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pmnsdel(1)

NAME

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

SYNOPSIS

   $PCP_BINADM_DIR/pmnsdel [-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 Name Space
   (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(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.

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(5).

SEE ALSO

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



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