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Diffstat (limited to 'man/man3/pmistart.3')
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diff --git a/man/man3/pmistart.3 b/man/man3/pmistart.3 new file mode 100644 index 0000000..fcb66fb --- /dev/null +++ b/man/man3/pmistart.3 @@ -0,0 +1,139 @@ +'\"macro stdmacro +.\" +.\" Copyright (c) 2010 Ken McDonell. All Rights Reserved. +.\" +.\" This program is free software; you can redistribute it and/or modify it +.\" under the terms of the GNU General Public License as published by the +.\" Free Software Foundation; either version 2 of the License, or (at your +.\" option) any later version. +.\" +.\" This program is distributed in the hope that it will be useful, but +.\" WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +.\" or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +.\" for more details. +.\" +.\" +.TH PMISTART 3 "" "Performance Co-Pilot" +.SH NAME +\f3pmiStart\f1 \- establish a new LOGIMPORT context +.SH "C SYNOPSIS" +.ft 3 +#include <pcp/pmapi.h> +.br +#include <pcp/impl.h> +.br +#include <pcp/import.h> +.sp +int pmiStart(const char *\fIarchive\fP, int \fIinherit\fP); +.sp +cc ... \-lpcp_import \-lpcp +.ft 1 +.SH "Perl SYNOPSIS" +.ft 3 +use PCP::LogImport; +.sp +pmiStart($\fIarchive\fP, $\fIinherit\fP); +.ft 1 +.SH DESCRIPTION +As part of the Performance Co-Pilot Log Import API (see +.BR LOGIMPORT (3)), +.B pmiStart +creates a new context. Each context maintains the following +state and metadata: +.IP \(bu 3n +The base name (\c +.IR archive ) +for the physical files +that constitute the output PCP archive. +.IP \(bu 3n +The source hostname for the data that will be written to the +PCP archive. Defaults to the hostname of the localhost, but can be set using +.BR pmiSetHostname (3). +.IP \(bu 3n +The source timezone for the +PCP archive. Defaults to the timezone of the localhost, but can be set using +.BR pmiSetTimezone (3). +.IP \(bu 3n +Metrics and instance domains, as defined by +.BR pmiAddMetric (3). +.IP \(bu 3n +Instances for each instance domain, as defined by +.BR pmiAddInstance (3). +.IP \(bu 3n +Handles as defined by +.BR pmiGetHandle (3). +Each handle is a metric-instance pair, and each metric-instance pair +may have an associated value in each record written to the output +PCP archive. +.IP \(bu 3n +An optional set of data values for one or more metric-instance pairs +(ready for the next record to be written +to the output PCP archive) as defined +by calls to +.BR pmPutValue (3) +or +.BR pmPutValuehandle (3). +.PP +If +.I inherit +is true, then the new context will inherit any and all +metadata (metrics, instance domains, instances and handles) from the current +context, otherwise the new context is created with no metadata. +The basename for the output PCP archive, the source hostname, the +source timezone and any data values from the current context are +.B not +inherited. +If this is the first call to +.B pmiStart +the metadata will be empty +independent of the value of +.IR inherit . +.PP +Since no physical files for the output PCP archive +will be created until the first call to +.BR pmiWrite (3) +or +.BR pmiPutRecord(3), +.I archive +could be NULL to create a +convenience context that is populated with metadata to be +inherited by subsequent contexts. +.PP +The return value is a context identifier that +could be used in a subsequent call to +.BR pmUseContext (3) +and the +new context becomes the current context which +persists for all subsequent calls up to either another +.B pmiStart +call or a call to +.BR pmiUseContext (3) +or a call to +.BR pmiEnd (3). +.SH DIAGNOSTICS +It is an error if the physical files +\fIarchive\fR.\fB0\fR and/or +\fIarchive\fR.\fBindex\fR and/or +\fIarchive\fR.\fBmeta\fR already exist, but this is not discovered +until the first attempt is made to output some data by calling +.BR pmiWrite (3) +or +.BR pmiPutRecord(3), +so +.B pmiStart +always returns a positive context identifier. +.SH SEE ALSO +.BR LOGIMPORT (3), +.BR pmiAddInstance (3), +.BR pmiAddMetric (3), +.BR pmiEnd (3), +.BR pmiErrStr (3), +.BR pmiGetHandle (3), +.BR pmiPutResult (3), +.BR pmiPutValue (3), +.BR pmiPutValueHandle (3), +.BR pmiSetHostname (3), +.BR pmiSetTimezone (3), +.BR pmiUseContext (3) +and +.BR pmiWrite (3). |