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 namespace
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(4).
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. pmnsdel will then attempt to compile
the resultant namespace using pmnscomp(1) - if this fails for any
reason, 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 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 configuration
file, as described in pcp.conf(4).
SEE ALSO
pmnsadd(1), pmnscomp(1), pmnsmerge(1), pcp.conf(4), pcp.env(4) and
pmns(4).