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Reiser

Reiser4 Brought To The Linux 5.0 Kernel

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Reiser

For those still using the out-of-tree Reiser4 file-system, it may be about time to consider alternatives like Btrfs, XFS, ZFS On Linux, F2FS, or even the likes of Stratis and Bcachefs. But should you still be using this once promising file-system, the out-of-tree patches have been revised to now work with the Linux 5.0 kernel.

There still is no trajectory for Reiser4 to the mainline Linux kernel with no major companies or other stakeholders backing Reiser4 but just a small group of developers and enthusiasts left working on this successor to ReiserFS. With the latest code posted on Friday by former Namesys developer Edward Shishkin, the Reiser4 kernel driver has been re-based to the Linux 5.0 kernel but with no other changes to the file-system noted.

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Reiser4 File-System Benchmarks With Linux 4.17

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Graphics/Benchmarks
Linux
Reiser

It's been about three years since last carrying out any file-system performance benchmarks of Reiser4, but being curious how it stacks up against the current state of today's mainline Linux file-systems, here are some fresh performance tests of Reiser4 using the Linux 4.17 kernel. The Reiser4 performance was compared to Reiserfs, EXT4, Btrfs, XFS, and F2FS.

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Reiser4 Updated For Linux 4.14 & Introduces Zstd Compression Support

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Reiser

The out-of-tree Reiser4 file-system driver has been updated with compatibility for the latest Linux 4.14 stable series. Besides reworking the code to run on Linux 4.14, this controversial file-system has also added support for Zstd file-system compression.

Linux 4.14 introduced Zstd support in the mainline kernel and wired it in for SquashFS and Btrfs. Our Btrfs Zstd benchmarks have been promising for transparent file-system compression compared to the other supported algorithms. Reiser4 has now picked up Zstd compression as an eventual replacement to their Gzip compression support.

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Reiser4 Is Now Ready For Linux 4.13

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Reiser

For those wanting to use the Reiser4 file-system with the just-released Linux 4.13 kernel, patches are already available.

Less than one week after the release of the Linux 4.13 stable kernel, Edward Shishkin has already released an updated patch for the out-of-tree Reiser4 file-system for working with this new stable series.

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Reiser4 Updated For Linux 4.12, Experimental Data Striping Support

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Reiser

Those using the Reiser4 file-system in some capacity can now safely upgrade to the Linux 4.12 kernel.

Edward Shishkin has updated this out-of-tree file-system for the Linux 4.12 kernel so it can be built with the latest mainline stable release.

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Reiser4 Updated For The Linux 4.10 Kernel

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Reiser

The out-of-tree Reiser4 file-system has been updated for the Linux 4.10 kernel.

Reiser4 for the Linux 4.10.0 kernel is available as of earlier this week, managing to release their updated file-system driver code quite promptly. This port to Linux 4.10 yielded a few changes to the Reiser4 code as they re-based to this Linux kernel with the ->readlink() of inode operations being removed as well as the WRITE_FLUSH_FUA flag being removed.

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Reiser4 Is Now Available For Linux 4.9, Mirror Code Almost Stable

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Reiser

For those that haven't yet switched to Btrfs, ZFS On Linux, or running EXT4/XFS but holding out hope for Reiser4, this out-of-tree file-system code has been updated for Linux 4.9.

Reiser4 was released for Linux 4.9.0 last weekend but then a revised patch series came out three days ago to fix some problems with this port to 4.9. With the new Reiser4 patches built against Linux 4.9.1, all should be well if you want to use this experimental file-system on the newest Linux kernel.

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Reiser4 Now Available For Linux 4.8 Kernel

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Reiser

While Linux 4.9 will be released in just a few weeks, the remaining Reiser4 file-system developers have just updated their code to support the Linux 4.8 stable kernel.

Reiser4 for Linux 4.8.0 is now available for those wanting to run this out-of-tree file-system on the current stable kernel. The Reiser4 kernel is now compatible with 4.8 and there is also a kernel oops fix when mounting forward-incompatible volumes, unneeded assertions were removed, some VFS changes were made, and there is now rename2 support.

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Reiser4 Implements Mirror & Failover Support

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Reiser

Edward Shishkin, one of the last remaining Reiser4 developers and the one who has been leading this out-of-tree file-system the past few years, has implemented logical volumes support with support for mirrors (in effect, RAID 0) and failover support at the file-system level.

Shishkin quietly announced on Sunday, "Reiser4 will support logical (compound) volumes. For now we have implemented the simplest ones - mirrors. As a supplement to existing checksums it will provide a failover - an important feature, which will reduce number of cases when your volume needs to be repaired by fsck."

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Reiser4 Now Has Support For The Linux 4.7 Kernel

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Reiser

The Reiser4 file-system now has support for the latest stable Linux kernel series, Linux 4.7.

