1.8 Technology Preview

Features that are currently under technology preview when using UEK R4u2 are described in the release notes at Unbreakable Enterprise Kernel Documentation

Features that are currently under technology preview when using UEK R3QU7 are described in the release notes at Unbreakable Enterprise Kernel Documentation

For the RHCK, the following features are currently under technology preview:

  • Systemd:

    • Importd features for container image imports and exports

  • File Systems:

    • DAX (Direct Access) for direct persistent memory mapping from an application. This is under technical preview for the ext4 and XFS file systems.

    • Block and object storage layouts for parallel NFS (pNFS).

    • SCSI layout for parallel NFS (pNFS), including support for both client and server configurations.

    • OverlayFS remains in technical preview.

    • btrfs file system. Oracle supports btrfs with UEK R3 and UEK R4.

  • Kernel:

    • Heterogeneous memory management (HMM).

    • Usernamespace (security features for isolating Linux containers from the host).

    • 10GbE RoCE Express for RDMA.

    • ocrdma and libocrdma packages for RDMA over RoCE.

    • No-IOMMU mode virtual I/O feature.

  • Networking

    • Support for a Cisco proprietary User Space Network Interface Controller in UCM servers provided in the libusnic_verbs driver

    • Cisco VIC InfiniBand kernel driver that provides similar functionality to RDMA on proprietary Cisco architectures.

    • Trusted Network Connect.

    • Single-Root I/O virtualization (SR-IOV) in the qlcnic driver.

    • nftables and libnftnl network filtering and classification functionality

  • Storage

    • LVM2 support for RAID-level takeover (striped RAID4, linear RAID1 and mirror RAID1)

    • Multi-queue I/O scheduling for SCSI (scsi-mq). This functionality is disabled by default.

    • The plug-in for the libStorageMgmt API used for storage array management. The libStorageMgmt API is now fully supported, but the plugin is under technology preview.

    • DIF/DIX for data integrity checking on SCSI devices other than certain, specified native HBA and storage hardware. Oracle supports DIF/DIX with UEK R3 and UEK R4.