[Hawkular-dev] Tag concept in metrics and alerts

[Gary Brown]

Hi John

Thanks for the clarification - that fits with how I need to use metrics. So for example, I may have btm_id=<some unique id for the transaction instance>, and possibly service_type=<service associated with the metric>, operation=<op name> - so assume they would all be ok?

Regards
Gary

----- Original Message -----
> Originally tags were implemented just as a label, not a key/value pair. I saw
> that a number of other time series dbs use key/value pairs and decided to
> make the change. It can also produce more efficient queries. For example,
> filtering against N labels would require querying N partitions (in the
> original schema). Querying against one tag name with N different values
> however would only require querying 1 partition.
> 
> > On Jun 24, 2015, at 6:25 AM, Michael Burman <miburman at redhat.com> wrote:
> > 
> > Hi,
> > 
> > I don't agree with changing the terms. Many of metrics competing products
> > (such as InfluxDB / OpenTSDB) use the same terminology, so it is easier
> > for customers to understand the differences and similarities between
> > products. Using different terminology was one of the difficulties in RHQ
> > (like noted in the F2F meeting) and I don't think we should repeat the
> > same mistake.
> > 
> >  - Micke
> > 
> > ----- Original Message -----
> > From: "Gary Brown" <gbrown at redhat.com>
> > To: "Discussions around Hawkular development"
> > <hawkular-dev at lists.jboss.org>
> > Sent: Wednesday, June 24, 2015 11:45:56 AM
> > Subject: [Hawkular-dev] Tag concept in metrics and alerts
> > 
> > Hi
> > 
> > Both metrics and alerts use the term 'tag' - however metrics use a
> > name/value pair for a tag, and alerts uses it as a label. Wondering
> > whether we need consistency?
> > 
> > When I hear the term tag, I usually envisage a label - e.g. as in git. So
> > wondering whether it would be clearer for metrics to rename tags to
> > properties?
> > 
> > Possibly metrics needs the concept of a tag/label as well?
> > 
> > Regards
> > Gary
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> 
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