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Why ARM Servers, And Why Now?

Filed under
Server
OSS

Red Hat and Canonical are doing a lot of the work to get the KVM hypervisor running properly on 64-bit ARM and Citrix Systems is also working to get the Xen hypervisor, which is the preferred virtualizer on Linux-based public clouds (Amazon Web Services, Rackspace Hosting, and IBM SoftLayer all use a variant of Xen; it is not clear what Google uses and Microsoft clearly uses Hyper-V). Stephano Stabellini, senior principal software engineer at Citrix, explained that Xenon ARM was a “lean and simple architecture” that “removed all of the cruft accumulated over the years” in the X86 implementation of Xen. The ARM variant of Xen has no emulation and does not make use of QEMU, and it only provides one type of guest, which combines the two options available on X86 machinery. (That would be the full virtualization of a Hardware Virtual Machine and the partial virtualization available through Para-Virtualization).

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Containers bring a skinny new world of virtualization to Linux

Filed under
GNU
Linux
Server

Once upon a time, if you ran a data center, you used virtual machine (VM) management programs (i.e., hypervisors) There was no other practical choice. This dates all the way back to the good old IBM 360 mainframe days with CP-67/CMS in 1967. Today, our data centers and clouds run more advanced hypervisors. Amazon Web Services (AWS), for example, is made up of nearly half-a-million Linux servers running the Xen hypervisor, while Microsoft's Azure cloud relies upon its Hyper-V hypervisor.

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Cern expands open source system use with Red Hat

Filed under
Red Hat
Server

Cern, the European Organisation for Nuclear Research, has deployed open source Red Hat systems for mission-critical applications.

Last year, Cern said it was in the middle of expanding its IT infrastructure to accommodate the growing amount of data being produced by its Large Hadron Collider (LHC) in Geneva, Switzerland.

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Red Hat Enterprise Linux 7.0 RC Benchmarks

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Graphics/Benchmarks
Red Hat
Server

The distributions included:

Oracle Linux 6.5 - Oracle's spin of the Red Hat Enterprise Linux 6.5 source tree.

Oracle Linux 7.0 Beta 1 - Oracle's spin of the earlier RHEL 7.0 Beta 1 source code.

CentOS 6.5 - The community spin of RHEL 6.5 that is now collaborating with upstream Red Hat Enterprise Linux.

Fedora 20 - The out-of-the-box Fedora 20 for the latest experience of the Red Hat sponsored distribution

RHEL 7.0 RC1 - The just-released public ISO of the new Red Hat Enterprise Linux 7.0 environment.

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OpenPOWER Foundation to reveal innovations in Big Data

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Server

The OpenPOWER Foundation is going to reveal new innovations around Big Data technology in the next Open Innovation Summit on April 23, 2014. The OpenPOWER Foundation is a collaboration of technology companies on Power Architecture products initiated by IBM. It is building an ecosystem around IBM POWER hardware and software and making it available for open development for the first time. Canonical has also added support for PowerSystems in the recently released Ubuntu Linux 14.04.

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Oracle updates users on Heartbleed progress

Filed under
Red Hat
Server
Security

The Heartbleed fallout continues, but enterprise customers can draw some comfort from the fact that the companies that keep them in software are clearly as concerned as they are. For example, Oracle Corp. has announced mostly good, some bad and a bit of ugly news when it comes to security holes in its products.

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Leveraging Cloud, Open Source To Aid Embattled IT

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Server
OSS

IT executives laid out the challenges and opportunities created by cloud computing, open source, and other disruptive technologies during this week’s Red Hat summit in San Francisco.

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Ubuntu 12.04 LTS vs. 14.04 LTS Cloud Benchmarks

Filed under
Graphics/Benchmarks
Server
Ubuntu

These regressions are a bit frightening but we are still in the process of conducting further tests -- both bare metal and in the public clouds -- to try to figure out more closely what's going on. However, for most users I wouldn't hold off on upgrading to Ubuntu 14.04 LTS since it will ultimately be needed for the longest support within enterprise environments, for desktop users there are plenty of new features, the hardware enablement is much better on 14.04 LTS, the open-source graphics stack is much better, and there's many other non-performance advantages in using Ubuntu 14.04 LTS.

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Opteron X Berlin runs Fedora Linux

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Red Hat
Server
Hardware

  • Opteron X Berlin runs Fedora Linux

    Berlin is the first 28nm-based CPU and APU product from AMD for the Opteron server market and this APU is supposed to replace Opteron 3300 series based on 4 to 8 Piledriver cores. Berlin has four Steamroller cores, but its APU supports HSA and it theoretically should be able to run some parallel computing applications much faster.

