1.8 Technology Preview

Features that are currently under technology preview when using UEK R4u2 are described in Oracle Linux Release Notes for Unbreakable Enterprise Kernel Release 4 Update 2.

Features that are currently under technology preview when using UEK R3QU7 are described in Oracle Linux Release Notes for Unbreakable Enterprise Kernel Release 3 Quarterly Update 7.

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.