6:51 a.m.
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(a)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(a)redhat.com>
> To: "Discussions around Hawkular development"
> <hawkular-dev(a)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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