NAME
pmFetchArchive - get performance metrics directly from an archive log
C SYNOPSIS
#include <pcp/pmapi.h>
int pmFetchArchive(pmResult **result)
cc ... -lpcp
DESCRIPTION
pmFetchArchive is a variant of pmFetch(3) that may only be used when
the current Performance Metrics Application Programming Interface
(PMAPI) context is associated with an archive log.
The result is instantiated with all of the metrics (and instances) from
the next archive record, consequently there is no notion of a list of
desired metrics, and the instance profile of the PMAPI context is
ignored.
It is expected that pmFetchArchive would be used to create utilities
that scan archive logs, while the more common access to the archives
would be via the pmFetch(3) interface.
To skip records within the archive log, use pmSetMode(3) to change the
collection time within the current PMAPI context, then call
pmFetchArchive.
Note that the result returned by pmFetchArchive is dynamically
allocated, and must be released using pmFreeResult(3), not free(3C).
See pmFetch(3) and pmFreeResult(3) for further details.
pmFetchArchive returns zero on success.
SEE ALSO
PMAPI(3), pmFetch(3), pmFreeResult(3), pmNewContext(3), pmSetMode(3)
and pmTrimNameSpace(3).
DIAGNOSTICS
PM_ERR_NOTARCHIVE
the current PMAPI context is not associated with an archive log