Ford, Andy wrote: > > How about keeping another rrd file and just put a zero (or something) >> into it whenever you put anything in the ping-time rrd ? That way, if >> your collector is down, this new rrd will have nan as well as the >> ping time graph - so you can simply draw a red block if the monitor >> rrd is nan, otherwise simply plot the ping time and have a gap if the >> remote host is down. This monitor rrd would need to have exactly the >> same sample periods etc as the ping-time one, and be updated by the >> same script at the same time (or as near as is possible).
>Ah Hah! Knew someone had to have thought this out for me. Thanks Simon. >Now the question is, can I use just one "collector-down" rrd for 100 >different collectors? >I.e., if I update an rrd designed for 1 update a minute 100 times a >minute, will it be OK? I don't see why you can't use one 'flag file' for multiple real data files - it's a really a case of "am I confident that this flag file will show the collector as being down when the real data says 'nan'" ? Simon -- Unsubscribe mailto:[EMAIL PROTECTED] Help mailto:[EMAIL PROTECTED] Archive http://lists.ee.ethz.ch/rrd-users WebAdmin http://lists.ee.ethz.ch/lsg2.cgi