--- loncom/lonnet/perl/lonnet.pm	2010/07/23 14:59:24	1.1075
+++ loncom/lonnet/perl/lonnet.pm	2010/07/24 17:42:51	1.1076
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1075 2010/07/23 14:59:24 raeburn Exp $
+# $Id: lonnet.pm,v 1.1076 2010/07/24 17:42:51 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -812,6 +812,27 @@ sub has_user_session {
     return 0;
 }
 
+# --------- determine least loaded server in a user's domain which allows login
+
+sub choose_server {
+    my ($udom) = @_;
+    my %domconfhash = &Apache::loncommon::get_domainconf($udom);
+    my %servers = &servers($udom);
+    my $lowest_load = 30000;
+    my ($login_host,$hostname);
+    foreach my $lonhost (keys(%servers)) {
+        my $loginvia = $domconfhash{$udom.'.login.loginvia_'.$lonhost};
+        if ($loginvia eq '') {
+            ($login_host, $lowest_load) =
+            &compare_server_load($lonhost, $login_host, $lowest_load);
+        }
+    }
+    if ($login_host ne '') {
+        $hostname = $servers{$login_host};
+    }
+    return ($login_host,$hostname);
+}
+
 # --------------------------------------------- Try to change a user's password
 
 sub changepass {