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pmigethandle(3)

NAME

   pmiGetHandle - define a handle for a metric-instance pair

C SYNOPSIS

   #include <pcp/pmapi.h>
   #include <pcp/impl.h>
   #include <pcp/import.h>

   int pmiGetHandle(const char *name, const char *instance);

   cc ... -lpcp_import -lpcp

Perl SYNOPSIS

   use PCP::LogImport;

   $handle = pmiGetHandle($name, $instance);

DESCRIPTION

   As  part of the Performance Co-Pilot Log Import API (see LOGIMPORT(3)),
   pmiGetHandle creates a handle for a given  metric  and  instance.   The
   handle  is  returned as the value from the pmiGetHandle call and can be
   used in subsequent calls to pmiPutValueHandle(3).

   The metric's name should  match  one  defined  earlier  in  a  call  to
   pmiAddMetric(3).

   For  singular  metrics  (those  defined  with  an  instance  domain  of
   PM_INDOM_NULL), the  instance  should  be  NULL  or  an  empty  string,
   otherwise instance should match the name of an instance defined earlier
   in a call to pmiAddInstance(3) for the metric's instance domain.

   When combined with pmiPutValueHandle(3), the use of handles  provide  a
   performance  improvement  over the alternative lookup for a metric name
   and an  instance  name  for  each  data  value  that  is  required  for
   pmiPutValue(3).

DIAGNOSTICS

   On  failure  pmiGetHandle  returns  a negative value that can be turned
   into an error message by calling pmiErrStr(3).

SEE ALSO

   LOGIMPORT(3),  pmiAddInstance(3),  pmiAddMetric(3),  pmiErrStr(3)   and
   pmiPutValueHandle(3).

                         Performance Co-Pilot              PMIGETHANDLE3()



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