----- Original Message -----
> The suggestion to split the proc metrics out of the linux pmda has
> raised the question (again) of controlled rewriting of PCP archives to
> handle changes in metadata over time.
> pmlogextract cannot merge archives where the metadata is different for
> the same metric across the input archives, e.g. type changes from
> to 64-bit with some PMDA upgrade, units change, or the name of a
> changes or the PMID of a metric changes (which is the problem with
> splitting the proc metrics out of the linux PMDA).
> The proposed solution is to create pmlogrewrite and then allow
> pmlogextract to preprocess all input archives with pmlogwrite before
> Of course pmlogrewrite could be used stand alone as well.
> The changes to be made by pmlogrewrite are defined in a control file
> that would be something like the attached strawman syntax proposal.
> I'd be interested in comments/feedback. For example, I'm not convinced
> of the usefulness of the "new" instance specification.
Looks good. Might want to add renaming a metric (name1 -> name2).
Yeah, not sure I've ever had a need for adding a "new" instance.
Could probably replace pmloglabel with this too (make a wrapper?).