. _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
