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{"/COMMIT_MSG":[{"author":{"_account_id":679,"name":"Kevin L. Mitchell","email":"klmitch@mit.edu","username":"klmitch"},"change_message_id":"85aa0c81beffee574022250993e2008c4dea7f43","unresolved":false,"context_lines":[{"line_number":4,"context_line":"Commit:     Philip Schwartz \u003cphilip.schwartz@rackspace.com\u003e"},{"line_number":5,"context_line":"CommitDate: 2015-06-15 15:14:05 -0400"},{"line_number":6,"context_line":""},{"line_number":7,"context_line":"Added documentation around datanase upgrades"},{"line_number":8,"context_line":""},{"line_number":9,"context_line":"Listed the current process for upgrading the Nova database to allow for"},{"line_number":10,"context_line":"better understanding of what will be changing."}],"source_content_type":"text/x-gerrit-commit-message","patch_set":2,"id":"fa32b979_23325011","line":7,"updated":"2015-06-15 19:22:50.000000000","message":"s/datanase/database/ (femtonit)","commit_id":"9b0bc98e8ed07c7d746f4dbf74eeed5fc814e435"},{"author":{"_account_id":1653,"name":"garyk","email":"gkotton@vmware.com","username":"garyk"},"change_message_id":"6ea8157cffbb51a3bf0547b80f8a85b4b43c6dfb","unresolved":false,"context_lines":[{"line_number":4,"context_line":"Commit:     Philip Schwartz \u003cphilip.schwartz@rackspace.com\u003e"},{"line_number":5,"context_line":"CommitDate: 2015-06-16 00:44:59 -0400"},{"line_number":6,"context_line":""},{"line_number":7,"context_line":"Added documentation around datanase upgrades"},{"line_number":8,"context_line":""},{"line_number":9,"context_line":"Listed the current process for upgrading the Nova database to allow for"},{"line_number":10,"context_line":"better understanding of what will be changing."}],"source_content_type":"text/x-gerrit-commit-message","patch_set":4,"id":"fa32b979_bc9c25c1","line":7,"updated":"2015-06-16 10:47:14.000000000","message":"datanase \u003d\u003e database","commit_id":"99bb7934da26c9d606a745860ef0a96c91eba0d5"}],"doc/source/upgrade.rst":[{"author":{"_account_id":5441,"name":"Andrew Laski","email":"andrew@lascii.com","username":"alaski"},"change_message_id":"b1378be67948051be37415195a6a2ca3c5e8476f","unresolved":false,"context_lines":[{"line_number":41,"context_line":""},{"line_number":42,"context_line":"3. Online data migrations from inside Nova object source code."},{"line_number":43,"context_line":""},{"line_number":44,"context_line":"The first of these online data migrations were added with the flavor migration and are located in nova/objects/instance.py and is a special case as there was no required schema reductions for this to work."},{"line_number":45,"context_line":""},{"line_number":46,"context_line":""},{"line_number":47,"context_line":"Concepts"}],"source_content_type":"text/x-rst","patch_set":1,"id":"fa32b979_20324611","line":44,"range":{"start_line":44,"start_character":0,"end_line":44,"end_character":142},"updated":"2015-06-15 18:58:58.000000000","message":"I don\u0027t believe the flavor migration was a special case.  Not every data migration needs to be associated with a schema change.  There are a few examples of data migrations in the sqlalchemy-migrate migrations.","commit_id":"0609a035fd9273ce225834fedd522c0214c28a52"},{"author":{"_account_id":679,"name":"Kevin L. 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This included a transient migration of flavor"},{"line_number":59,"context_line":"    storage from one database location to another."},{"line_number":60,"context_line":""},{"line_number":61,"context_line":""},{"line_number":62,"context_line":"Concepts"},{"line_number":63,"context_line":"--------"},{"line_number":64,"context_line":""}],"source_content_type":"text/x-rst","patch_set":4,"id":"fa32b979_7cf45df1","line":61,"updated":"2015-06-16 10:47:14.000000000","message":"It may be worthwhile noting that downgrades are no longer supported. But that is another issue","commit_id":"99bb7934da26c9d606a745860ef0a96c91eba0d5"},{"author":{"_account_id":782,"name":"John Garbutt","email":"john@johngarbutt.com","username":"johngarbutt"},"change_message_id":"15c82e4207d72745e128bed806b6246ca2570c2e","unresolved":false,"context_lines":[{"line_number":58,"context_line":"    of Nova object version 1.18. This included a transient migration of flavor"},{"line_number":59,"context_line":"    storage from one database location to another."},{"line_number":60,"context_line":""},{"line_number":61,"context_line":""},{"line_number":62,"context_line":"Concepts"},{"line_number":63,"context_line":"--------"},{"line_number":64,"context_line":""}],"source_content_type":"text/x-rst","patch_set":4,"id":"fa32b979_7110fb01","line":61,"in_reply_to":"fa32b979_7cf45df1","updated":"2015-06-16 13:58:12.000000000","message":"+1 to gary\u0027s point here.","commit_id":"99bb7934da26c9d606a745860ef0a96c91eba0d5"},{"author":{"_account_id":782,"name":"John Garbutt","email":"john@johngarbutt.com","username":"johngarbutt"},"change_message_id":"881d2b87aa184161c005bc8f2f490ba557fb6682","unresolved":false,"context_lines":[{"line_number":36,"context_line":"Currently Nova has 2 types of database upgrades that are in use."},{"line_number":37,"context_line":""},{"line_number":38,"context_line":"#. 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