pcp-import-sheet2pcp 3.5.11 / usr / bin / sheet2pcp

#!/usr/bin/perl
#
# 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.
#

use strict;
use warnings;

use XML::TokeParser;
use Spreadsheet::Read;
use Getopt::Std;
use Date::Parse;
use Date::Format;
use PCP::LogImport;

my $skip_rows = 0;	# N from <sheet heading="N">
my $in_metric = 0;	# XML parser context state ... in <metric> element
my $in_data = 0;	# XML parser context state ... in <data> element
my $idx = -1;		# index into columns of spreadsheet
my $stamp_idx = -1;	# column containing the datetime info
my %indom_map = ();	# key=metricname value=indom
my %inst_map = ();	# key=indom value=last_inst_assigned, and
			# key=indom.instance value=inst
my @handle = ();	# pmi* handles, one per metric-instance pair
my $sheet;

my $zone = "UTC";	# default timezone
my $label_zone;
my $datefmt = "DMY";	# default order of date fields
my %options;		# for command line arguments

sub dodate($)
{
    # convert datetime format DD[/-]MM[/-]YY[YY] HH:MM[:SS] from spreadsheet
    # parsers into the ISO-8601 dates that Date::Parse
    # seems to be able to parse correctly ... this would appear to
    # have to be YYYY-MM-DDTHH:MM:SS.000000 and then pass the timezone
    # as the second parameter to str2time()
    #
    my ($datetime) = @_;
    # date separators may be - or /, space separates date from time, time
    # separators are :
    my @field = split(/[ :\/-]/, $datetime);
    my $mm;
    my $yy;
    my $dd;

    if ($#field == 4) {
	# assume :SS is missing, set seconds to 00
	push(@field, "00");
    }

    if ($#field != 5) {
	print "dodate: bad datetime format: \"$datetime\" => ";
	foreach (@field) { print " $_"; }
	print "\n";
	exit(1);
    }

    if ($datefmt eq "DMY") {
	$dd = $field[0]; $mm = $field[1]; $yy = $field[2];
    }
    elsif ($datefmt eq "MDY") {
	$mm = $field[0]; $dd = $field[1]; $yy = $field[2];
    }
    elsif ($datefmt eq "YMD") {
	$yy = $field[0]; $mm = $field[1]; $dd = $field[2];
    }

    # get into cannonical DD, MM and YYYY format
    if ($dd < 10 && $dd !~ /^0/) { $dd .= "0" };	# add leading zero
    if ($mm < 10 && $mm !~ /^0/) { $mm .= "0" };	# add leading zero
    if ($yy < 100) {
	# terrible Y2K hack ... will stop working in 2080
	if ($yy <= 80) { $yy += 2000; }
	else { $yy += 1900; }
    }

    return $yy . "-" . $mm . "-" . $dd . "T" . $field[3] . ":" . $field[4] . ":" . $field[5];
}

# process the mapfile and set up the metadata and handles needed
# by the main loop
#
sub domap($)
{
    my ($mapfile) = @_;
    my $sts = 0;
    my $pmid;
    my $indom;
    my $units;
    my $type;
    my $sem;
    my $name;
    my $instance;
    my $lsts;

    my $parser = XML::TokeParser->new($mapfile, Noempty => 1);
    if (!defined($parser)) {
	print "sheet2pcp: Failed to open mapfile \"$mapfile\"\n";
	exit(1);
    }