Released this morning by Edward Shishkin was the updated Reiser4 file-system driver patch that provides compatibility for Linux 4.7.0. The only other change besides porting over to Linux 4.7 is a small returned optimization.

There's been no talk in a few years about attempting to mainline the Reiser4 file-system in the Linux kernel. Thus for now if you want to try out this once-promising file-system, swing by SourceForge to patch your kernel.

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More in Tux Machines

Programming: Python, LLVM and Erlang

  • Sending Emails in Python — Tutorial with Code Examples

    What do you need to send an email with Python? Some basic programming and web knowledge along with the elementary Python skills. I assume you’ve already had a web app built with this language and now you need to extend its functionality with notifications or other emails sending. [...] Sending multiple emails to different recipients and making them personal is the special thing about emails in Python. To add several more recipients, you can just type their addresses in separated by a comma, add Cc and Bcc. But if you work with a bulk email sending, Python will save you with loops. One of the options is to create a database in a CSV format (we assume it is saved to the same folder as your Python script). We often see our names in transactional or even promotional examples. Here is how we can make it with Python.

  • Binning Data with Pandas qcut and cut

    When dealing with continuous numeric data, it is often helpful to bin the data into multiple buckets for further analysis. There are several different terms for binning including bucketing, discrete binning, discretization or quantization. Pandas supports these approaches using the cut and qcut functions. This article will briefly describe why you may want to bin your data and how to use the pandas functions to convert continuous data to a set of discrete buckets. Like many pandas functions, cut and qcut may seem simple but there is a lot of capability packed into those functions. Even for more experience users, I think you will learn a couple of tricks that will be useful for your own analysis. [...] The concept of breaking continuous values into discrete bins is relatively straightforward to understand and is a useful concept in real world analysis. Fortunately, pandas provides the cut and qcut functions to make this as simple or complex as you need it to be. I hope this article proves useful in understanding these pandas functions. Please feel free to comment below if you have any questions.

  • Analysing music habits with Spotify API and Python

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  • Python IDEs and Code Editors

    A code editor is a tool that is used to write and edit code. They are usually lightweight and can be great for learning. However, once your program gets larger, you need to test and debug your code, that's where IDEs come in. An IDE (Integrated Development Environment) understand your code much better than a text editor. It usually provides features such as build automation, code linting, testing and debugging. This can significantly speed up your work. The downside is that IDEs can be complicated to use.

  • Announcing Anaconda Distribution 2019.10

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  • Apple's Numbers and the All-in-One CSV export

    The hierarchical form requires a number of generator functions for Sheet-from-CSV, Table-from-CSV, and Row-from-CSV. Each of these works with a single underlying iterator over the source file and a fairly complex hand-off of state. If we only use the sheet iterator, the tables and rows are skipped. If we use the table within a sheet, the first table name comes from the header that started a sheet; the table names come from distinct headers until the sheet name changes. The table-within-sheet iteration is very tricky. The first table is a simple yield of information gathered by the sheet iterator. Any subsequent tables, however, may be based one one of two conditions: either no rows have been consumed, in which case the table iterator consumes (and ignores) rows; or, all the rows of the table have been consumed and the current row is another "sheet: table" header.

  • Formatting NFL data for doing data science with Python

    No matter what medium of content you consume these days (podcasts, articles, tweets, etc.), you'll probably come across some reference to data. Whether it's to back up a talking point or put a meta-view on how data is everywhere, data and its analysis are in high demand. As a programmer, I've found data science to be more comparable to wizardry than an exact science. I've coveted the ability to get ahold of raw data and glean something useful and concrete from it. What a useful talent!

  • Sony Pushes More AMD Jaguar Optimizations To Upstream LLVM 10 Compiler

    Sony engineers working on the PlayStation compiler toolchain continue upstreaming various improvements to the LLVM source tree for helping the AMD APUs powering their latest game console. Several times now we've pointed out Sony engineers contributing AMD "btver2" improvements to upstream LLVM with the company using LLVM/Clang as their default code compiler and the PlayStation 4 relying on a Jaguar APU.

  • [llvm-dev] GitHub Migration Schedule and Plans
    Hi,
    
    We're less than 2 weeks away from the developer meeting, so I wanted to
    give an update on the GitHub migration and what's (hopefully) going to
    happen during the developer meeting.
    
    Everyone who has added their information to the github-usernames.txt
    file in SVN before today should have received an invite to become a collaborator
    on the llvm-project repository.  If you did not receive an invite and think
    you should have, please contact me off-list.  I will continue to monitor the
    file for new updates and periodically send out new batches of invites.
    
