[Hawkular-dev] [Metrics] Unified query support brainstorming

[Thomas Segismont]

Many thanks to those who replied already - or will do :)

I'm off next week but keep the discussions going. In the following weeks 
I'll write up the ideas in a doc and schedule a meeting to present it.

Le 22/07/2015 16:13, Thomas Segismont a écrit :
> Hi everyone,
>
> Right now, when you query data in Metrics, you can, given a time range:
> - get raw data
> - get raw data having some tags
> - get a "bucketed" view of raw data with on-the fly aggregates
> - get periods for which a condition on the value holds true
>
> But you can't mix these capabilities.
>
> For example, you can't ask for periods where the avg of a gauge,
> computed over 1 min buckets, is greater than a threshold.
>
> It's not possible either to express AND/OR in tags or condition queries.
>
> Searching by tags is useful, but users have to tag data manually (unless
> the collector adds some predefined tags). It would be useful to be able
> to operate on data coming from different metrics having similar names:
> like tell me the average cpu usage over all my web hosts, provided the
> metrics are _webhost*.cpu.usage_
>
> When aggregating data, users should able to provide the name of the
> function, be it a builtin or user defined function.
>
> Last but not least, when rollups will be implemented, users should
> probably not have to care about where the data is stored,if they ask for
> the 1-month average of a metric over the past year, or the 30-seconds
> average over the past five minutes (think about the UI zooming graphs).
>
> The examples are not completely fabricated, it's feedback I got while
> presenting Hawkular. I understood Stefan heard similar comments during
> Summit.
>
> I'm starting this thread to gather inputs so that we can build a
> powerful, unified query API. Feel free to provide more use cases and/or
> ideas for implementation.
>
> Thanks!
> Thomas
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