pmnsdel(1) [centos man page]

PMNSDEL(1)						      General Commands Manual							PMNSDEL(1)

NAME

       pmnsdel - delete a subtree of names from the Performance Co-Pilot PMNS

SYNOPSIS

       $PCP_BINADM_DIR/pmnsdel [-d] [-n namespace] metricpath [ ... ]

DESCRIPTION

       pmnsdel	removes  subtrees  of  names  from  a Performance Metrics Name Space (PMNS), as used by the components of the Performance Co-Pilot
       (PCP).

       Normally pmnsdel operates on the default Performance Metrics Namespace (PMNS), however if the -n option is specified an alternative  names-
       pace is used from the file namespace.

       The  default  PMNS is found in the file $PCP_VAR_DIR/pmns/root unless the environment variable PMNS_DEFAULT is set, in which case the value
       is assumed to be the pathname to the file containing the default PMNS.

       The metric names to be deleted are all those for which one of the metricpath arguments is a prefix in the PMNS, see pmns(5).

       All of the files defining the PMNS must be located within the directory that contains the root of the PMNS, and	this  would  typically	be
       $PCP_VAR_DIR/pmns for the default PMNS, and this would typically imply running pmnsdel as root.

       Provided  some  initial	integrity  checks are satisfied, pmnsdel will update the necessary PMNS files.	Should an error be encountered the
       original namespace is restored.	Note that any PMNS files that are no longer referenced by the modified namespace will not be removed, even
       though their contents are not part of the new namespace.

       The  -d option allows the resultant PMNS to optionally contain duplicate PMIDs with different names in the PMNS.  By default this condition
       is considered an error.

CAVEAT

       Once the writing of the new namespace file has begun, the signals SIGINT, SIGHUP and SIGTERM will be ignored to protect	the  integrity	of
       the new files.

FILES

       $PCP_VAR_DIR/pmns/root	the default PMNS, when then environment variable PMNS_DEFAULT is unset

PCP ENVIRONMENT

       Environment  variables  with  the prefix PCP_ are used to parameterize the file and directory names used by PCP.  On each installation, the
       file /etc/pcp.conf contains the local values for these variables.  The $PCP_CONF variable may be used to specify an alternative	configura-
       tion file, as described in pcp.conf(5).

SEE ALSO

       pmnsadd(1), pmnsmerge(1), pcp.conf(5), pcp.env(5) and pmns(5).

Performance Co-Pilot							PCP								PMNSDEL(1)

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)

Linux and UNIX Man Pages

pmnsdel(1) [centos man page]

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