    There is still some ongoing work to get the buildbots ready and the mailing lists
    ready, but we are optimistic that the work will be done in time.
    
    The team at GitHub has finished implementing the "Require Linear History"
    branch protection that we requested.  The feature is in beta and currently
    enabled in the llvm-project repository.  This means that we will have the
    option to commit directly via git, in addition to using the git-llvm script.
    A patch that updates git-llvm to push to git instead of svn can be found here:
    https://reviews.llvm.org/D67772.  You should be able to test it out on your
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    The current plan is to begin the final migration steps on the evening (PDT)
    of October 21.  Here is what will happen:
    
    1. Make SVN read-only.
    2. Turn-off the SVN->git update process.
    3. Commit the new git-llvm script directly to github.
    4. Grant all contributors write access to the repository.
    5. Email lists announcing that the migration is complete.
    
    Once the migration is complete, if you run into any issues, please file
    a bug, and mark it as a blocker for the github metabug PR39393.
    
    If you have any questions or think I am missing something, please
    let me know.
    
    Thanks,
    Tom
    
    
  • LLVM Plans To Switch From Its SVN To Git Workflow Next Week

    On 21 October they plan to make LLVM's SVN repository read-only and finish their git-llvm script to bring all the changes into Git, and then allow developers to begin contributing to the LLVM GitHub project as the new official source repository.

  • Excellent Free Books to Learn Erlang

    Erlang is a general-purpose, concurrent, declarative, functional programming language and runtime environment developed by Ericsson, a Swedish multinational provider of communications technology and services. Erlang is dynamically typed and has a pattern matching syntax. The language solves difficult problems inherent in parallel, concurrent environments. It uses sets of parallel supervised processes, not a single sequential process as found in most programming languages. Erlang was created in 1986 at the Ellemtel Telecommunication Systems Laboratories for telecommunication systems. The objective was to build a simple and efficient programming language resilient large-scale concurrent industrial applications. Besides telecommunication systems and applications and other large industrial real-time systems, Erlang is particularly suitable for servers for internet applications, e-commerce, and networked database applications. The versatility of the language is, in part, due to its extensive collection of libraries.

today's howtos

Kubernetes at SUSE and Red Hat

  • Eirinix: Writing Extensions for Eirini

    At the recent Cloud Foundry Summit EU in the Netherlands, Vlad Iovanov and Ettore Di Giacinto of SUSE presented a talk about Eirini — a project that allows the deployment and management of applications on Kubernetes using the Cloud Foundry Platform. They introduced eirinix — a framework that allows developers to extend Eirini. Eirinix is built from the Quarks codebase, which leverages Kubernetes Mutating Webhooks. With the flexibility of Kubernetes and Eirini’s architecture, developers can now build features around Eirini, like Persi support, access to the application via SSH, ASGs via Network Policies and more. In this talk, they explained how this can be done, and how everyone can start contributing to a rich ecosystem of extensions that will improve Eirini and the developer experience of Cloud Foundry.

  • Building an open ML platform with Red Hat OpenShift and Open Data Hub Project

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  • Launching OpenShift/Kubernetes Support for Solarflare Cloud Onload

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Python Across Platforms

  • Chemists bitten by Python scripts: How different OSes produced different results during test number-crunching

    Chemistry boffins at the University of Hawaii have found, rather disturbingly, that different computer operating systems running a particular set of Python scripts used for their research can produce different results when running the same code. In a research paper published last week in the academic journal Organic Letters, chemists Jayanti Bhandari Neupane, Ram Neupane, Yuheng Luo, Wesley Yoshida, Rui Sun, and Philip Williams describe their efforts to verify an experiment involving cyanobacteria, better known as blue-green algae. Williams, associate chair and professor in the department of chemistry at the University of Hawaii at Manoa, said in a phone interview with The Register on Monday this week that his group was looking at secondary metabolites, like penicillin, that can be used to treat cancer or Alzheimer's.

  • Chemists discover cross-platform Python scripts not so cross-platform

    In a paper published October 8, researchers at the University of Hawaii found that a programming error in a set of Python scripts commonly used for computational analysis of chemistry data returned varying results based on which operating system they were run on—throwing doubt on the results of more than 150 published chemistry studies. While trying to analyze results from an experiment involving cyanobacteria, the researchers—Jayanti Bhandari Neupane, Ram Neupane, Yuheng Luo, Wesley Yoshida, Rui Sun, and Philip Williams—discovered significant variations in results run against the same nuclear magnetic resonance spectroscopy (NMR) data. The scripts, called the "Willoughby-Hoye" scripts after their authors—Patrick Willoughby and Thomas Hoye of the University of Minnesota—were found to return correct results on macOS Mavericks and Windows 10. But on macOS Mojave and Ubuntu, the results were off by nearly a full percent.