An anonymous reader quotes a report from Ars Technica: The English-language edition of Wikipedia is blacklisting Archive.today after the controversial archive site was used to direct a distributed denial of service (DDoS) attack against a blog. In the course of discussing whether Archive.today should be deprecated because of the DDoS, Wikipedia editors discovered that the archive site altered snapshots of webpages to insert the name of the blogger who was targeted by the DDoS. The alterations were apparently fueled by a grudge against the blogger over a post that described how the Archive.today maintainer hid their identity behind several aliases.

"There is consensus to immediately deprecate archive.today, and, as soon as practicable, add it to the spam blacklist (or create an edit filter that blocks adding new links), and remove all links to it," stated an update today on Wikipedia's Archive.today discussion. "There is a strong consensus that Wikipedia should not direct its readers towards a website that hijacks users' computers to run a DDoS attack (see WP:ELNO#3). Additionally, evidence has been presented that archive.today's operators have altered the content of archived pages, rendering it unreliable."

More than 695,000 links to Archive.today are distributed across 400,000 or so Wikipedia pages. The archive site, which is facing an investigation in which the FBI is trying to uncover the identity of its founder, is commonly used to bypass news paywalls. "Those in favor of maintaining the status quo rested their arguments primarily on the utility of archive.today for verifiability," said today's Wikipedia update. "However, an analysis of existing links has shown that most of its uses can be replaced. Several editors started to work out implementation details during this RfC [request for comment] and the community should figure out how to efficiently remove links to archive.today."

Minecraft: Java Edition is switching its rendering backend from OpenGL to Vulkan as part of the upcoming Vibrant Visuals update, aiming for both better performance and modern graphics features across platforms like Linux and macOS (via translation layers). GamingOnLinux reports: For modders, they're suggesting they start making preparations to move away from OpenGL: "Switching from OpenGL to Vulkan will have an impact on the mods that currently use OpenGL for rendering, and we anticipate that updating from OpenGL to Vulkan will take modders more effort than the updates you undertake for each of our releases. To start with, we recommend our modding community look at moving away from OpenGL usage. We encourage authors to try to reuse as much of the internal rendering APIs as possible, to make this transition as easy as possible. If that is not sufficient for your needs, then come and talk to us!"

It does mean that players on really old devices that don't support Vulkan will be left out, but Vulkan has been supported going back to some pretty old GPUs. You've got time though, as they'll be rolling out Vulkan alongside OpenGL in snapshots (development releases) "sometime over the summer." You'll be able to toggle between them during the testing period until Mojang believe it's ready. OpenGL will be entirely removed eventually once they're happy with performance and stability.

Automattic and the Internet Archive have released a free, open-source WordPress plugin that automatically detects broken outbound links on a site and redirects visitors to archived Wayback Machine copies instead of serving them a 404 error.

The Internet Archive Wayback Machine Link Fixer, which launched last fall and is available on WordPress.org, runs in the background scanning posts for dead links, checking for existing archived versions, and requesting new snapshots when none exist. It also archives a site's own posts whenever they are updated. If the original link comes back online, the plugin stops redirecting.

Pew Research has found that 38% of the web has disappeared over the past decade, and WordPress powers more than 40% of websites online.

An anonymous reader quotes a report from Reuters: Shares of videogame companies fell sharply in afternoon trading on Friday after Alphabet's Google rolled out its artificial intelligence model capable of creating interactive digital worlds with simple prompts. Shares of "Grand Theft Auto" maker Take-Two Interactive fell 10%, online gaming platform Roblox was down over 12%, while videogame engine maker Unity Software dropped 21%.

The AI model, dubbed "Project Genie," allows users to simulate a real-world environment through prompts with text or uploaded images, potentially disrupting how video games have been made for over a decade and forcing developers to adapt to the fast-moving technology. "Unlike explorable experiences in static 3D snapshots, Genie 3 generates the path ahead in real time as you move and interact with the world. It simulates physics and interactions for dynamic worlds," Google said in a blog post on Thursday.

Traditionally, most videogames are built inside a game engine such as Epic Games' "Unreal Engine" or the "Unity Engine", which handles complex processes like in-game gravity, lighting, sound, and object or character physics. "We'll see a real transformation in development and output once AI-based design starts creating experiences that are uniquely its own, rather than just accelerating traditional workflows," said Joost van Dreunen, games professor at NYU's Stern School of Business. Project Genie also has the potential to shorten lengthy development cycles and reduce costs, as some premium titles take around five to seven years and hundreds of millions of dollars to create.

The FBI has subpoenaed popular Canadian domain registrar Tucows, demanding information about the owner of archive[dot]today, a popular archiving site used to bypass paywalls and avoid sending traffic to original publishers. The subpoena states it relates to a federal criminal investigation but provides no details about the alleged crime.

