pmlookupname(3) [centos man page]
PMLOOKUPNAME(3) Library Functions Manual PMLOOKUPNAME(3) NAME
pmLookupName - translate performance metric names into PMIDs C SYNOPSIS
#include <pcp/pmapi.h> int pmLookupName(int numpmid, char **namelist, pmID *pmidlist); cc ... -lpcp DESCRIPTION
Given a list in namelist containing numpmid full pathnames for performance metrics from a Performance Metrics Name Space (PMNS), pmLookup- Name returns the list of associated Performance Metric Identifiers (PMIDs) via pmidlist. The result from pmLookupName will be the number of names translated in the absence of errors, else an error code less than zero. When errors are encountered, the corresponding value in pmidlist will be PM_ID_NULL. Note that the error protocol guarantees there is a 1:1 relationship between the elements of namelist and pmidlist, hence both lists contain exactly numpmid elements. For this reason, the caller is expected to have pre-allocated a suitably sized array for pmidlist. SEE ALSO
PMAPI(3), pmGetChildren(3), pmGetChildrenStatus(3), pmGetConfig(3), pmLoadNameSpace(3), pmNameID(3), pmNewContext(3), pcp.conf(5) and pcp.env(5). DIAGNOSTICS
PM_ERR_TOOSMALL numpmid must be at least 1 PM_ERR_NOPMNS Failed to access a PMNS for operation. Note that if the application hasn't a priori called pmLoadNameSpace(3) and wants to use the distributed PMNS, then a call to pmLookupName must be made after the creation of a context (see pmNewContext(3)). PM_ERR_NAME One or more of the elements of namelist does not correspond to a valid metric name in the PMNS. PM_ERR_NONLEAF A name referred to a node in the PMNS but it was not a leaf node. PM_ERR_* Other diagnostics are for protocol failures when accessing the distributed PMNS. Performance Co-Pilot PCP PMLOOKUPNAME(3)
Check Out this Related Man Page
PMTRIMNAMESPACE(3) Library Functions Manual PMTRIMNAMESPACE(3) NAME
pmTrimNameSpace - prune a performance metrics name space C SYNOPSIS
#include <pcp/pmapi.h> int pmTrimNameSpace(void); cc ... -lpcp DESCRIPTION
If the current Performance Metrics Application Programming Interface (PMAPI) context corresponds to a version 1 archive log of Performance Co-Pilot (PCP) performance metrics (as collected by pmlogger(1) -V1), then the currently loaded Performance Metrics Name Space (PMNS), is trimmed to exclude metrics for which no description can be found in the archive. The PMNS is further trimmed to remove empty subtrees that do not contain any performance metric. Since PCP archives usually contain some subset of all metrics named in the default PMNS, pmTrimNameSpace effectively trims the applica- tion's PMNS to contain only the names of the metrics in the archive. Since PCP 2.0, pmTrimNameSpace is only needed for dealing with version 1 archives. Version 2 archives actually store the "trimmed" PMNS. Prior to any trimming, the PMNS is restored to the state as of the completion of the last pmLoadASCIINameSpace(3) or pmLoadNameSpace(3), so the effects of consecutive calls to pmTrimNameSpace with archive contexts are not additive. If the current PMAPI context corresponds to a host and a pmLoadASCIINameSpace(3) or pmLoadNameSpace(3) call was made, then the PMNS reverts to all names loaded into the PMNS at the completion of the last pmLoadASCIINameSpace(3) or pmLoadNameSpace(3), i.e. any trimming is undone. On success, pmTrimNameSpace returns zero. SEE ALSO
pmlogger(1), PMAPI(3), pmLoadASCIINameSpace(3), pmLoadNameSpace(3), pmNewContext(3) and pmns(5). DIAGNOSTICS
PM_ERR_NOPMNS you must have loaded a PMNS using pmLoadASCIINameSpace(3) or pmLoadNameSpace(3) before calling pmTrimNameSpace PM_ERR_NOCONTEXT the current PMAPI context is invalid Performance Co-Pilot PCP PMTRIMNAMESPACE(3)