    while (defined(my $token = $parser->get_token())) {
	if ($token->is_start_tag) {
	    if ($token->tag eq "sheet") {
		foreach my $a (keys %{$token->attr}) {
		    if ($a eq "heading") {
			$skip_rows = $token->attr->{heading};
		    }
		    elsif ($a eq "hostname") {
			if (pmiSetHostname($token->attr->{hostname}) < 0) {
			    print "Mapfile Warning: failed to set hostname " . $token->attr->{hostname} . ": " . pmiErrStr(-1) . "\n";
			}
		    }
		    elsif ($a eq "timezone") {
			$zone = $token->attr->{timezone};
		    }
		    elsif ($a eq "datefmt") {
			if ($token->attr->{datefmt} eq "DMY" ||
			    $token->attr->{datefmt} eq "MDY" ||
			    $token->attr->{datefmt} eq "YMD") {
			    $datefmt = $token->attr->{datefmt};
			}
			else {
			    print "Mapfile Error: bad format for attribute datefmt=\"" . $token->attr->{datefmt} . "\"\n";
			    $sts++;
			}
		    }
		    else {
			print "Mapfile Error: attribute $a=\"" . $token->attr->{$a} . "\" not expected for <sheet> tag\n";
			$sts++;
		    }
		}
	    }
	    elsif ($token->tag eq "metric") {
		$in_metric = 1;
		# defaults ...
		$pmid = PM_ID_NULL;
		$indom = PM_INDOM_NULL;
		$units = pmiUnits(0,0,0,0,0,0);
		$type = PM_TYPE_FLOAT;
		$sem = PM_SEM_INSTANT;
		$name = undef;
		$lsts = $sts;
		foreach my $a (keys %{$token->attr}) {
		    if ($a eq "pmid") {
			my $value = $token->attr->{pmid};
			if ($value =~ /^[0-9]+\.[0-9]+\.[0-9]+$/ ||
			    $value =~ /^PMI_DOMAIN\.[0-9]+\.[0-9]+$/) {
			    # expected N.N.N or PMI_DOMAIN.N.N format
			    my @args = split(/\./, $value);
			    $args[0] = PMI_DOMAIN if $args[0] eq "PMI_DOMAIN";
			    $pmid = pmid_build($args[0],$args[1],$args[2]);
			}
			elsif ($value eq "PM_ID_NULL") {
			    # accept literal default value
			    $pmid = PM_ID_NULL;
			}
			else {
			    print "Mapfile Error: bad format for attribute pmid=\"$value\"\n";
			    $sts++;
			}
		    }
		    elsif ($a eq "indom") {
			my $value = $token->attr->{indom};
			if ($value =~ /^[0-9]+\.[0-9]+$/ ||
			    $value =~ /^PMI_DOMAIN\.[0-9]+$/) {
			    # expected N.N or PMI_DOMAIN.N format
			    my @args = split(/\./, $value);
			    $args[0] = PMI_DOMAIN if $args[0] eq "PMI_DOMAIN";
			    $indom = pmInDom_build($args[0],$args[1]);
			}
			elsif ($value eq "PM_INDOM_NULL") {
			    # accept literal default value
			    $indom = PM_INDOM_NULL;
			}
			else {
			    print "Mapfile Error: bad format for attribute indom=\"$value\"\n";
			    $sts++;
			}
		    }
		    elsif ($a eq "units") {
			my $value = $token->attr->{units};
			my @args = split(/,/, $value);
			if ($#args != 5) {
			    print "Mapfile Error: bad format for attribute units=\"$value\"\n";
			    $sts++;
			}
			else {
			    for (my $i = 0; $i < 6; $i++) {
				$_ = eval($args[$i]);
				if (!defined($_)) {
				    print "Mapfile Error: bad component ($args[$i]) for attribute units=\"$value\"\n";
				    $sts++;
				}
				else {
				    $args[$i] = $_;
				}
			    }
			    if ($sts == 0) {
				$units = pmiUnits($args[0], $args[1], $args[2],
					    $args[3], $args[4], $args[5]);
			    }
			}
		    }
		    elsif ($a eq "type") {
			my $value = $token->attr->{type};
			$_ = eval($value);
			if (!defined($_)) {
			    print "Mapfile Error: bad value for attribute type=\"$value\"\n";
			    $sts++;
			}
			else {
			    $type = $_;
			}
		    }
		    elsif ($a eq "sem") {
			my $value = $token->attr->{sem};
			$_ = eval($value);
			if (!defined($_)) {
			    print "Mapfile Error: bad value for attribute sem=\"$value\"\n";
			    $sts++;
			}
			else {
			    $sem = $_;
			}
		    }
		    else {
			print "Mapfile Error: attribute $a=\"" . $token->attr->{$a} . "\" not expected for <metric> tag\n";
			$sts++;
		    }
		}
	    }
	    elsif ($token->tag eq "data") {
		$in_data = 1;
		$idx++;
		$name = undef;
		$instance = undef;
		$lsts = $sts;
		foreach my $a (keys %{$token->attr}) {
		    print "Mapfile Error: attribute $a=\"" . $token->attr->{$a} . "\" not expected for <data> tag\n";
		    $sts++;
		}
	    }
	    elsif ($token->tag eq "datetime") {
		$idx++;
		$stamp_idx = $idx;
		foreach my $a (keys %{$token->attr}) {