Archive.today posted the document on X the same day. The site, also known as archive.is and archive.ph, started in the early 2010s and rose to prominence during GamerGate when users took snapshots of articles to avoid sending traffic to websites. It now has hundreds of millions of saved pages. The FBI requested the customer name, address, billing information, telephone connection records, payment methods, internet connectivity session times, and device identifiers.

Very little is known about who operates the site. A 2013 analysis by Gyrovague suggested it is "a one-person labor of love, operated by a Russian of considerable talent and access to Europe." A 2013 FAQ states the site is privately funded. A 2021 blog post said "it is doomed to die at any moment."

The Brave Browser now blocks Microsoft Recall by default for Windows 11+ users, preventing the controversial screenshot-logging feature from capturing any Brave tabs -- regardless of whether users are in private mode. Brave cites persistent privacy concerns and potential abuse scenarios as justification. From a blog post: Microsoft has, to their credit, made several security and privacy-positive changes to Recall in response to concerns. Still, the feature is in preview, and Microsoft plans to roll it out more widely soon. What exactly the feature will look like when it's fully released to all Windows 11 users is still up in the air, but the initial tone-deaf announcement does not inspire confidence.

Given Brave's focus on privacy-maximizing defaults and what is at stake here (your entire browsing history), we have proactively disabled Recall for all Brave tabs. We think it's vital that your browsing activity on Brave does not accidentally end up in a persistent database, which is especially ripe for abuse in highly-privacy-sensitive cases such as intimate partner violence.

Microsoft has said that private browsing windows on browsers will not be saved as snapshots. We've extended that logic to apply to all Brave browser windows. We tell the operating system that every Brave tab is 'private', so Recall never captures it. This is yet another example of how Brave engineers are able to quickly tweak Chromium's privacy functionality to make Brave safer for our users (inexhaustive list here). For more technical details, see the pull request implementing this feature. Brave is the only major Web browser that disables Microsoft Recall by default in all tabs.

An anonymous reader quotes a report from 404 Media: Datasets aggregated on data.gov, the largest repository of U.S. government open data on the internet, are being deleted, according to the website's own information. Since Donald Trump was inaugurated as president, more than 2,000 datasets have disappeared from the database. As people in the Data Hoarding and archiving communities have pointed out, on January 21, there were 307,854 datasets on data.gov. As of Thursday, there are 305,564 datasets. Many of the deletions happened immediately after Trump was inaugurated, according to snapshots of the website saved on the Internet Archive's Wayback Machine. Harvard University researcher Jack Cushman has been taking snapshots of Data.gov's datasets both before and after the inauguration, and has worked to create a full archive of the data.

"Some of [the entries link to] actual data," Cushman told 404 Media. "And some of them link to a landing page [where the data is hosted]. And the question is -- when things are disappearing, is it the data it points to that is gone? Or is it just the index to it that's gone?" For example, "National Coral Reef Monitoring Program: Water Temperature Data from Subsurface Temperature Recorders (STRs) deployed at coral reef sites in the Hawaiian Archipelago from 2005 to 2019," a NOAA dataset, can no longer be found on data.gov but can be found on one of NOAA's websites by Googling the title. "Stetson Flower Garden Banks Benthic_Covage Monitoring 1993-2018 -- OBIS Event," another NOAA dataset, can no longer be found on data.gov and also appears to have been deleted from the internet. "Three Dimensional Thermal Model of Newberry Volcano, Oregon," a Department of Energy resource, is no longer available via the Department of Energy but can be found backed up on third-party websites. [...]

Data.gov serves as an aggregator of datasets and research across the entire government, meaning it isn't a single database. This makes it slightly harder to archive than any individual database, according to Mark Phillips, a University of Northern Texas researcher who works on the End of Term Web Archive, a project that archives as much as possible from government websites before a new administration takes over. "Some of this falls into the 'We don't know what we don't know,'" Phillips told 404 Media. "It is very challenging to know exactly what, where, how often it changes, and what is new, gone, or going to move. Saving content from an aggregator like data.gov is a bit more challenging for the End of Term work because often the data is only identified and registered as a metadata record with data.gov but the actual data could live on another website, a state .gov, a university website, cloud provider like Amazon or Microsoft or any other location. This makes the crawling even more difficult."

Phillips said that, for this round of archiving (which the team does every administration change), the project has been crawling government websites since January 2024, and that they have been doing "large-scale crawls with help from our partners at the Internet Archive, Common Crawl, and the University of North Texas. We've worked to collect 100s of terabytes of web content, which includes datasets from domains like data.gov." [...] It is absolutely true that the Trump administration is deleting government data and research and is making it harder to access. But determining what is gone, where it went, whether it's been preserved somewhere, and why it was taken down is a process that is time intensive and going to take a while. "One thing that is clear to me about datasets coming down from data.gov is that when we rely on one place for collecting, hosting, and making available these datasets, we will always have an issue with data disappearing," Phillips said. "Historically the federal government would distribute information to libraries across the country to provide greater access and also a safeguard against loss. That isn't done in the same way for this government data."

