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#!@@PERL@@ -w
# -*- perl -*-
=head1 NAME
iostat - Plugin for watching io-bound traffic (in KiloBytes) on disks
=head1 CONFIGURATION
No configuration
=head1 NOTES
=head2 DESCRIPTION
This version of iostat will report back the amount of I/O on a per
disk basis. It includes the vpaths in it's report. The I/O for a
vpath is the sum of the reads/writes of all the hdisks assosciated
with it. It uses /usr/bin/iostat.
=head2 RESTRICTIONS
Not restricted to a particular user.
You will have to enable disk accounting for this to work correctly.
You can do this through 'smitty chgsys -> Continuously maintain DISK
I/O history', change this to true, or you can do it at the command
line with this command "chdev -l sys0 -a iostat='true'".
Note: If you have virtual paths, typical when gigabit fiber cards are
installed and attached to an ESS (Shark) or some sort of large disk
array, this will combine the I/O for all hdisks associated with a
vpath so you get global statistics for a vpath. This is to avoid
having a list of hdisks that spans multiple pages.
=head1 AUTHOR
Unknown author
=head1 LICENSE
GPLv2
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=cut
use strict;
use POSIX;
my($arg) = shift;
if($arg && $arg eq "autoconf") {
if ( (-e "/usr/bin/iostat" && -X "/usr/bin/iostat") &&
(-e '/usr/sbin/lspv' && -X '/usr/sbin/lspv') ) {
print "yes\n";
exit 0;
} else {
print "no (Need /usr/bin/iostat and /usr/sbin/lspv)\n";
exit 0;
}
}
if($arg && $arg eq "config")
{
print "graph_title IOstat\n";
print "graph_args --base 1024 --logarithmic\n";
print "graph_vlabel KB / \${graph_period}\n";
print "graph_category disk\n";
my(@info) = getDiskIO("disk only");
my($line);
foreach $line (@info)
{
print "$line.label $line\n";
print "$line.type COUNTER\n";
print "$line.max 100000\n";
}
exit 0;
}
my(@info) = getDiskIO('');
my($line);
foreach $line (@info)
{print "$line";}
@info = processVPaths();
foreach $line (@info)
{print "$line";}
sub getDiskIO
{
my($diskOnly) = @_;
my($line,@lineArray,@diskArray,$writes,$reads,$diskLine);
if($diskOnly && $diskOnly eq 'disk only')
{
open DISKLIST, "/usr/sbin/lspv|egrep 'hdisk|vpath'|grep -v none|";
while($line = <DISKLIST>)
{
@lineArray = split(/ +/,$line);
push(@diskArray,"$lineArray[0]_read","$lineArray[0]_write");
}
}
else
{
open DISKLIST, "/usr/sbin/lspv|grep hdisk|grep -v none|";
while($line = <DISKLIST>)
{
@lineArray = split(/ +/,$line);
$diskLine = `/usr/bin/iostat|grep $lineArray[0]`;
@lineArray = split(/ +/,$diskLine);
$writes = $lineArray[5];
chomp($writes);
$reads = $lineArray[4];
chomp($reads);
push(@diskArray,"$lineArray[0]_read.value $reads\n","$lineArray[0]_write.value $writes\n");
}
}
return @diskArray
}
sub processVPaths
{
open DISKLIST, "/usr/sbin/lspv|grep vpath|";
my($line,$hdiskLine,@diskArray,$reads,$writes);
while($line = <DISKLIST>)
{
my(@vpathArr) = split(/ +/,$line);
my($vpathNum) = substr($vpathArr[0],index($vpathArr[0],"h")+1);
open VPATHINFO, "/usr/bin/datapath query device $vpathNum|grep hdisk|";
$reads = 0;
$writes = 0;
while($hdiskLine = <VPATHINFO>)
{
my(@hdiskInfo) = split(/ +/,$hdiskLine);
my($hdisk) = substr($hdiskInfo[2],index($hdiskInfo[2],"/")+1);
my($diskLine) = `/usr/bin/iostat|grep $hdisk`;
my(@lineArray) = split(/ +/,$diskLine);
$reads += $lineArray[4];
$writes += $lineArray[5];
}
push(@diskArray,$vpathArr[0]."_read.value $reads\n",$vpathArr[0]."_write.value $writes\n");
}
return @diskArray;
}
sub printArray
{
my($array,$spacer,$useNums,@labels) = @_;
my($item,);
my($count) = 0;
foreach $item (@{$array})
{
if($useNums == 1)
{print $count.substr($spacer,0,length($spacer)-length($count)).$item."\n";}
else
{print $labels[$count].substr($spacer,0,length($spacer)-length($labels[$count])).$item."\n";}
$count++;
}
}
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