определить дескриптор для пары метрика-экземпляр (define a handle for a metric-instance pair)
Имя (Name)
pmiGetHandle - define a handle for a metric-instance pair
Синопсис C (C Synopsis)
#include <pcp/pmapi.h>
#include <pcp/import.h>
int pmiGetHandle(const char *name, const char *instance);
cc ... -lpcp_import -lpcp
Синопсис PERL (PERL synopsis)
use PCP::LogImport;
$handle = pmiGetHandle($name, $instance);
Описание (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).
Диагностика (Diagnostic)
On failure pmiGetHandle returns a negative value that can be
turned into an error message by calling pmiErrStr(3).
Смотри также (See also)
LOGIMPORT(3), pmiAddInstance(3), pmiAddMetric(3), pmiErrStr(3)
and pmiPutValueHandle(3).
