загрузить локальную PMNS для приложения (load a local PMNS for an application)
Имя (Name)
pmLoadNameSpace - load a local PMNS for an application
Синопсис C (C Synopsis)
#include <pcp/pmapi.h>
int pmLoadNameSpace(const char *filename);
cc ... -lpcp
Описание (Description)
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.
Most applications using a Performance Metrics Application
Programming Interface (PMAPI) context (of any type, so
PM_CONTEXT_HOST or PM_CONTEXT_ARCHIVE or PM_CONTEXT_LOCAL) should
not need to call pmLoadNameSpace.
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 is stored in an ASCII format as described in
PMNS(5). However, note that pmLoadNameSpace assumes filename
does not contain any C-style comments, pre-processor directives
or macros; if this is not the case, pmLoadASCIINameSpace(3)
should be used instead.
As of Version 3.10.3 of PCP, by default, multiple names in the
PMNS are allowed to be associated with a single Performance
Metrics Identifier (PMID) and this is unconditionally allowed by
pmLoadNameSpace. pmLoadASCIINameSpace(3) provides an alternative
interface with user-defined control over the handling of
duplicate names for the same PMID in the PMNS.
pmLoadNameSpace returns zero on success.
Диагностика (Diagnostic)
Syntax and other errors in the parsing of the PMNS are reported
on stderr with a message of the form ``Error Parsing ASCII PMNS:
...''.
PM_ERR_DUPPMNS
It is an error to try and load more than one PMNS, or to
call either pmLoadNameSpace and/or pmLoadASCIINameSpace(3)
more than once.
PM_ERR_PMNS
Syntax error in the PMNS file.
Файлы (Files)
$PCP_VAR_DIR/pmns/root the default local PMNS, when the
environment variable PMNS_DEFAULT is
unset
Окружение PCP (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). Values for these variables may be obtained
programmatically using the pmGetConfig(3) function.
Смотри также (See also)
PMAPI(3), pmGetConfig(3), pmLoadASCIINameSpace(3),
pmTrimNameSpace(3), pcp.conf(5), pcp.env(5) and PMNS(5).
