Explicitly write default values
so that scan and flushing behavior can be easily changed
diff --git a/start-onos-embedded.sh b/start-onos-embedded.sh
index c967419..5202daf 100755
--- a/start-onos-embedded.sh
+++ b/start-onos-embedded.sh
@@ -73,7 +73,7 @@
 
 # Create a logback file if required
   cat <<EOF_LOGBACK >${ONOS_LOGBACK}
-<configuration scan="true" debug="true">
+<configuration scan="true" scanPeriod="1 minutes" debug="true">
 <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
 <encoder>
 <pattern>%level [%logger:%thread] %msg%n</pattern>
@@ -84,6 +84,7 @@
 <file>${ONOS_LOG}</file>
 <encoder>
 <pattern>%date %level [%thread] %logger{10} [%file:%line] %msg%n</pattern>
+<immediateFlush>true</immediateFlush>
 </encoder>
 </appender>