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+# Changes in catlfish 0.10.0 - 2017-02-11
+
+## Incompatible changes
+
+- Local configuration files need two new settings: 'configurl' and
+  'logadminkey'. The former is where the log administrator publishes
+  the (generated) global config file and the latter can be found in
+  that file.
+
+- The configuration setting 'publicaddresses', used by frontend nodes,
+  has changed to 'ctapiaddresses'.
+
+- The configuration setting 'known_roots' in merge configuration files
+  has changed to 'knownroots' to match what's being used by all other
+  nodes types.
+
+  It should be noted that regeneration of Erlang config files is
+  necessary when upgrading to 0.10.0 from a previous version.
+
+  This is indeed recommended for every release, and even recommended
+  to be done before restarting of nodes, in order to take advantage of
+  the new config management system.
+
+## Features
+
+- A new database backend, permdb, has been added. This is the
+  recommended backend.
+
+- Support for managing log configuration and log keys has been
+  added. Most notably, the log API keys have moved into the global
+  configuration file and a new logadmin key is used by the log owner
+  to sign that file. Node operators should regularly download the
+  global config, verify it and use it together with local config to
+  generate the Erlang config files used by the system (closes
+  CATLFISH-77).
+
+- Many configuration options can now be reloaded without restarting
+  a node (closes CATLFISH-32).
+
+## Improvements
+
+- Most of the merge process has been parallelised. It's now possible
+  to add both new frontend nodes and new secondary merge nodes to a
+  running log without risking long delays in publishing of new STH's
+  (closes CATLFISH-88).
+
+- Tooling both for initiating a log instance and for promoting a
+  secondary merge node to primary in an existing log instance has been
+  added.
+
+- The tests now do a better job at testing the merge failover case.
+
 # Changes in catlfish 0.9.0 - 2016-12-04
 
 ## Features