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 Met
rics Name Space (PMNS), as used by the components of the
Performance Co-Pilot (PCP).
Normally pmnsdel operates on the default Performance Met
rics Namespace (PMNS), however if the -n option is speci
fied an alternative namespace is used from the file names
pace.
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 con
tain 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 pro
tect the integrity of the new files.
FILES
$PCP_VAR_DIR/pmns/root the default PMNS, when then
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).
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