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       pmLoadNameSpace - load a local PMNS for an application


       #include <pcp/pmapi.h>

       int pmLoadNameSpace(const char *filename)

       cc ... -lpcp


       If  the  application  wants  to force using a local Performance Metrics
       Name Space (PMNS) instead of a distributed PMNS then it must  load  the
       PMNS   using   pmLoadNameSpace   or  pmLoadASCIINameSpace(3).   If  the
       application is to use a distributed PMNS, then it  should  NOT  make  a
       call to load the PMNS explicitly.

       The   filename   argument   designates   the  PMNS  of  interest.   For
       applications  not  requiring  a  tailored  PMNS,  the   special   value
       PM_NS_DEFAULT may be used for filename, to force the default local PMNS
       to be loaded.

       The default local 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
       local PMNS.

       Externally  a  PMNS may be stored in either an ASCII format or a binary
       format.  The utility pmnscomp(1) is used to create  the  binary  format
       from the ASCII format described in pmns(4).

       If  the binary format is used, no checking is performed for aliasing in
       which  multiple  names  in  the  PMNS  are  associated  with  a  single
       Performance  Metrics  Identifier  (PMID).  If the ASCII format is to be
       used, duplicate PMIDs are not allowed, although pmLoadASCIINameSpace(3)
       provides  an  alternative  interface with user-defined control over the
       processing of duplicate PMIDs in an ASCII format PMNS.

       pmLoadNameSpace attempts to load  the  PMNS  by  trying  the  following
       combinations in order,

       1. Binary format from the file filename.bin

       2. Binary format from the file filename

       3. ASCII format from the file filename

pmLoadNameSpace returns zero on success.


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


       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).  Values for these variables  may  be
       obtained programatically using the pmGetConfig(3) function.


       pmnscomp(1),    PMAPI(3),    pmGetConfig(3),   pmLoadASCIINameSpace(3),
       pmTrimNameSpace(3), pcp.conf(4), pcp.env(4) and pmns(4).


       Syntax and other errors in the parsing of  the  PMNS  are  reported  on
       stderr with a message of the form ‘‘Error Parsing ASCII PMNS: ...’’.


              It  is  an  error to try and load more than one PMNS, or to call
              either pmLoadNameSpace and/or pmLoadASCIINameSpace(3) more  than


              Syntax error in an ASCII format PMNS.