изменять значения показателей производительности (modify values of performance metrics)
Имя (Name)
pmStore - modify values of performance metrics
Синопсис C (C Synopsis)
#include <pcp/pmapi.h>
int pmStore(const pmResult *result);
cc ... -lpcp
Описание (Description)
In some special cases it may be helpful to modify the current
values of performance metrics, e.g. to reset a counter to zero,
or to modify a ``metric'' which is a control variable for some
agent collecting performance metrics.
The routine pmStore is a lightweight inverse of pmFetch(3).
The caller must build the pmResult data structure (of course,
this could have been returned from an earlier pmFetch(3) call)
and then call pmStore.
It is an error to pass a request to pmStore in which the numval
field within any of the pmValueSet structure has a value less
than one.
The current Performance Metrics Application Programming Interface
(PMAPI) context must be one with a host as the source of metrics,
and the current value of the nominated metrics will be changed,
i.e. pmStore cannot be used to make retrospective changes to
information in either the archive logs, or in the recent past for
real-time sources of metrics.
The return code from pmStore is zero for success.
Диагностика (Diagnostic)
PM_ERR_GENERIC
At least one of the modifications was rejected. No other
status is available from below the PMAPI (this is the
lightweight part of the functionality!). In cases where
the outcome of pmStore for individual metrics is
important, the caller should make one call to pmStore for
each metric. On the other hand, a bulk modification can be
performed in a single pmStore call for situations in which
the outcome is not critical.
PM_ERR_NOTHOST
The current PMAPI context is an archive rather than a
host, or it is a host that is not set to the current time,
i.e. has been ``rewound'' to the recent past using
pmSetMode(3).
PM_ERR_TOOSMALL
The number of metrics specified in result is less than
one.
PM_ERR_VALUE
One or more of the pmValueSets in result has a numval
field with a value less than one.
Смотри также (See also)
PMAPI(3), pmFetch(3) and pmSetMode(3).
