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Kernel: Linux 5.15, Linux 5.13, and Ongoing Work on Analyzing a High Rate of Paging

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Linux
  • Linux 5.15 Block Changes From Removing LightNVM To Fixing Up The Floppy Driver - Phoronix

    Linux block subsystem maintainer and I/O expert Jens Axboe sent in his set of feature pull requests today for the Linux 5.15 kernel cycle.

  • Linux 5.15 I/O Can Achieve Up To ~3.5M IOPS Per-Core - Phoronix

    In addition to the block subsystem changes submitted for the Linux 5.15 merge window, Jens Axboe also sent in a separate pull request for this new kernel cycle to provide support for bio recycling. In turn this can enhance the Linux I/O limits by around 10%.

    The feature pull request mailed out today adds support for bio recycling in order to quickly reuse the bio for high IOPS scenarios rather than having to go back through the slab allocator. This cache though only works for polled I/O scenarios due to not being IRQ safe. With less than 200 lines of new code, this bio recycling is wired up and support added to IO_uring for using this bio allocation cache.

  • Bootlin contributions to Linux 5.13

    After finally publishing about our Linux 5.12 contributions and even though Linux 5.14 was just released yesterday, it’s hopefully still time to talk about our contributions to Linux 5.13. Check out the LWN articles about the merge window to get the bigger picture about this release: part 1 and part 2.

    In terms of Bootlin contributions, this was a much more quiet release than Linux 5.12, with just 28 contributions.

  • Brendan Gregg: Analyzing a High Rate of Paging

    These are rough notes. A service team was debugging a performance issue and noticed it coincided with a high rate of paging. I was asked to help, and used a variety of performance tools to solve this including those that use eBPF and Ftrace. This is a rough post to share this old but good case study of using these tools, and to help justify their further development. No editing, spell checking, or comments. Mostly screenshots. ## 1. Problem Statement The microservice managed and processed large files, including encrypting them and then storing them on S3. The problem was that large files, such as 100 Gbytes, seemed to take forever to upload. Hours. Smaller files, as large as 40 Gbytes, were relatively quick, only taking minutes. A cloud-wide monitoring tool, Atlas, showed a high rate of paging for the larger file uploads:

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today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.