On Thu, Jan 30 2014, Adrian Turjak wrote: > example: > 10min pipeline interval, a reset/shutdown happens 7 mins after the last > poll. The data for those 7 mins is gone. Even terminating a VM will mean we > lose the data in that last interval.
If the shutdown is down properly, the nova notifier plugin that we provide in Ceilometer do a lost polling of the instance before shutting it down, so you don't lose anything. OTOH if the compute node crashes, that's true that you lose 7 mins of data. I guess you also have bigger problem. > On the other hand, would it be possible to setup a notification based metric > that updates cumulative metrics, or triggers a poll right before the > reset/shutdown/suspension/terminate, so we have an entry right before it > resets and don't lose any data? This would pretty much solve the issue, and > as long as it is documented that the cumulative metrics reset, this would > solve most problems. Yes, we have the nova notifier plugin doing exactly that. :) -- Julien Danjou # Free Software hacker # independent consultant # http://julien.danjou.info
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