Fix the argument for cinder-manage command.
Correct argument is online_data_migrations, not online-data-migrations.
@@ -52,7 +52,7 @@ migrations are banned from schema migration scripts. Instead, the migrations
should be done by background process in a manner that doesn't interrupt running
services (you can also execute online data migrations with services turned off
if you're doing a cold upgrade). In Ocata a new ``cinder-manage db
-online-data-migrations`` utility was added for that purpose. Before upgrading
+online_data_migrations`` utility was added for that purpose. Before upgrading
Ocata to Pike, you need to run this tool in the background, until it tells you
no more migrations are needed. Note that you won't be able to apply Pike's
schema migrations before completing Ocata's online data migrations.
@@ -237,7 +237,7 @@ After maintenance window
be supported for one cycle, but should be removed before your next
upgrade is performed.
-* Since Ocata, you also need to run ``cinder-manage db online-data-migrations``
+* Since Ocata, you also need to run ``cinder-manage db online_data_migrations``
command to make sure data migrations are applied. The tool let's you limit
the impact of the data migrations by using ``--max_number`` option to limit
number of migrations executed in one run. You need to complete all of the