SysEngineer shares a report from the Associated Press: A spacecraft has beamed back some of the best close-up photos yet of Mercury's north pole. The European and Japanese robotic explorer swooped as close as 183 miles (295 kilometers) above Mercury's night side before passing directly over the planet's north pole. The European Space Agency released the stunning snapshots Thursday, showing the permanently shadowed craters at the top of of our solar system's smallest, innermost planet. Cameras also captured views of neighboring volcanic plains and Mercury's largest impact crater, which spans more than 930 miles (1,500 kilometers).

Microsoft's controversial "Recall" feature (in a public preview of Windows 11) already has some known issues, Microsoft admitted Friday. For example:

- Recall can be enabled or disabled from "Turn Windows features on or off". We are caching the Recall binaries on disk while we test add/remove. In a future update we will completely remove the binaries.

- You must have Secure Boot enabled for Recall to save snapshots.

- Some users experience a delay before snapshots first appear in the timeline while using their device. If snapshots do not appear after 5 minutes, reboot your device. If saving snapshots is enabled, but you see snapshots are no longer being saved, reboot your device.

- Clicking links within Recall to submit feedback may experience a delay in loading the Feedback Hub application. Be patient and it will display.

CNBC adds that according to Microsoft Recall "won't work with some accessibility programs, and if you specify that Recall shouldn't save content from a given website, it might get captured anyway while using the built-in Edge browser..." But those aren't the only issues CNBC noticed: - While you might expect that your computer will be recording every last thing you look at once you've turned on Recall, it can go several minutes between making snapshots, leaving gaps in the timeline.

- Recall allows you to prevent screenshots from being made when you're accessing specific apps. But a few apps installed on my Surface Pro are not shown on that list.

- When you enter a search string to find words, results might be incomplete or incorrect. Recall clearly had two screen images that mention "Yankees," but when I typed that into the search box, only one of them came up as a text match. I typed in my last name, which appeared in eight images, but Recall produced just two text matches.

- Recall made a screenshot while I was scrolling through posts on social network BlueSky, and one contains a photo of a New York street scene. You can see a stoplight, a smokestack and street signs. I typed each of those into the search box, but Recall came up with no results...

- The search function is fast, but flipping through snapshots in Recall is not. It can take a couple of seconds to load screenshots as you swipe between them.

The Euclid mission has revealed the first part of a 3D map of the universe, showcasing 14 million galaxies and tens of millions of stars with unprecedented detail. "The Euclid mission, launched in 2023 and run by the European Space Agency (Esa) with contributions from Nasa, sent its first snapshots in November of that year and in May 2024," reports The Guardian. "The goal of Euclid is to enable the creation of a 3D map in time and space of the universe, in an attempt to elucidate its evolution and, as a result, shed light on the mysterious phenomena of dark energy and dark matter that together make up 95% of the universe." From the report: The newly released data is a mosaic of 208 gigapixels and covers 1% of what will be the final map. The completed map is expected to involve six years of observations and will take in a third of the sky, with observations expected to capture billions of galaxies out to 10 billion light years. [...] Images released by Esa highlight the area of the sky covered by the new mosaic, together with the mosaic itself and zoomed-in views within it.

Esa said regions of light blue that can be seen in the mosaic were galactic cirrus clouds that sit between stars in the Milky Way. These wispy clouds, composed of gas and dust, reflect optical light, allowing them to be captured by the mission's super-sensitive visible light camera. Zoom in on the mosaic further and other features can be seen, including the spiral galaxy NGC 2188 and the galaxy cluster Abell 3381. In a view zoomed in 600 times relative to the original mosaic, a distant swirling galaxy is visible in incredible detail.

America's National Institute of Standards and Technology (NIST) has released a new open-source software tool called Dioptra for testing the resilience of machine learning models to various types of attacks.

"Key features that are new from the alpha release include a new web-based front end, user authentication, and provenance tracking of all the elements of an experiment, which enables reproducibility and verification of results," a NIST spokesperson told SC Media: Previous NIST research identified three main categories of attacks against machine learning algorithms: evasion, poisoning and oracle. Evasion attacks aim to trigger an inaccurate model response by manipulating the data input (for example, by adding noise), poisoning attacks aim to impede the model's accuracy by altering its training data, leading to incorrect associations, and oracle attacks aim to "reverse engineer" the model to gain information about its training dataset or parameters, according to NIST.

