Re: pcp grafana and graphite - How to convert pcp metric values into percent

["Frank Ch. Eigler" <fche@xxxxxxxxxx>]

Hi -

> So what I understand that rate conversion does not work for PMWEBAPI client
> but works fine for pmval and pmwebd graphite extension.

Exactly, though I wouldn't say "works" or "does not work".  Rate
conversion was not intended to be done by the PMWEBAPI layer: it's a
very shallow mapping of the C PMAPI.

> I tested it and that is exactly what I am seeing. pmval is doing rate
> conversion, but curl is returning raw values. 

OK.

> That means our UI client has to do rate conversion when using
> PMWEBAPI call.

... or else we can extend PMWEBAPI to have a rate-conversion option.
What that needs is a history component - previous records from which
to compute deltas.  PMWEBAPI's non-live (archive) support is pretty
weak too; we could improve both these aspects if you need them.


- FChE