---
features:
 - >
   Object versioning now supports a "history" mode in addition to
   the older "stack" mode. The difference is in how DELETE requests
   are handled. For full details, please read
   https://docs.openstack.org/swift/latest/overview_object_versioning.html.
 - >
   New config variables to change the schedule priority and I/O
   scheduling class. Servers and daemons now understand
   `nice_priority`, `ionice_class`, and `ionice_priority` to
   schedule their relative importance. Please read
   https://docs.openstack.org/swift/latest/deployment_guide.html
   for full config details.
 - >
   On newer kernels (3.15+ when using xfs), Swift will use the O_TMPFILE
   flag when opening a file instead of creating a temporary file
   and renaming it on commit. This makes the data path simpler and
   allows the filesystem to more efficiently optimize the files on
   disk, resulting in better performance.
 - >
   Erasure code GET performance has been significantly
   improved in clusters that are not completely healthy.
 - >
   Significant improvements to the api-ref doc available at
   https://developer.openstack.org/api-ref/object-storage/.
 - >
   A PUT or POST to a container will now update the container's
   Last-Modified time, and that value will be included in a
   GET/HEAD response.
 - >
   Include object sysmeta in POST responses. Sysmeta is still
   stripped from the response before being sent to the client, but
   this allows middleware to make use of the information.
upgrade:
 - >
   Update dnspython dependency to 1.14, removing the need to have
   separate dnspython dependencies for Py2 and Py3.
 - >
   Deprecate swift-temp-url and call python-swiftclient's
   implementation instead. This adds python-swiftclient as an
   optional dependency of Swift.
 - >
   Moved other-requirements.txt to bindep.txt. bindep.txt lists
   non-python dependencies of Swift.
fixes:
 - >
   Fixed a bug where a container listing delimiter wouldn't work
   with encryption.
 - >
   Fixed a bug where some headers weren't being copied correctly
   in a COPY request.
 - >
   Container sync can now copy SLOs more efficiently by allowing
   the manifest to be synced before all of the referenced segments.
   This fixes a bug where container sync would not copy SLO manifests.
 - Fixed a bug where some tombstone files might never be reclaimed.
other:
  - Various other minor bug fixes and improvements.