  • AMD Shows Off x86 APU Server Running Fedora Linux
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More in Tux Machines

XFS - Online Filesystem Checking

Since Linux 4.17, I have been working on an online filesystem checking feature for XFS. As I mentioned in the previous update, the online fsck tool (named xfs_scrub) walks all internal filesystem metadata records. Each record is checked for obvious corruptions before being cross-referenced with all other metadata in the filesystem. If problems are found, they are reported to the system administrator through both xfs_scrub and the health reporting system. As of Linux 5.3 and xfsprogs 5.3, online checking is feature complete and has entered the stabilization and performance optimization stage. For the moment it remains tagged experimental, though it should be stable. We seek early adopters to try out this new functionality and give us feedback. Read more

Linux 5.5 RC7

  • Linux 5.5-rc7
    Well, things picked up at the end of the week, with half of my merges
    happening in the last two days.
    
    Whether that is the usual "send the weeks work to Linus on Friday", or
    a sign that things are just picking up in general after the holidays,
    I don't know.  If the former, I'll probably just release the final 5.5
    next week. But if it looks like there's pent-up fixes pending next
    week, I'll make another rc.
    
    Nothing in here looks particularly odd. Drivers is about half of the
    patch (networking, sound, gpio, gpu, scsi, usb, you name it), with the
    rest being the usual mix - arch, networking, filesystems, core
    kernel..  The diffstat looks mostly fairly nice and flat, with a
    couple of exceptions that look harmless (a few device tree file
    updates, some pure code movemment, and a couple of driver fixes that
    ended up changing calling conventions to get done and as a result got
    to be more lines than the bug otherwise would have merited).
    
    Please do test, there should be nothing scary going on.
    
                  Linus
    
  • Kernel prepatch 5.5-rc7

    The 5.5-rc7 kernel prepatch is out. Linus is still unsure whether the final 5.5 release will come out next week or not: "if it looks like there's pent-up fixes pending next week, I'll make another rc".

  • Linux 5.5-rc7 Kernel Released

    The seventh weekly release candidate to Linux 5.5 is now available for testing. Linus noted with Linux 5.5-rc7 there was a large uptick in patch volume at week's end. "Well, things picked up at the end of the week, with half of my merges happening in the last two days." Due to the recent holidays in large part, it's possible an eighth release candidate may be needed for Linux 5.5 before then releasing the kernel as stable on 2 February. However, in today's 5.5-rc7 announcement, Torvalds noted he may just end up releasing 5.5 stable next week. In any case, the release of Linux 5.5 is right on the horizon and this should be the kernel powering Ubuntu 20.04 LTS and other upcoming distribution releases.

GNU Make 4.3 Released!

The next stable version of GNU make, version 4.3, has been released and is available for download from https://ftp.gnu.org/gnu/make/ Please see the NEWS file that comes with the GNU make distribution for details on user-visible changes. Read more Also: GNU Make 4.3 Released With Performance Improvements, Newer GNU libc + Musl Support

Kernel: Zhaoxin, Arch Linux's Zen and WireGuard in Linux 5.6

  • Zhaoxin 7-Series x86 CPUs Mitigated For Spectre V2 + SWAPGS

    When it comes to the Zhaoxin x86-compatible processors coming out of VIA's joint venture in Shanghai, their forthcoming 7-series (KX-7000) has hardware mitigations in place for some CPU vulnerabilities. We haven't heard much about these Chinese x86 CPUs with regards to speculative execution vulnerabilities but it appears the pre-7-Series is vulnerable to Spectre Variant Two and at least SWAPGS. But with their 7-series, hardware mitigations appear to be in place.

  • Benchmarks Of Arch Linux's Zen Kernel Flavor

    Following the recent Linux kernel tests of Liquorix and other scheduler discussions (and more), some requests from premium supporters rolled in for seeing the performance of Arch Linux's Zen kernel package against the generic kernel. Here are those benchmark results. These are some benchmarks I recently did on the AMD Ryzen Threadripper 3970X while running EndeavourOS. Tests were done with its default Linux 5.4.8-arch1 kernel compared to the same kernel revision but using Arch's Zen kernel flavor. That is Arch's spin of the Zen-kernel patches (not to be confused with AMD Zen).

  • Intel's ConnMan Is Ready With WireGuard Support

    In addition to NetworkManager having good WireGuard support in advance of this secure VPN tunnel tech landing with the Linux 5.6 kernel, Intel's ConnMan software is also ready with supporting WireGuard. Intel's ConnMan hasn't seen a new tagged release in nearly one year but over the past two months in the Git development code WireGuard support has materialized. ConnMan, as a reminder, is the Intel-led effort for providing an Internet connection manager on Linux designed for embedded/mobile use-cases that dates back to their Moblin days.