--- Jason Faulkner <[EMAIL PROTECTED]> wrote: > Martin Knoblauch wrote: > > --- Jason Faulkner <[EMAIL PROTECTED]> wrote: > > > > > >> I'm curious about how "possible" or difficult it would be to make > >> gmetad > >> backwards compatible -- i.e. where I could leave my 2.5.x gmond > >> installations alone, and install 3.x gmetad on my main server (and > be > >> > >> able to collect stats despite having a heterogeneous 2.5.x and 3.x > > >> environment). This would allow me to (hopefully) live-migrate my > >> ganglia > >> install up to the new version. > >> > >> -- > >> Jason Faulkner > >> Systems Manager > >> Broadwick Corporation > >> (919) 459-2509 > >> > >> > > Hi Jason, > > > > although we bumped the major number in the 2.5.x -> 3.0 > transition, we > > took care to not introduce incompatible changes to the core metrics > > framework. In short, I see no reason why a 3.0.4 gmetad should not > be > > able to query 2.5.x gmond data. > > > > It should even be possible to have a 3.0.4 gmond listen to older > > gmonds. Of course, you are limited to multicast until you have > replaced > > all gmonds. > > > Jan 3 23:12:07 intranet1 ./gmetad[25006]: RRD_update > (/var/lib/ganglia/rrds/Dev Login > Servers/__SummaryInfo__/part_max_used.rrd): illegal attempt to update > > using time 1167883927 when last update time is 1167883927 (minimum > one > second step) > > I've been receiving repeated errors like this attempting to use a > 3.0.x > gmetad with a 2.5.7 gmond. The times are synced perfectly to a local > NTP > server, so I'm sure that's not the issue. >
Not an NTP issue, you are most likely right. The message tells that the current timestamp for the metrics in question did not change from the previous invocation of the call. Does this only happen on part_max_used, or are other metrics showing up as well? part_max_used is likely changeing very slow, this might be an indicator. also interesting to note that in your example the metrics is not a host, but a summary metrics. Does it prevent useful operation of the 3.0.x gmetad together with 2.5.7 gmonds? Or is it just annoying? Cheers Martin ------------------------------------------------------ Martin Knoblauch email: k n o b i AT knobisoft DOT de www: http://www.knobisoft.de