		    print "Mapfile Error: attribute $a=\"" . $token->attr->{$a} . "\" not expected for <datetime> tag\n";
		    $sts++;
		}
	    }
	    elsif ($token->tag eq "skip") {
		$idx++;
		foreach my $a (keys %{$token->attr}) {
		    print "Mapfile Error: attribute $a=\"" . $token->attr->{$a} . "\" not expected for <skip> tag\n";
		    $sts++;
		}
	    }
	    else {
		print "Mapfile Error: unexpected start tag " . $token->raw . "\n";
		$sts++;
	    }
	}
	elsif ($token->is_end_tag) {
	    if ($token->tag eq "sheet") {
		if ($stamp_idx == -1) {
		    print "Mapfile Error: missing <datetime> element\n";
		    $sts++;
		}
		elsif ($idx < 1) {
		    print "Mapfile Error: no <data> element\n";
		    $sts++;
		}
		# all finished, nothing more to be done
	    }
	    elsif ($token->tag eq "metric") {
		if (defined($name)) {
		    if ($lsts == $sts) {
			# no errors in this <metric ...>name</metric> element
			if (pmiAddMetric($name, $pmid, $type, $indom, $sem, $units) < 0) {
			    print "Mapfile Error: failed to define metric $name: " . pmiErrStr(-1) . "\n";
			    $sts++;
			}
			else {
			    # need metric name => indom for <data> later
			    #
			    $indom_map{$name} = $indom;
			}
		    }
		}
		else {
		    print "Mapfile Error: missing metric name in <metric> element\n";
		    $sts++;
		}
		$in_metric = 0;
	    }
	    elsif ($token->tag eq "data") {
		if (defined($name)) {
		    if ($lsts == $sts) {
			# no errors in this <data ...>metricspec</data> element
			$indom = $indom_map{$name};
			if (defined($indom)) {
			    if (defined($instance)) {
				if (!defined($inst_map{$indom . $instance})) {
				    # first time for this instance and indom
				    my $inst;
				    if (defined($inst_map{$indom})) {
					$inst_map{$indom}++;
					$inst = $inst_map{$indom};
				    }
				    else {
					# first time for this indom
					$inst_map{$indom} = 0;
					$inst = 0;
				    }
				    if (pmiAddInstance($indom, $instance, $inst) < 0) {
					print "Mapfile Error: failed to define instance \"$instance\" ($inst) for metric $name: " . pmiErrStr(-1) . "\n";
					$sts++;
				    }
				    else {
					# add new instance for indom
					$inst_map{$indom . $instance} = $inst;
				    }
				}
				my $h = pmiGetHandle($name, $instance);
				if ($h < 0) {
				    die "pmiGetHandle: failed to create handle for metricspec $name" . "[" . $instance . "]: " . pmiErrStr($sts) . "\n";
				    $sts++;
				}
				else {
				    push(@handle, $h);
				}
			    }
			    else {
				my $h = pmiGetHandle($name, "");
				if ($h < 0) {
				    die "pmiGetHandle: failed to create handle for metricspec $name: " . pmiErrStr($sts) . "\n";
				}
				else {
				    push(@handle, $h);
				}
			    }
			}
			else {
			    print "Mapfile Error: metric name ($name) in <data> element not defined in earlier <metric> element\n";
			    $sts++;
			}
		    }
		}
		else {
		    print "Mapfile Error: missing metricspec in <data> element\n";
		    $sts++;
		}
		$in_data = 0;
	    }
	    elsif ($token->tag eq "datetime" || $token->tag eq "skip") {
		# -1 flags this a column to be skipped
		push(@handle, -1);
	    }
	    else {
		print "Mapfile Error: unexpected end tag " . $token->raw . "\n";
		$sts++;
	    }
	}
	elsif ($token->is_text) {
	    if ($in_metric || $in_data) {
		$name = $token->text;
		$name =~ s/^\s+//;
		$name =~ s/\s+$//;
		if ($in_data) {
		    my @field = split(/\[/, $name);
		    if ($#field > 1) {
			print "Mapfile Error: extra [ in metricspec \"" . $token->text . "\" in <data> element\n";
			$sts++;
		    }
		    else {
			if (defined($field[1])) {
			    $name = $field[0];
			    $instance = $field[1];
			    if ($instance =~ /]$/) {
				$instance =~ s/]$//;
			    }
			    else {
				print "Mapfile Error: missing ] in metricspec \"" . $token->text . "\" in <data> element\n";
				$sts++;
			    }
			}
		    }
		}
	    }
	    else {
		print "Mapfile Error: unexpected text \"" . $token->text . "\"\n";
		$sts++;
	    }
	}
	elsif ($token->is_comment) {
	    # <!--pmiDump--> is special, silently ignore other comments
	    pmiDump() if $token->text eq "pmiDump";

