Kernel: Mainline Linux on the MikroTik RB3011, FS With Cloning, Intel Spying and Oracle Linux KVM
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Jonathan McDowell: Mainline Linux on the MikroTik RB3011
I upgraded my home internet connection to fibre (FTTP) last October. I’m still on an 80M/20M service, so it’s no faster than my old VDSL FTTC connection was, and as a result for a long time I continued to use my HomeHub 5A running OpenWRT. However the FTTP ONT meant I was using up an additional ethernet port on the router, and I was already short, so I ended up with a GigE switch in use as well. Also my wifi is handled by a UniFi, which takes its power via Power-over-Ethernet. That mean I had a router, a switch and a PoE injector all in close proximity. I wanted to reduce the number of devices, and ideally upgrade to something that could scale once I decide to upgrade my FTTP service speed.
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Which file systems support file cloning
OpenZFS isn’t part of the Linux kernel because of licensing issues, and that is unlikely to change. OpenZFS doesn’t support any of the relevant Linux syscalls for cloning files or blocks. It doesn’t offer a replacement for these syscalls on FreeBSD or Linux. (This is why there are no out-of-band deduplication tools for OpenZFS.)
Bcachefs isn’t in the kernel yet either, but it’s developed under a Linux-kernel compatible license with the ultimate goal of being merged into the kernel. It supports all the relevant Linux-specific syscalls for file cloning.
Over the last three years, Apple has switched all of its products to its new CoW-based Apple File System (APFS). Microsoft has decided to go in the opposite direction, and removed its copy-on-write file system, ReFS, from Windows 10 Professional in 2017. ReFS is now only available on Workstation and Server editions. ReFS was not suitable for use on Windows desktops anyway. This does leave Windows as the only computer operating system without a CoW file system.
I find file cloning fascinating, and I’ll explore several potential use cases for it in the coming weeks. Next up will be how you can identify a cloned file. Something that is surprisingly difficult because the file system doesn’t keep track of it.
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Intel Platform Monitoring Telemetry Appears Destined For Linux 5.10
As first outlined earlier this year, Intel has been working on the Linux support for Platform Monitoring Technology as a new hardware telemetry feature first introduced with new Tigerlake hardware. It's looking like the initial Intel PMT support will come with Linux 5.10 while further work is being prepared that builds off its foundation.
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Announcing updated Oracle Linux Templates for Oracle Linux KVM
Oracle is pleased to announce updated Oracle Linux Templates for Oracle Linux KVM and Oracle Linux Virtualization Manager.
Oracle Linux Templates for Oracle Linux KVM provide an innovative approach to deploying a fully configured software stack by offering pre-installed and pre-configured software images. Use of Oracle Linux Templates eliminates the installation and configuration costs, and reduces the ongoing maintenance costs helping organizations achieve faster time to market and lower cost of operations.
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New Oracle Linux Templates for Oracle Linux KVM and Oracle Linux Virtualization Manager supply powerful automation. These templates are built on cloud-init, the same technology used today on Oracle Cloud Infrastructure and includes improvements and regression fixes.
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