Re: ANN: pcp-machine - a Lua query engine for PCP

[fche@xxxxxxxxxx (Frank Ch. Eigler)]

Hi, Ryan -

> I've spent the last week writing a programmable query engine for
> PCP. It's a bit like pmie, and a bit like the python APIs but focuses
> on simplicity of the API and specifically around querying metrics.

Would it be fair to say that the core portion is more like a lua
binding to the PMAPI, and the pmie portion is the hard-coded lua
conditionals in the samples/*.lua files?

As of 3.11, the former portion can be expressed as pretty compact
python code now.  So for example, the samples/nprocs.lua could
look thusly in pcp 3.11 python:


from pcp import pmapi
fg = pmapi.fetchgroup() # defaults to -h local:
nprocs = fg.extend_item("kernel.all.nprocs")
fg.fetch()
if nprocs() > 100:
   print("Processes are too high! %d" % nprocs())


- FChE