diff --git a/script/tricircle.cfg b/script/tricircle.cfg
index d38d99e4..3fbcc95c 100755
--- a/script/tricircle.cfg
+++ b/script/tricircle.cfg
@@ -1,7 +1,13 @@
 [glance-api]
+#Configured to indicate if using the glance sync manager.
 sync_enabled=True
+
+#The glance sync manager api address(host + port).
 sync_server_port=9595
 sync_server_host=127.0.0.1
+
+#This option's value must be True if using glance sync feature,
+#for sync using glance's multiple-locations feature.
 show_multiple_locations=True
 
 [glance-api_keystone_authtoken]
@@ -13,8 +19,20 @@ admin_user=glance
 admin_password=openstack
 
 [glance-sync]
+#How to sync the image, the value can be ["None", "ALL", "USER", "nova"]
+#When "ALL" chosen, means to sync to all the cascaded glances;
+#When "USER" chosen, means according to user's role,
+#project, etc (not implemen                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 tation);
+#When "nova" chosen, means nova sync the image when first time it
+#create a instance.
 sync_strategy=All
+
+#What the cascading glance api endpoint is, must be same with what is
+#in keystone's endpoint list.
 cascading_endpoint_url=http://<glance-endpoint-url>/
+
+#When create instance's snapshot image, indicate which regions the snapshot
+#should to be synced.
 snapshot_region_names=<region_names(A, B...) for vm snapshot>
 
 [glance-sync_keystone_authtoken]
@@ -24,21 +42,55 @@ admin_user=glance
 admin_password=openstack
 
 [nova]
+#Modify to not wait neutron creating the vif.
 vif_plugging_timeout=0
 vif_plugging_is_fatal=False
+
+#Config the admin user of nova for sync info.
 nova_admin_username=admin
 nova_admin_password=openstack
 nova_admin_tenant_name=admin
+
+#The underlying openstack's region name that this proxy service manages.
 proxy_region_name=<CascadedRegion>
+
+#The cascading nova api address.
 cascading_nova_url=http://127.0.0.1:8774/v2
+
+#The underlying nova restful api address for proxy to call.
 cascaded_nova_url=http://127.0.0.1:8774/v2
+
+#The underlying neutron restful api address for proxy to call.
 cascaded_neutron_url=http://127.0.0.1:9696
+
+#The flag to show whether using glance cascade.
 cascaded_glance_flag=True
+
+#If using glance cascade, the underlying glance restful api address
+#for proxy to call.
 cascaded_glance_url=http://127.0.0.1:9292
+
+#The region name this proxy belongs to.
 os_region_name=<CascadingRegion>
+
+#The keystone auth url
 keystone_auth_url=http://127.0.0.1:5000/v2.0/
+
+#The Cinder endpoint template.
 cinder_endpoint_template=http://127.0.0.1:8776/v2/%(project_id)s
+
+#The ComputeManger Implementation
 compute_manager=nova.compute.manager_proxy.ComputeManager
+
+#The time interval to sync aggregate info from underlying to cascading.
+sync_aggregate_info_interval = 1800
+
+#Whether sync resources from underlying to cascading.
+resource_tracker_synced = False
+
+#If using the feature that syncing the image when first time launch instance,
+#these options must to configured for how to copy the image data from the
+#source to the dest using ssh/scp command.
 image_copy_dest_location_url=file:///var/lib/glance/images
 image_copy_dest_host=127.0.0.1
 image_copy_dest_user=glance