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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).