	}
	elsif ($token->is_pi) {
	    print "Mapfile Warning: unexpected process instruction (ignored) " . $token->raw . "\n";
	}
    }
    if ($sts != 0) {
	print "Abandoned after $sts mapfile error";
	print "s" if $sts > 1;
	print "\n";
	exit(0);
    }
}

my $sts = getopts('h:Z:', \%options);

if (!defined($sts) || $#ARGV != 2) {
    print "Usage: sheet2pcp [-h host] [-Z timezone] infile mapfile outfile\n";
    exit(1);
}

if (exists($options{Z})) {
    $zone = $options{Z};
    if ($zone !~ /^[-+][0-9][0-9][0-9][0-9]$/) {
	print "sheet2pcp: Illegal -Z value, must be +NNNN or -NNNN\n";
	exit(1);
    }
}

# initialize the output archive so we can add the metadata from the mapfile
#
pmiStart($ARGV[2], 0);

if (exists($options{h})) {
    if (pmiSetHostname($options{h}) < 0) {
	print "sheet2pcp: Warning: failed to set hostname from -h " . $options{h} . ": " . pmiErrStr(-1) . "\n";
    }
}

# all the hard work is done here ...
#
domap($ARGV[1]);

# Serious strangeness here ...
# the Perl Date::Parse and Date::Format routines appear to
# only work with timezones of the format +NNNN or -NNNN
# ("UTC" is an exception)
#
# PCP expects a $TZ style timezone in the archive label, so
# we have to make up a PCP-xx:xx timezone ... note this
# invloves a sign reversal!
#
$label_zone = $zone;
if ($zone =~ /^[-+][0-9][0-9][0-9][0-9]/) {
    $label_zone =~ s/^\+/PCP-/;
    $label_zone =~ s/^-/PCP+/;
    $label_zone =~ s/(..)$/:$1/;
}
elsif ($zone ne "UTC") {
    print "sheet2pcp: Warning: unexpected timezone ($zone), reverting to UTC\n";
    $zone = "UTC";
    $label_zone = "UTC";
}
if (pmiSetTimezone($label_zone) < 0) {
    print "Mapfile Warning: failed to set timezone \"" . $label_zone . "\": " . pmiErrStr(-1) . "\n";
}

if ($ARGV[0] =~ /\.csv$/) {
    system("perl -MText::CSV_XS -e 1 >/dev/null 2>&1") == 0 or
	die "Perl Text::CSV_XS module not installed";
    $sheet = ReadData($ARGV[0]);
}
elsif ($ARGV[0] =~ /\.ods$/ || $ARGV[0] =~ /\.sxc$/) {
    system("perl -MArchive::Zip -e 1 >/dev/null 2>&1") == 0 or
	die "Perl Archive::Zip module not installed";
    system("perl -MSpreadsheet::ReadSXC -e 1 >/dev/null 2>&1") == 0 or
	die "Perl Spreadsheet::ReadSXC module not installed";
    $sheet = ReadData($ARGV[0], dtfmt => "yyyy-mm-dd");
}
elsif ($ARGV[0] =~ /\.xls$/) {
    system("perl -MOLE::Storage_Lite -e 1 >/dev/null 2>&1") == 0 or
	die "Perl OLE::Storage_Lite module not installed";
    system("perl -MSpreadsheet::ParseExcel -e 1 >/dev/null 2>&1") == 0 or
	die "Perl Spreadsheet::ParseExcel module not installed";
    $sheet = ReadData($ARGV[0], dtfmt => "yyyy-mm-dd");
}
elsif ($ARGV[0] =~ /\.xlsx$/) {
    system("perl -MOLE::Storage_Lite -e 1 >/dev/null 2>&1") == 0 or
	die "Perl OLE::Storage_Lite module not installed";
    system("perl -MSpreadsheet::ParseExcel -e 1 >/dev/null 2>&1") == 0 or
	die "Perl Spreadsheet::ParseExcel module not installed";
    system("perl -MSpreadsheet::XLSX -e 1 >/dev/null 2>&1") == 0 or
	die "Perl Spreadsheet::XLSX module not installed";
    $sheet = ReadData($ARGV[0], dtfmt => "yyyy-mm-dd");
}
else {
    print "sheet2pcp: Error: No clue how to deduce format of spreadsheet $ARGV[0]\n";
    exit(1);
}

if (!defined($sheet)) {
    print "sheet2pcp: Failed to open spreadsheet \"$ARGV[0]\"\n";
    exit(1);
}

