Re: [pcp] Multi-archive Contexts Getting Close to Merge

[Nathan Scott <nathans@xxxxxxxxxx>]

----- Original Message -----
> [...]
> > *   Whether to restrict pmdumplog(1) and pmlogcheck(1) to single
> > archive contexts.
> 
> I'd be happy to see these restricted in the first instance, and then
> revisited once we've shaken the core functionality down.

FWIW, one possible approach for implementing this would be to use the
__pmSetInternalState interface.  If we tweak the semantics argument to
allow a bitfield, we could perhaps add a ...

#define PM_STATE_APPL   0x0
#define PM_STATE_PMCS   0x1
#define PM_STATE_ONELOG 0x2

... without any API/ABI disturbance.  Obviously, that flag would need
to be set by tools opting-in to that mode, and before they create any
contexts.  I'm slightly surprised that pmdumplog and pmlogcheck aren't
setting PM_STATE_PMCS already, since they're not derived/anon metrics
users.  (is that an oversight Ken?  pmlogreduce & pmlogextract use it)

cheers.

--
Nathan