- Added support for asynchronous replication to a remote DC with processes in a single cluster. This improves on the asynchronous replication offered by fdbdr because servers can fetch data from the remote DC if all replicas have been lost in one DC.
- Added support for synchronous replication of the transaction log to a remote DC. This remote DC does not need to contain any storage servers, meaning you need much fewer servers in this remote DC.
- Transaction logs do not copy mutations from previous generations of transaction logs. (PR #339)
- Load balancing temporarily avoids communicating with storage servers that have fallen behind.
- Avoid assigning storage servers responsiblity for keys they do not have.
- Not all endpoint failures were reported to the failure monitor.
- Watches registered on a lagging storage server would take a long time to trigger.
- The cluster controller would not start a new generation until it recovered its files from disk.
- Does not support upgrades from any version older than 5.0.
- :doc:`5.1 (API Version 510) </old-release-notes/release-notes-510>`
- :doc:`5.0 (API Version 500) </old-release-notes/release-notes-500>`
- :doc:`4.6 (API Version 460) </old-release-notes/release-notes-460>`
- :doc:`4.5 (API Version 450) </old-release-notes/release-notes-450>`
- :doc:`4.4 (API Version 440) </old-release-notes/release-notes-440>`
- :doc:`4.3 (API Version 430) </old-release-notes/release-notes-430>`
- :doc:`4.2 (API Version 420) </old-release-notes/release-notes-420>`
- :doc:`4.1 (API Version 410) </old-release-notes/release-notes-410>`
- :doc:`4.0 (API Version 400) </old-release-notes/release-notes-400>`
- :doc:`3.0 (API Version 300) </old-release-notes/release-notes-300>`
- :doc:`2.0 (API Version 200) </old-release-notes/release-notes-200>`
- :doc:`1.0 (API Version 100) </old-release-notes/release-notes-100>`
- :doc:`Beta 3 (API Version 23) </old-release-notes/release-notes-023>`
- :doc:`Beta 2 (API Version 22) </old-release-notes/release-notes-022>`
- :doc:`Beta 1 (API Version 21) </old-release-notes/release-notes-021>`
- :doc:`Alpha 6 (API Version 16) </old-release-notes/release-notes-016>`
- :doc:`Alpha 5 (API Version 14) </old-release-notes/release-notes-014>`