#debug# print "maxrow=$sheet->[1]{maxrow} maxcol=$sheet->[1]{maxcol}\n";
#debug# print "mapfile " . ($idx+1) . " columns, timestamp @ column " . $stamp_idx . "\n";

if ($sheet->[1]{maxcol} != $idx+1) {
    print "sheet2pcp: Warning: columns from mapfile (" . ($idx+1) . ") not equal to columns from spreadsheet (" . $sheet->[1]{maxcol} . "), some data will not be exported\n";
}

for (my $row = 1; $row <= $sheet->[1]{maxrow}; $row++) {
    my $stamp = undef;
    if ($skip_rows) {
	$skip_rows--;
	next;
    }
    for (my $col = 1; $col <= $sheet->[1]{maxcol}; $col++) {
	my $cell = cr2cell($col, $row);
	# ignore columns after last one in mapfile
	next if  ($col > $idx+1);
	#debug# print "$cell = $sheet->[1]{$cell}\n"
	if (!defined($handle[$col-1])) {
	    pmiDump();
	    die "No handle[] entry for cell[" . $cell . "].  Check Handles in dump above.\n";
	}
	if (!defined($sheet->[1]{$cell})) {
	    print "Warning: cell[" . $cell . "] empty, but data expected\n";
	}
	else {
	    if ($col == $stamp_idx+1) {
		$stamp = dodate($sheet->[1]{$cell});
		#debug# print $sheet->[1]{$cell} . " -> " . $stamp . "\n";
	    }
	    elsif ($handle[$col-1] != -1) {
		pmiPutValueHandle($handle[$col-1], $sheet->[1]{$cell}) >= 0
		    or die "pmiPutValueHandle: failed at cell[" . $cell . "]: " . pmiErrStr(-1) . "\n";
	    }
	}
    }
    if (!defined($stamp)) {
	die "Error: no datetime at row[ " . $row . "]";
    }
    pmiWrite(str2time($stamp, $zone), 0) >= 0
	or die "pmiWrite: at row[ ". $row . "] ($stamp): " . pmiErrStr(-1) . "\n";
}

pmiEnd();

exit(0);

=pod

=head1 NAME

sheet2pcp - Import spreadsheet data and create a PCP archive

=head1 SYNOPSIS

B<sheet2pcp> [B<-h> I<host>] [B<-Z> I<timezone>] I<infile> I<mapfile> I<outfile>

=head1 DESCRIPTION

B<sheet2pcp> is intended to read a data spreadsheet (I<infile>)
translate this into a Performance
Co-Pilot (PCP) archive with the basename I<outfile>.

The input spreadsheet can be in any of the common formats, provided
the appropriate Perl modules have been installed (see the B<CAVEATS>
section below).  The spreadsheet must be E<quot>normalizedE<quot>
so that each row contains data for the same time interval, and one
of the columns contains the date and time for the data in each
row.

The resultant PCP archive may be used with all the PCP client tools
to graph subsets of the data using B<pmchart>(1),
perform data reduction and reporting, filter with
the PCP inference engine B<pmie>(1), etc.

The I<mapfile> controls the import process and defines the data
mapping from the spreadsheet columns onto the PCP data model.  The file
is written in XML and conforms to the syntax defined in the
B<MAPPING CONFIGURATION> section below.

A series of physical files will be created with the prefix I<outfile>.
These are I<outfile>B<.0> (the performance data),
I<outfile>B<.meta> (the metadata that describes the performance data) and
I<outfile>B<.index> (a temporal index to improve efficiency of replay
operations for the archive).  If any of these files exists already,
then B<sheet2pcp> will B<not> overwrite them and will exit with an error
message.

The B<-h> option is an alternate to the 
B<hostname> attribute of the B<E<lt>sheetE<gt>> element in I<mapfile>
described below.  If both are specified, the value from I<mapfile> is
used.

