- Dependency changes
- Added six requirement. This is part of an ongoing effort to add support for Python 3.
- Dropped support for Python 2.6.
- Config changes
- Recent versions of Python restrict the number of headers allowed in a request to 100. This number may be too low for custom middleware. The new "extra_header_count" config value in swift.conf can be used to increase the number of headers allowed.
- Renamed "run_pause" setting to "interval" (current configs with run_pause still work). Future versions of Swift may remove the run_pause setting.
- The versioned writes feature has been refactored and reimplemented as middleware. You should explicitly add the versioned_writes middleware to your proxy pipeline, but do not remove or disable the existing container server config setting ("allow_versions"), if it is currently enabled. The existing container server config setting enables existing containers to continue being versioned. Please see http://swift.openstack.org/middleware.html#how-to-enable-object-versioning-in-a-swift-cluster for further upgrade notes.
