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Servers: ZFS Tuning for HPC, Rancher 2.4, QEMU, LXD and Kubernetes

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  • ZFS Tuning for HPC

    If you manage storage servers, chances are you are already aware of ZFS and some of the features and functions it boasts. In short, ZFS is a combined all-purpose filesystem and volume manager that simplifies data storage management while offering some advanced features, including drive pooling with software RAID support, file snapshots, in-line data compression, data deduplication, built-in data integrity, advanced caching (to DRAM and SSD), and more.

    ZFS is licensed under the Common Development and Distribution License (CDDL), a weak copyleft license based on the Mozilla Public License (MPL). Although open source, ZFS and anything else under the CDDL was, and supposedly still is, incompatible with the GNU General Public License (GPL). This hasn’t stopped ZFS enthusiasts from porting it over to the Linux kernel, where it remains a side project under the dominion of the ZFS on Linux (ZoL) project.

  • From Web Scale to Edge Scale: Rancher 2.4 Supports 2,000 Clusters on its Way to 1 Million

    Rancher 2.4 is here – with new under-the-hood changes that pave the way to supporting up to 1 million clusters. That’s probably the most exciting capability in the new version. But you might ask: why would anyone want to run thousands of Kubernetes clusters – let alone tens of thousands, hundreds of thousands or more? At Rancher Labs, we believe the future of Kubernetes is multi-cluster and fully heterogeneous. This means ‘breaking the monolith’ into many clusters and running the best Kubernetes distribution for each environment and use case.

  • QEMU 5.0-rc1 Released For Linux Virtualization With The Stable Update Coming This Month

    QEMU 5.0-rc1 was released on Tuesday as the latest development release in the path to QEMU 5.0.0 expected to be achieved later this month.

  • New 4.0 LTS releases for LXD, LXC and LXCFS
    The LXD, LXC and LXCFS teams are very proud to announce their 4.0 LTS releases!
    LTS versions of all 3 projects are released every 2 years, starting 6
    years ago. Those LTS versions benefit from 5 years of security and
    bugfix support from upstream and are ideal for production environments.
    # LXD
    LXD is our system container and virtual machine manager. It's a Go
    application based on LXC and QEMU. It can run several thousand
    containers on a single machine, mix in some virtual machines, offers a
    simple REST API and can be easily clustered to handle large scale
    It takes seconds to setup on a laptop or a cloud instance, can run just
    about any Linux distribution and supports a variety of resource limits
    and device passthrough. It's used as the basis for Linux applications on
    Chromebooks and is behind Travis-CI's recent Arm, IBM Power and IBM Z
    testing capability.
  • Building a Three-Node Kubernetes Cluster | Quick Guide

    There are many ways to build a Kubernetes cluster. One of them is using a tool called kubeadm. Kubeadm is the official tool for “first-paths” when creating your first Kubernetes cluster. With the ease of getting up and running, I thought I would put together this quick guide to installing a Kubernetes cluster using kubeadm!

  • Kubernetes Topology Manager Moves to Beta - Align Up!

    This blog post describes the TopologyManager, a beta feature of Kubernetes in release 1.18. The TopologyManager feature enables NUMA alignment of CPUs and peripheral devices (such as SR-IOV VFs and GPUs), allowing your workload to run in an environment optimized for low-latency.

    Prior to the introduction of the TopologyManager, the CPU and Device Manager would make resource allocation decisions independent of each other. This could result in undesirable allocations on multi-socket systems, causing degraded performance on latency critical applications. With the introduction of the TopologyManager, we now have a way to avoid this.

LXD 4.0 LTS Released

  • LXD 4.0 LTS Released For Offering The Latest Linux Containers Experience

    Ahead of the Ubuntu 20.04 LTS release later this month, the Canonical folks working on LXD for Linux containers and VMs have released LXD 4.0 LTS.

    LXD 4.0 LTS is offering up the latest Linux containers experience and in great shape for Ubuntu 20.04 LTS. Some of the highlights for LXD 4.0 include:

    - Support for backing up of virtual machines using lxc export and lxc import, similar to existing container backup functionality.

  • LXD 4.0 LTS has been released

    The LXD team is very excited to announce the release of LXD 4.0 LTS!

    This is the 3rd LTS release for LXD and a very busy and exciting one!
    The changelog below is split so that both users of LXD 3.23 and LXD 3.0 can see what we have in store for them.

    As with all our other LTS releases, this one will be supported for 5 years (June 2025) and will receive a number of bugfix and security point releases over that time.

    As for LXD 3.0, we’re hoping to release one last bugfix release as 3.0.5 in the near future before we enter security-only maintenance mode for its remaining 3 years.

LXD 4.0 LTS stable release is now available

  • LXD 4.0 LTS stable release is now available

    The stable release of LXD, the machine container hypervisor, is now available. LXD 4.0 is the third LTS release for LXD and will be supported for 5 years, until June 2025. This version comes with a significant amount of new features including adding virtual machines (VMs) support, the introduction of projects and improved networking, storage and security capabilities.

Canonical releases LXD 4.0 LTS machine container hypervisor

  • Canonical releases LXD 4.0 LTS machine container hypervisor

    Canonical, the company behind the popular Linux distribution Ubuntu, has announced the availability of LXD 4.0 LTS, its machine container hypervisor. This is the third long-term support release of LXD and will receive updates for five years until June 2025. This update includes improved networking, storage, and security features.

    One of the new features in this update is support for adding virtual machines. The firm said that VM images are available for most common Linux distributions but that more will be added in the future. Until now, LXD focused on containers, with the introduction of VM support, Canonical says it wants to give users a similar experience whether they choose to use a container or a virtual machine.

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