The B<-Z> option is an alternate to the 
B<timezone> attribute of the B<E<lt>sheetE<gt>> element in I<mapfile>
described below.  If both are specified, the value from I<mapfile> is
used.

B<sheet2pcp> is a Perl script that uses the PCP::LogImport Perl wrapper
around the PCP I<libpcp_import>
library, and as such could be used as an example to develop new
tools to import other types of performance data and create PCP archives.

=head1 MAPPING CONFIGURATION

The I<mapfile> contains specifications in standard XML format.

The whole specification is wrapped in a B<E<lt>sheetE<gt>> ... B<E<lt>/sheetE<gt>>
element.
The  B<sheet> tag supports the following optional attributes:

=over 10

=item B<heading>

Specifies the number of
heading rows to skip at the start of the spreadsheet before processing data.
Example: heading="1".

=item B<hostname>

Set the source hostname in the PCP archive (the
default is to use the hostname of the local host).
Example: hostname="some.where.com".

=item B<timezone>

Set the source timezone in the PCP archive (the
default is to use UTC).  The timezone must have the
format +HHMM (for hours and minutes East of UTC) or -HHMM (for hours
and minutes West of UTC).  Note in particular that B<neither> the B<zoneinfo>
(aka Olson) format, e.g. Europe/Paris, nor the Posix B<TZ> format, e.g.
EST+5 is allowed.
Example: timezone="+1100".

=item B<datefmt>

The format of the date imported from the spreadsheet may be specified
as a concatenation of
values that specify the
order of the year (B<Y>), month (B<M>) and day (B<D>) fields in a date.
The supported variants are B<DMY> (the default),
B<MDY> and B<YMD>.
Example: datefmt="YMD".

=back

A B<E<lt>sheetE<gt>> element contains
one or more metric specifications of
the form B<E<lt>metricE<gt>>I<metricname>B<E<lt>/metricE<gt>>.  The B<metric>
tag supports the following optional attributes:

=over 10

=item B<pmid>

The Performance Metrics Identifier (PMID), specified as 3 numbers
separated by a periods (.) to
set the B<domain>, B<cluster> and B<item> fields of the PMID, see B<PMNS>(4)
for more details of PMIDs.  If omitted, the PMID will be automatically
assigned by B<pmiAddMetric>(3).
The value B<PM_ID_NULL> may be used to explicitly nominate
the default behaviour.
Examples: pmid="60.0.2", pmid="PM_ID_NULL".

=item B<indom>

Each metric may have one or more values.  If a metric B<always>
has one value, it is singular and the Instance Domain should be set to
B<PM_INDOM_NULL>.
Otherwise B<indom> should be specified as 2 numbers separated by a period (.)
to set the B<domain> and B<ordinal> fields of the Instance Domain, see
the B<__pmInDom_int> typedef in I<E<lt>pcp/impl.hE<gt>>.
Examples: indom="PM_INDOM_NULL", indom="60.3", indom="PMI_DOMAIN.4".

More than
one metric can share the same Instance Domain when the metrics have defined
values over similar sets of instances, e.g. all the metrics for each network
interface.  It is standard practice for the B<domain> field to be the
same for the B<pmid> and the B<indom>; if the B<pmid> attribute is missing,
then the B<domain> field for the B<indom> should be the reserved domain
B<PMI_DOMAIN>.

If the B<indom> attribute is omitted then the default Instance Domain for
the metric is B<PM_INDOM_NULL>.

=item B<units>

The scale and dimension of the metric values along the axes of space, time
and count (events, messages, packets, etc.) is specified with a 6-tuple.
These values are passed to the B<pmiUnits>(3) function to generate a
I<pmUnits> structure.  Refer to B<pmLookupDesc>(3) for a full description
of all the fields of this structure.
The default is to assign no scale or dimension to the metric, i.e. units="0,0,0,0,0,0".
Examples: units="0,1,0,0,PM_TIME_MSEC,0" (milliseconds),
units="1,-1,0,PM_SPACE_MBYTE,PM_TIME_SEC,0" (Mbytes/sec),
units="0,1,-1,0,PM_TIME_USEC,PM_COUNT_ONE" (microseconds/event).

