[Full Convert Enterprise 5.13 195
Addison Mauldin
This document provides guidance and an overview to high-level general features and updates for SUSE Linux Enterprise Server 12 SP5. Besides architecture or product-specific information, it also describes the capabilities and limitations of SUSE Linux Enterprise Server 12 SP5.
Release notes usually only list changes that happened between two subsequent releases.Certain important entries from the release notes of previous product versions are repeated.To make these entries easier to identify, they contain a note to that effect.
However, repeated entries are provided as a courtesy only.Therefore, if you are skipping one or more service packs, check the release notes of the skipped service packs as well.If you are only reading the release notes of the current release, you could miss important changes.
SUSE Linux Enterprise Server 12 SP5 is a highly reliable, scalable, and secure server operating system, built to power mission-critical workloads in both physical and virtual environments.It is an affordable, interoperable, and manageable open source foundation.With it, enterprises can cost-effectively deliver core business services, enable secure networks, and simplify the management of their heterogeneous IT infrastructure, maximizing efficiency and value.
The only enterprise Linux recommended by Microsoft and SAP, SUSE Linux Enterprise Server is optimized to deliver high-performance mission-critical services, as well as edge of network, and web infrastructure workloads.
Designed for interoperability, SUSE Linux Enterprise Server integrates into classical Unix and Windows environments, supports open standard interfaces for systems management, and has been certified for IPv6 compatibility.
This modular, general purpose operating system runs on four processor architectures and is available with optional extensions that provide advanced capabilities for tasks such as real time computing and high availability clustering.
SUSE Linux Enterprise Server is optimized to run as a high performing guest on leading hypervisors and supports an unlimited number of virtual machines per physical system with a single subscription. This makes it the perfect guest operating system for virtual computing.
Find more information in the docu directory of the installation medium of SUSE Linux Enterprise Server 12 SP5.This directory includes PDF versions of the SUSE Linux Enterprise Server 12 SP5 Installation Quick Start Guide.
SUSE Linux Enterprise Server 12 has a 13-year life cycle, with 10 years of General Support and 3 years of Extended Support.The current version (SP5) will be fully maintained and supported until 6 months after the end of the SUSE Linux Enterprise Server lifecycle. See for details.
If you need additional time to design, validate and test your upgrade plans, Long Term Service Pack Support can extend the support duration.You can buy an additional 12 to 36 months in twelve month increments.This means, you receive a total of 3 to 5 years of support per Service Pack.
Problem determination, which means technical support designed to provide compatibility information, usage support, ongoing maintenance, information gathering and basic troubleshooting using available documentation.
Problem isolation, which means technical support designed to analyze data, reproduce customer problems, isolate problem area and provide a resolution for problems not resolved by Level 1 or prepare for Level 3.
Certain software delivered as part of SUSE Linux Enterprise Server may require an external contract.Check the support status of individual packages using the RPM metadata that can be viewed with zypper.
Technology previews are packages, stacks, or features delivered by SUSEwhich are not supported.They may be functionally incomplete, unstable or in other ways not suitablefor production use.They are included for your convenience and give you a chance to test new technologies within an enterprise environment.
Whether a technology preview becomes a fully supported technology later depends on customer and market feedback.Technology previews can be dropped at any time and SUSE does not commit to providing a supported version of such technologies in the future.
schedutil is a CPU frequency scaling governor that makes decisions based on the utilization data provided by the scheduler, as opposed to other governors that use CPU idle time, such as ondemand.It was introduced in the Linux kernel version 4.7.However, it is only viable for production use together with an optimization called util_est (short for "utilization estimation") that makes it much more responsive.This optimization is only available in Linux kernel version 4.17 and newer.For this reason it is only offered as technology preview in SLE 12 SP5.
Modules are fully supported parts of SUSE Linux Enterprise Server with a different life cycle andupdate timeline.They are a set of packages, have a clearly defined scope and are delivered viaan online channel only.Release notes for modules are contained in this document.
Extensions add extra functionality to the system and require their own registration key, usually at additional cost.Extensions are delivered via an online channel or physical media.In many cases, extensions have their own release notes documents that are available from
Upgrading the system is only supported from the most recent patch level.Make sure the latest system updates are installed by either running zypper patch or by starting the YaST module Online-Update.An upgrade on a system not fully patched may fail.
