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   pmloadnamespace    ( 3 )

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).