=item B<type>

Defines the data type for the metric.
Refer to B<pmLookupDesc>(3) for a full description
of the possible type values; the default is B<PM_TYPE_FLOAT>.
Examples: type="PM_TYPE_32", type="PM_TYPE_U64", type="PM_TYPE_STRING".

=item B<sem>

Defines the semantics of the metric.
Refer to B<pmLookupDesc>(3) for a full description
of the possible values; the default is B<PM_SEM_INSTANT>.
Examples: sem="PM_SEM_COUNTER", type="PM_SEM_DISCRETE".

=back

The remaining specifications define the data columns B<in order> using
B<exactly> one B<E<lt>datetimeE<gt>>B<E<lt>/datetimeE<gt>> element,
one or more B<E<lt>dataE<gt>>I<metricspec>B<E<lt>/dataE<gt>> elements
and
one or more B<E<lt>skipE<gt>>B<E<lt>/skipE<gt>> elements.

The B<E<lt>datetimeE<gt>> element defines the column in which a date and time will
be found to form the timestamp in the PCP archive for all the data in
each row of the PCP archive.

For the B<E<lt>dataE<gt>> element,
a I<metricspec>
consists of a metric name (as defined in an earlier B<E<lt>metricE<gt>>
element), optionally followed by an instance name that is enclosed by square brackets,
e.g. <data>hinv.ncpu</data>, <data>kernel.all.load[1 minute]</data>.

The B<skip> tag defines the column that should be skipped when preparing
data for the PCP archive.

The order of the B<E<lt>datetimeE<gt>>, B<E<lt>dataE<gt>> and
B<E<lt>skipE<gt>> elements matches the order of columns in the
spreadsheet.  If the number of elements is not the same as the number
of columns a warning is issued, and the extra elements or columns
generate no metric values in the output archive.

=head2 EXAMPLE

The I<mapfile> ...

    <?xml version="1.0" encoding="UTF-8"?>
    <sheet heading="1">
	<!-- simple example -->
	<metric pmid="60.0.2" indom="60.0" units="0,1,0,0,PM_TIME_MSEC,0"
	    type="PM_TYPE_U64" sem="PM_SEM_COUNTER">
	kernel.percpu.cpu.sys</metric>
	<datetime></datetime>
	<skip></skip>
	<data>kernel.percpu.cpu.sys[cpu0]</data>
	<data>kernel.percpu.cpu.sys[cpu1]</data>
    </sheet>

could be used for a spreadsheet in which the first few rows are ...

    Date;"Status";"SysTime - 0";"SysTime - 1";
    26/01/2001 14:05:22;"Some Busy";0.750;0.133
    26/01/2001 14:05:37;"OK";0.150;0.273
    26/01/2001 14:05:52;"All Busy";0.733;0.653

=head1 CAVEATS

Only the first sheet from I<infile> will be processed.

Additional Perl modules must be installed for the various spreadsheet formats,
although these are checked for ar run-time so only the modules required for
the specific types of spreadsheets you wish to process need be installed:

=over 6

=item B<*.csv>

Spreadsheets in the Comma Separated Values (CSV) format require B<Text::CSV_XS>(3pm).

=item B<*.sxc> or B<*.ods>

OpenOffice documents require B<Spreadsheet::ReadSXC>(3pm), which in turn
requires B<Archive::Zip>(3pm).

=item B<*.xls>

Classical Microsoft Office documents require B<Spreadsheet::ParseExcel>(3pm),
which in turn requires B<OLE::Storage_Lite>(3pm).

=item B<*.xlsx>

Microsoft OpenXML documents require B<Spreadsheet::XLSX>(3pm).  B<sheet2pcp>
does not appear to work with OpenXML documents saved from OpenOffice.

=back

=head1 SEE ALSO

B<Archive::Zip>(3pm),
B<Date::Format>(3pm),
B<Date::Parse>(3pm),
B<LOGIMPORT>(3),
B<OLE::Storage_Lite>(3pm),
B<PCP::LogImport>(3pm),
B<pmchart>(1),
B<pmiAddMetric>(3), 
B<pmie>(1),
B<pmiUnits>(3),
B<pmlogger>(1),
B<pmLookupDesc>(3),
B<PMNS>(4),
B<Spreadsheet::ParseExcel>(3pm),
B<Spreadsheet::ReadSXC>(3pm),
B<Spreadsheet::XLSX>(3pm),
B<Text::CSV_XS>(3pm)
and
B<XML::TokeParser>(3pm).