diff -Nur smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/db/configuration/defaults/yum/DeltaRpmProcess smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/db/configuration/defaults/yum/DeltaRpmProcess
--- smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/db/configuration/defaults/yum/DeltaRpmProcess	1970-01-01 01:00:00.000000000 +0100
+++ smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/db/configuration/defaults/yum/DeltaRpmProcess	2016-07-27 16:03:19.325764388 +0200
@@ -0,0 +1 @@
+disabled
diff -Nur smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/locale/en-us/etc/e-smith/web/functions/yum smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/locale/en-us/etc/e-smith/web/functions/yum
--- smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/locale/en-us/etc/e-smith/web/functions/yum	2016-02-06 00:19:56.000000000 +0100
+++ smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/locale/en-us/etc/e-smith/web/functions/yum	2016-07-28 03:07:51.050115158 +0200
@@ -259,5 +259,17 @@
       <base>3MONTHLY</base>
       <trans>Monthly</trans>
     </entry>
- 
+
+    <entry>
+      <base>LABEL_YUM_DELTARPMPROCESS</base>
+      <trans>Delta Rpm Update</trans>
+    </entry>
+
+    <entry>
+      <base>LABEL_YUM_DELTARPM</base>
+      <trans>A deltarpm contains the difference between an old and a new version of a rpm, 
+             which can save bandwith. The drawback is that update 
+             operations consume considerably more CPU cycles</trans>
+    </entry>
+
 </lexicon>
diff -Nur smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/templates/etc/yum.conf/10main_deltarpm smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/templates/etc/yum.conf/10main_deltarpm
--- smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/templates/etc/yum.conf/10main_deltarpm	1970-01-01 01:00:00.000000000 +0100
+++ smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/templates/etc/yum.conf/10main_deltarpm	2016-07-28 03:04:17.146569284 +0200
@@ -0,0 +1,6 @@
+{
+my $deltaRpm = $yum{DeltaRpmProcess} || 'disabled';
+$deltaRpm = '0' if ($deltaRpm eq 'disabled');
+$deltaRpm = '2' if ($deltaRpm eq 'enabled');
+$OUT .= "deltarpm=$deltaRpm";
+}
diff -Nur smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/templates/etc/yum.smerepos.d/sme-base.repo/20repositories smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/templates/etc/yum.smerepos.d/sme-base.repo/20repositories
--- smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/templates/etc/yum.smerepos.d/sme-base.repo/20repositories	2013-01-31 17:35:08.000000000 +0100
+++ smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/templates/etc/yum.smerepos.d/sme-base.repo/20repositories	2016-07-22 12:39:51.712834542 +0200
@@ -47,6 +47,12 @@
 	    $OUT .= "gpgkey" . '=' . $props{GPGKey} . "\n";
 	} 
 
+        if (exists $props{DeltaRpmPercentage})
+        {
+            my $deltarpmpercentage = $props{DeltaRpmPercentage};
+            $deltarpmpercentage = '0' if ($deltarpmpercentage eq 'disabled');
+            $OUT .= "deltarpm_percentage" . '=' . $deltarpmpercentage . "\n";
+        }
 
 	$OUT .= "\n";
     }
diff -Nur smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/web/functions/yum smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/web/functions/yum
--- smeserver-yum-2.6.0.bz8834.old/root/etc/e-smith/web/functions/yum	2013-01-31 17:35:08.000000000 +0100
+++ smeserver-yum-2.6.0.bz8834.new/root/etc/e-smith/web/functions/yum	2016-07-28 03:06:35.682275166 +0200
@@ -126,6 +126,13 @@
 
         <field
             type="literal"
+            id="state_deltarpmprocess"
+            value="get_status('DeltaRpmProcess', 'localise')">
+            <label>LABEL_YUM_DELTARPMPROCESS</label>
+        </field>
+
+        <field
+            type="literal"
             id="button_configuration"
             value="">
             <description>DESC_BUTTON_CONFIGURATION</description>
@@ -245,6 +252,14 @@
             <description>DESC_ENABLED_REPOSITORIES</description>
         </field>
 
+        <field
+            type="select"
+            id="yum_DeltaRpmProcess"
+            options="'disabled' => 'DISABLED','enabled'=>'ENABLED'"
+            value="get_status('DeltaRpmProcess')">
+            <label>LABEL_YUM_DELTARPMPROCESS</label>
+            <description>LABEL_YUM_DELTARPM</description>
+        </field>
 
         <subroutine src="print_button('SAVE')" />
     </page>
diff -Nur smeserver-yum-2.6.0.bz8834.old/root/usr/share/perl5/vendor_perl/esmith/FormMagick/Panel/yum.pm smeserver-yum-2.6.0.bz8834.new/root/usr/share/perl5/vendor_perl/esmith/FormMagick/Panel/yum.pm
--- smeserver-yum-2.6.0.bz8834.old/root/usr/share/perl5/vendor_perl/esmith/FormMagick/Panel/yum.pm	2013-01-31 17:35:08.000000000 +0100
+++ smeserver-yum-2.6.0.bz8834.new/root/usr/share/perl5/vendor_perl/esmith/FormMagick/Panel/yum.pm	2016-07-27 16:02:34.678859179 +0200
@@ -207,6 +207,9 @@
     $db->set_prop('yum', 'check4updates', $check4updates);
     $db->set_prop('yum', 'status', $status);
 
+    my $deltarpm = $q->param("yum_DeltaRpmProcess");
+    $db->set_prop('yum', 'DeltaRpmProcess', $deltarpm);
+
     my %selected = map {$_ => 1} $q->param('SelectedRepositories');
 
     foreach my $repos (