On behalf of the SPDK community I'm pleased to announce the release of SPDK 21.04! This release contains the following new features: - ZNS NVMe bdev: Added support for zoned namespaces to the NVMe bdev module. This builds on the work to support zoned namespaces in the NVMe driver in the previous release. - NVMe PMR: Added support for the Persistent Memory Region feature to NVMe driver. - NVMe-oF ADQ: Added support for Application Device Queues (ADQ) to the NVMe-oF TCP initiator. - RPM: Added script for building SPDK RPM packages. See https://spdk.io/doc/rpms.html. Users updating from the previous release should note that a large number of deprecated APIs have been removed. The process for deprecation has been formalized in https://spdk.io/doc/deprecation.html, where a list of deprecation notices for future releases can be found. The full changelog for this release is available at: https://github.com/spdk/spdk/releases/tag/v21.04 This release contains 730 commits from 49 authors with over 29k lines of code changed. We'd especially like to recognize all of our first time contributors: Chengqiang Meng Dantali0n G Balaji Jaylyn Ren Klaus Jensen Krishna Kanth Reddy Maciej Szulik Matthew King Thanos Makatos Thanks to everyone for your contributions, participation, and effort! Thanks, Tomek