diff --git a/chef/cookbooks/openstack-block-storage/recipes/volume.rb b/chef/cookbooks/openstack-block-storage/recipes/volume.rb
index 00d08da..7c1e674 100644
--- a/chef/cookbooks/openstack-block-storage/recipes/volume.rb
+++ b/chef/cookbooks/openstack-block-storage/recipes/volume.rb
@@ -99,7 +99,7 @@ case node["openstack"]["block-storage"]["volume"]["driver"]
    
   when "cinder.volume.drivers.lvm.LVMISCSIDriver"
     package "bc" do
-      action :install
+      action :upgrade
     end
 
     openstack_block_storage_volume node["openstack"]["volume"]["disk"] do
@@ -109,24 +109,6 @@ case node["openstack"]["block-storage"]["volume"]["driver"]
     openstack_block_storage_volume node["openstack"]["volume"]["disk"] do
       action :mk_cinder_vol
     end
-
-#    template "/tmp/cinder_volumes.sh" do
-#      source "cinder_volumes.sh.erb"
-#      owner "root"
-#      group "root"
-#      mode  00755
-#      variables( 
-#        :volumesize => node["openstack"]["volume"]["size"]
-#      )
-#      notifies :run, "execute[create_cinder_volumes]", :immediately
-#      only_if { node["openstack"]["volume"]["mode"] == "loopfile" }
-#    end
-
-#    execute "create_cinder_volumes" do
-#      command "sh /tmp/cinder_volumes.sh"
-#      action :run
-#      only_if { node["openstack"]["volume"]["mode"] == "loopfile" }
-#    end
 end
 
 service "cinder-volume" do
diff --git a/chef/cookbooks/openstack-block-storage/templates/default/cinder_volumes.sh.erb b/chef/cookbooks/openstack-block-storage/templates/default/cinder_volumes.sh.erb
deleted file mode 100644
index 08a93d5..0000000
--- a/chef/cookbooks/openstack-block-storage/templates/default/cinder_volumes.sh.erb
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/bin/bash
-# This file is going to create a loop file as volume disk.
-#
-ERRTRAP()
-{
-    echo "[FILE: "$PWD/$(basename "$(test -L "$0" && readlink "$0" || echo "$0")")", LINE: $1] Error: Command or function exited with status $?"
-}
-
-trap 'ERRTRAP $LINENO' ERR
-
-vgdisplay |grep cinder-volumes
-
-if [ $? -ne 0 ]; then
-  SPACESIZE=$(df -P |grep -vE "^tmpfs|cdrom|tmp" | sed '1d' | awk '{print $4}' | sort -nr | sed -n -e '1{p;q}')
-  MOUNTPOINT=$(df -P |grep -vE "^tmpfs|cdrom|tmp" | sed '1d' | awk '{print $6}' | sort -nr | sed -n -e '1{p;q}')
-  G_SPACESIZE=$(echo "$SPACESIZE/1000/1000/2" | bc -l)
-  echo $G_SPACESIZE
-  VOLSIZE=${G_SPACESIZE/.*}
-  echo $VOLSIZE
-  if [ $VOLSIZE -ge "1" ]; then
-    dd if=/dev/zero of=$MOUNTPOINT/cinder-volumes bs=1 count=0 seek="$VOLSIZE"G
-    losetup /dev/loop0 $MOUNTPOINT/cinder-volumes
-    pvcreate /dev/loop0
-    vgcreate cinder-volumes /dev/loop0  
-  else
-    echo "The current spare disk space only $SPACESIZE < 1G, no enough disk space is available for the cinder-volume"
-    exit 0
-  fi
-fi
-
diff --git a/chef/cookbooks/openstack-compute/templates/default/nova.conf.erb b/chef/cookbooks/openstack-compute/templates/default/nova.conf.erb
index 4845571..bf3f545 100644
--- a/chef/cookbooks/openstack-compute/templates/default/nova.conf.erb
+++ b/chef/cookbooks/openstack-compute/templates/default/nova.conf.erb
@@ -17,7 +17,7 @@ lock_path=/var/lock/nova
 ##### RABBITMQ #####
 rabbit_userid=<%= node['openstack']['mq']['user'] %>
 rabbit_password=<%= node['openstack']['mq']['password'] %>
-rabbit_virtual_host=<%= node["openstack"]["compute"]["rabbit"]["vhost"] %>
+# rabbit_virtual_host=<%= node["openstack"]["compute"]["rabbit"]["vhost"] %>
 <% if node["openstack"]["compute"]["rabbit"]["ha"] -%>
 rabbit_hosts=<%= @rabbit_hosts %>
 rabbit_ha_queues=True
diff --git a/chef/cookbooks/openstack-network/templates/default/plugins/openvswitch/ovs_quantum_plugin.ini.erb b/chef/cookbooks/openstack-network/templates/default/plugins/openvswitch/ovs_quantum_plugin.ini.erb
index 6c18a76..948991c 100644
--- a/chef/cookbooks/openstack-network/templates/default/plugins/openvswitch/ovs_quantum_plugin.ini.erb
+++ b/chef/cookbooks/openstack-network/templates/default/plugins/openvswitch/ovs_quantum_plugin.ini.erb
@@ -18,10 +18,12 @@ reconnect_interval = 2
 # Minimum number of SQL connections to keep open in a pool
 # sql_min_pool_size = 1
 # Maximum number of SQL connections to keep open in a pool
-sql_max_pool_size = 30
+sql_max_pool_size = 100
 # Timeout in seconds before idle sql connections are reaped
 # sql_idle_timeout = 3600
 
+sqlalchemy_pool_size = 100
+
 [OVS]
 # (StrOpt) Type of network to allocate for tenant networks. The
 # default value 'local' is useful only for single-box testing and
diff --git a/chef/cookbooks/openstack-network/templates/default/quantum.conf.erb b/chef/cookbooks/openstack-network/templates/default/quantum.conf.erb
index 09a703c..4a98f68 100644
--- a/chef/cookbooks/openstack-network/templates/default/quantum.conf.erb
+++ b/chef/cookbooks/openstack-network/templates/default/quantum.conf.erb
@@ -329,6 +329,5 @@ signing_dir = <%= node["openstack"]["network"]["api"]["agent"]["signing_dir"] %>
 # ===========  end of items for agent management extension =====
 
 [database]
-sql_max_pool_size=30
-
-#sqlalchemy_pool_size = 30
+#sql_max_pool_size=100
+#sqlalchemy_pool_size = 100