Swordfish v.1.2.6 offers key features such as new metrics for FileSystem, StoragePool, StorageService, and enhancements to VolumeMetrics. It introduces new mapping and masking models using Connections in the Fabric model and deprecates StorageGroups. It also includes support for new volume properties: ProvidingStoragePool, ChangeStripSize, Asymmetric Logical Unit Access (ALUA) to manage reservations. Swordfish v.1.2.6 adds enhancements to NVMe Domain Management, including ALUA support. Finally, it offers updates to NVMe namespaces, such as simplified Logical Block Address (LBA) Format representation and multiple namespace management.