diff --git a/README.rst b/README.rst
index e285e13..4baa550 100644
--- a/README.rst
+++ b/README.rst
@@ -921,7 +921,8 @@
     opencontrail:
       ...
       config:
-        api_workers: 3
+        api:
+          workers_count: 3
       ...
 
 Increase number of alarm-gen workers
diff --git a/opencontrail/files/3.0/contrail-api.ini b/opencontrail/files/3.0/contrail-api.ini
index 4caaeb3..f6b6af2 100644
--- a/opencontrail/files/3.0/contrail-api.ini
+++ b/opencontrail/files/3.0/contrail-api.ini
@@ -1,11 +1,11 @@
 {%- from "opencontrail/map.jinja" import config with context -%}
 [program:contrail-api]
-{%- if config.get('api_workers', 1) < 2 %}
+{%- if config.get('api', {}).get('workers_count', 1) < 2 %}
 command=/usr/bin/contrail-api --conf_file /etc/contrail/contrail-api.conf --conf_file /etc/contrail/contrail-keystone-auth.conf --worker_id %(process_num)s
 numprocs=1
 {%- else %}
 command=/usr/bin/contrail-api --conf_file /etc/contrail/contrail-api.conf --conf_file /etc/contrail/contrail-keystone-auth.conf --worker_id %(process_num)s --listen_port 910%(process_num)s --admin_port 819%(process_num)s --http_server_port 828%(process_num)s --log_file /var/log/contrail/contrail-api-%(process_num)s.log
-numprocs={{ config.api_workers }}
+numprocs={{ config.api.workers_count }}
 {%- endif %}
 process_name=%(process_num)s
 redirect_stderr=true
diff --git a/opencontrail/files/4.0/contrail-api.ini b/opencontrail/files/4.0/contrail-api.ini
index 4caaeb3..f6b6af2 100644
--- a/opencontrail/files/4.0/contrail-api.ini
+++ b/opencontrail/files/4.0/contrail-api.ini
@@ -1,11 +1,11 @@
 {%- from "opencontrail/map.jinja" import config with context -%}
 [program:contrail-api]
-{%- if config.get('api_workers', 1) < 2 %}
+{%- if config.get('api', {}).get('workers_count', 1) < 2 %}
 command=/usr/bin/contrail-api --conf_file /etc/contrail/contrail-api.conf --conf_file /etc/contrail/contrail-keystone-auth.conf --worker_id %(process_num)s
 numprocs=1
 {%- else %}
 command=/usr/bin/contrail-api --conf_file /etc/contrail/contrail-api.conf --conf_file /etc/contrail/contrail-keystone-auth.conf --worker_id %(process_num)s --listen_port 910%(process_num)s --admin_port 819%(process_num)s --http_server_port 828%(process_num)s --log_file /var/log/contrail/contrail-api-%(process_num)s.log
-numprocs={{ config.api_workers }}
+numprocs={{ config.api.workers_count }}
 {%- endif %}
 process_name=%(process_num)s
 redirect_stderr=true
diff --git a/opencontrail/files/4.0/contrail-config-nodemgr.conf b/opencontrail/files/4.0/contrail-config-nodemgr.conf
index d9964ca..6653427 100644
--- a/opencontrail/files/4.0/contrail-config-nodemgr.conf
+++ b/opencontrail/files/4.0/contrail-config-nodemgr.conf
@@ -1,7 +1,7 @@
 {%- from "opencontrail/map.jinja" import config,database with context %}
 {%- if database is defined and config.version >= 4.0 %}
 [DEFAULTS]
-minimum_diskGB={{ database.get('minimum_disk', 80) }}
+minimum_diskGB={{ database.get('minimum_disk', 150) }}
 hostip={{ database.bind.get('host', '127.0.0.1') }}
 db_port={{ database.bind.get('port_configdb', database.bind.get('port', 9042)) }}
 {%- endif %}
diff --git a/opencontrail/files/4.0/database/cassandra-env.sh b/opencontrail/files/4.0/database/cassandra-env.sh
index 7f2145c..e3ad874 100644
--- a/opencontrail/files/4.0/database/cassandra-env.sh
+++ b/opencontrail/files/4.0/database/cassandra-env.sh
@@ -93,13 +93,14 @@
 jvmver=`echo "$java_ver_output" | grep '[openjdk|java] version' | awk -F'"' 'NR==1 {print $2}'`
 JVM_VERSION=${jvmver%_*}
 JVM_PATCH_VERSION=${jvmver#*_}
+COMPARE_CMD="dpkg --compare-versions"
 
-if [ "$JVM_VERSION" -lt "1.7" ] ; then
+if $COMPARE_CMD "$JVM_VERSION" lt "1.7"  ; then
     echo "Cassandra 2.0 and later require Java 7u25 or later."
     exit 1;
 fi
 
-if [ "$JVM_VERSION" -lt "1.8" ] && [ "$JVM_PATCH_VERSION" -lt "25" ] ; then
+if $COMPARE_CMD "$JVM_VERSION" lt "1.8"  && $COMPARE_CMD "$JVM_PATCH_VERSION" lt "25" ; then
     echo "Cassandra 2.0 and later require Java 7u25 or later."
     exit 1;
 fi
@@ -229,7 +230,7 @@
 JVM_OPTS="$JVM_OPTS -XX:CMSWaitDuration=10000"
 
 # note: bash evals '1.7.x' as > '1.7' so this is really a >= 1.7 jvm check
-if { [ "$JVM_VERSION" -gt "1.7" ] && [ "$JVM_VERSION" -lt "1.8.0" ] && [ "$JVM_PATCH_VERSION" -ge "60" ]; } || [ "$JVM_VERSION" -gt "1.8" ] ; then
+if { $COMPARE_CMD "$JVM_VERSION" gt "1.7" && $COMPARE_CMD "$JVM_VERSION" lt "1.8.0" && $COMPARE_CMD "$JVM_PATCH_VERSION" ge "60" ; } || $COMPARE_CMD "$JVM_VERSION" gt "1.8" ; then
     JVM_OPTS="$JVM_OPTS -XX:+CMSParallelInitialMarkEnabled -XX:+CMSEdenChunksRecordAlways -XX:CMSWaitDuration=10000"
 fi