Re: [pcp] PCP libvirt PMDA

[Nathan Scott <nathans@xxxxxxxxxx>]

----- Original Message -----
> On 25/07/16 23:54, Martins Innus wrote:
> > ... We havenât started logging any nodes with this pmda, just
> > starting to figure out what is useful, but whatever the final choice
> > is, it would be ideal if pmlogger would automatically pickup any new
> > devices.  So if the pmlogger config is libvirt.* , and the VMs
> > running at pmlogger start time each have only one network device and
> > one blockdevice, if a VM is then started with multiple of each, those
> > start getting logged as well.
> 
> I haven't been following this thread in detail, so this comment may not
> be relevant, but ...
> 

(it's very relevant)

> If the PMDA is using dynamic metric names (not dynamic instances) for
> this data, then pmlogger will only log the metric _names_ that exist at
> the time pmlogger starts ... instances can come and go, but the PMNS
> will not be re-explored by pmlogger once it has parsed the configuration
> file.

Right.  Similar to the pmie problem I mentioned originally, where client
handling of instances is inherently far more dynamic than metrics.

cheers.

--
Nathan