When you do correlation, you'll probably need to have a time window for the events you want to match. It's likely that the different agents/commands that generate the data don't run instantaneously. There might be several seconds or even minutes depending on the time synchronisation between your hosts etc...
On Thu, Jan 17, 2013 at 8:35 AM, Conrad Wood <[email protected]> wrote: > On Tue, 2013-01-15 at 08:28 -0800, Craig Cook wrote: > > > Graphite/Carbon - missing data correlation > > > > > > What do you mean by "missing data correlation"? > > > > > > Something like, "show me CPU usage across my web cluster?" > > > > > > Or, "See that CPU spike on Server A, is it related to the slow > > response of App B?" > > > Robert Au mentioned in his post, opentsdb, which I think is a good > candidate. > > The questions usually hover around maximum and average latency in > different components. > With correlation I mean the ability to have data from different "tables" > or "Databases" considered to answer a question. > For example, > Q1: what was the maximum number of interrupts/second on CPU #15 during > the past 24h. > Q2: what was the maximum number of interrupts/second on Server X (which > has CPU 0 to 63) during the past 24h. > Q3: what was the maximum number of interrupts/second on any Server in > Datacenter X during the past 24h. > And so on.... > > This kind of data I want for network/storage/cpu/ram usage and what have > you not. > > It is realistic to assume there will be correlation of different types, > e.g. how do IRQ/s correlate with IOPs (if at all ;) ) > > I hope your question is answered, and again thanks everyone for the > valuable suggestions! > > Conrad > > > > > > _______________________________________________ > Tech mailing list > [email protected] > https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech > This list provided by the League of Professional System Administrators > http://lopsa.org/ >
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