From 99c552bff6f4dddd9bbbb3806dcca44ea845f5cc Mon Sep 17 00:00:00 2001
From: Benjamin Oechslein <benjamin.oechslein@informatik.uni-erlangen.de>
Date: Mon, 12 Jan 2015 21:10:04 +0100
Subject: [PATCH] Trigger data migration if limits of a data source are changed
 in config file

---
 upsgraph.pl | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/upsgraph.pl b/upsgraph.pl
index 4f66090..ce19500 100755
--- a/upsgraph.pl
+++ b/upsgraph.pl
@@ -324,12 +324,15 @@ foreach my $host (@$hosts) {
 			exit 1;
 		}
 
+		my $limitsChanged = 0;
 		if (defined($rrdinfo->{"ds[${field}].min"})) {
 			if ($rrdinfo->{"ds[${field}].min"} ne $host->{'vars'}->{$field}->{'min'}) {
+				$limitsChanged = 1;
 				RRDs::tune("${rrdfile}.${field}","-i",$field.":".$host->{'vars'}->{$field}->{'min'});
 			}
 		} else {
 			if ($host->{'vars'}->{$field}->{'min'} ne 'U') {
+				$limitsChanged = 1;
 				RRDs::tune("${rrdfile}.${field}","-i",$field.":".$host->{'vars'}->{$field}->{'min'});
 			}
 		}
@@ -341,10 +344,12 @@ foreach my $host (@$hosts) {
 
 		if (defined($rrdinfo->{"ds[${field}].max"})) {
 			if ($rrdinfo->{"ds[${field}].max"} ne $host->{'vars'}->{$field}->{'max'}) {
+				$limitsChanged = 1;
 				RRDs::tune("${rrdfile}.${field}","-a",$field.":".$host->{'vars'}->{$field}->{'max'});
 			}
 		} else {
 			if ($host->{'vars'}->{$field}->{'max'} ne 'U') {
+				$limitsChanged = 1;
 				RRDs::tune("${rrdfile}.${field}","-a",$field.":".$host->{'vars'}->{$field}->{'max'});
 			}
 		}
@@ -355,7 +360,8 @@ foreach my $host (@$hosts) {
 		}
 		    
 		if ($rrdinfo->{'rra[0].rows'} != $keep ||
-			!defined($rrdinfo->{'rra[1].rows'}) || $rrdinfo->{'rra[1].rows'} != $keepHours) {
+			!defined($rrdinfo->{'rra[1].rows'}) || $rrdinfo->{'rra[1].rows'} != $keepHours ||
+			$limitsChanged == 1) {
 
 			print "Resizing ${rrdfile}.${field} from " . $rrdinfo->{'rra[0].rows'} .
 				" to ${keep} samples.\n";
-- 
2.39.2