SUSE Linux Enterprise Server JeOS is a slimmed down form factor of SUSE Linux Enterprise Server that is ready to run in virtualization environment and cloud.With SUSE Linux Enterprise Server JeOS, you can choose the right sized SUSE Linux Enterprise Server option to fit your needs.
We are providing different virtual disk images for JeOS, using the .qcow2, .vhdx, and .vmdk file formats respectively for KVM, Xen, OpenStack, Hyper-V, and VMware environments.All JeOS images are setting up the same disk size (24 GB) for the JeOS system but due to the nature of the different file formats, the size of the JeOS images are different.
Starting with SUSE Linux Enterprise Server 12 SP5, the JeOS images for Hyper-V and VMware using the .vhdx and .vmdk file formats respectively, are now compressed with the LZMA2 compression algorithm by default.Therefore, we are now delivering these images in an .xz file format, so youneed to decompress the image before using it in your Hyper-V or VMware environment by, for example, using the unxz command.
Having a firewall inside an instance is unnecessary and confusing in an OpenStack environment since OpenStack provides security and network capabilities on a different level.OpenStack, for instance, uses security groups which block any incoming connection (no ICMP, no UDP, no TCP) by default. The OpenStack Administrator needs to explicitely enable ICMP and TCP via the security groups configuration, to ping and ssh into an instance.
The official OpenStack recommendation for Linux-based images is to disable any firewalls inside the image (see -guide/openstack-images.html ), so we decided to remove the package firewalld from our OpenStack JeOS images.
With systemd-coredump as the default coredump handler, the coredumping logic on SUSE Linux Enterprise Server has been enabled for all services by default.systemd-coredump allows to store and manage the coredump in a more comprehensive and clean way.
Therefore the default size for core files has changed to unlimited.In previous versions of SUSE Linux Enterprise Server, the default size for core files was set to 0.To restore the previous behaviour, set
The packaged base container images like sles11sp4-docker-image and suse-sles12sp3-image that ship with the SLE 12 Containers module will not receive further updates.We recommend using the SUSE Linux Enterprise Server 12 SP3 and newer images that can be obtained through the Docker registry at
These analyses can be performed on a single image, or a diff can be performedon two images to compare. The tool helps to better understand what ischanging inside their images, and provides an overview of an image contains.
In SUSE Linux Enterprise Server 12 SP5, we are enabling the latest Python 3.6 development which also enables machine-learning applications.The Python 3.6 interpreter is shipped in the python36-base package.
The Intel Media Driver for VAAPI is a new VA-API (Video Acceleration API) user mode driver supporting hardware accelerated decoding, encoding, and video post processing for GEN based graphics hardware.
The Intel Media SDK provides a plain C API to access hardware-accelerated video decoding, encoding and filtering on Intel Gen graphics hardware platforms. the implementation is written in C++ 11 with parts in C-for-Media (CM).
SUSE Linux Enterprise was the first enterprise Linux distribution to support journaling file systems and logical volume managers back in 2000.Later, we introduced XFS to Linux, which today is seen as the primary work horse for large-scale file systems, systems with heavy load and multiple parallel reading and writing operations.With SUSE Linux Enterprise 12, we went the next step of innovation and started using the copy-on-write file system Btrfs as the default for the operating system, to support system snapshots and rollback.
3 Btrfs is a copy-on-write file system.Instead of journaling changes before writing them in-place, it writes them to a new location and then links the new location in.Until the last write, the changes are not "committed".Because of the nature of the file system, quotas are implemented based on subvolumes (qgroups).
Some file system features are available in SUSE Linux Enterprise Server 12 SP5 but are not supported by SUSE.By default, the file system drivers in SUSE Linux Enterprise Server 12 SP5 will refuse mounting file systems that use unsupported features (in particular, in read-write mode).To enable unsupported features, set the module parameter allow_unsupported=1 in /etc/modprobe.d or write the value 1 to /sys/module/MODULE_NAME/parameters/allow_unsupported.However, note that setting this option will render your kernel and thus your system unsupported.
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