The free platform enables users to determine to what degree attacks in the three categories mentioned will affect model performance and can also be used to gauge the use of various defenses such as data sanitization or more robust training methods.

The open-source testbed has a modular design to support experimentation with different combinations of factors such as different models, training datasets, attack tactics and defenses. The newly released 1.0.0 version of Dioptra comes with a number of features to maximize its accessibility to first-party model developers, second-party model users or purchasers, third-party model testers or auditors, and researchers in the ML field alike. Along with its modular architecture design and user-friendly web interface, Dioptra 1.0.0 is also extensible and interoperable with Python plugins that add functionality... Dioptra tracks experiment histories, including inputs and resource snapshots that support traceable and reproducible testing, which can unveil insights that lead to more effective model development and defenses.
NIST also published final versions of three "guidance" documents, according to the article. "The first tackles 12 unique risks of generative AI along with more than 200 recommended actions to help manage these risks. The second outlines Secure Software Development Practices for Generative AI and Dual-Use Foundation Models, and the third provides a plan for global cooperation in the development of AI standards."

Thanks to Slashdot reader spatwei for sharing the news.

An anonymous reader quotes a report from Ars Technica: Human Rights Watch (HRW) continues to reveal how photos of real children casually posted online years ago are being used to train AI models powering image generators -- even when platforms prohibit scraping and families use strict privacy settings. Last month, HRW researcher Hye Jung Han found 170 photos of Brazilian kids that were linked in LAION-5B, a popular AI dataset built from Common Crawl snapshots of the public web. Now, she has released a second report, flagging 190 photos of children from all of Australia's states and territories, including indigenous children who may be particularly vulnerable to harms. These photos are linked in the dataset "without the knowledge or consent of the children or their families." They span the entirety of childhood, making it possible for AI image generators to generate realistic deepfakes of real Australian children, Han's report said. Perhaps even more concerning, the URLs in the dataset sometimes reveal identifying information about children, including their names and locations where photos were shot, making it easy to track down children whose images might not otherwise be discoverable online. That puts children in danger of privacy and safety risks, Han said, and some parents thinking they've protected their kids' privacy online may not realize that these risks exist.

From a single link to one photo that showed "two boys, ages 3 and 4, grinning from ear to ear as they hold paintbrushes in front of a colorful mural," Han could trace "both children's full names and ages, and the name of the preschool they attend in Perth, in Western Australia." And perhaps most disturbingly, "information about these children does not appear to exist anywhere else on the Internet" -- suggesting that families were particularly cautious in shielding these boys' identities online. Stricter privacy settings were used in another image that Han found linked in the dataset. The photo showed "a close-up of two boys making funny faces, captured from a video posted on YouTube of teenagers celebrating" during the week after their final exams, Han reported. Whoever posted that YouTube video adjusted privacy settings so that it would be "unlisted" and would not appear in searches. Only someone with a link to the video was supposed to have access, but that didn't stop Common Crawl from archiving the image, nor did YouTube policies prohibiting AI scraping or harvesting of identifying information.

Reached for comment, YouTube's spokesperson, Jack Malon, told Ars that YouTube has "been clear that the unauthorized scraping of YouTube content is a violation of our Terms of Service, and we continue to take action against this type of abuse." But Han worries that even if YouTube did join efforts to remove images of children from the dataset, the damage has been done, since AI tools have already trained on them. That's why -- even more than parents need tech companies to up their game blocking AI training -- kids need regulators to intervene and stop training before it happens, Han's report said. Han's report comes a month before Australia is expected to release a reformed draft of the country's Privacy Act. Those reforms include a draft of Australia's first child data protection law, known as the Children's Online Privacy Code, but Han told Ars that even people involved in long-running discussions about reforms aren't "actually sure how much the government is going to announce in August." "Children in Australia are waiting with bated breath to see if the government will adopt protections for them," Han said, emphasizing in her report that "children should not have to live in fear that their photos might be stolen and weaponized against them."

In an unprecedented move, Microsoft has announced that its big Copilot+ PC initiative that was unveiled last month will launch without its headlining "Windows Recall" AI feature next week on June 18. From a report: The feature, which captures snapshots of your screen every few seconds, was revealed to store sensitive user data in an unencrypted state, raising serious concerns among security researchers and experts.

Last week, Microsoft addressed these concerns by announcing that it would make changes to Windows Recall to ensure the feature handles data securely on device. At that time, the company insisted that Windows Recall would launch alongside Copilot+ PCs on June 18, with an update being made available at launch to address the concerns with Windows Recall. Now, Microsoft is saying Windows Recall will launch at a later date, beyond the general availability of Copilot+ PCs. This means these new devices will be missing their headlining AI feature at launch, as Windows Recall is now delayed indefinitely. The company says Windows Recall will be added in a future Windows update, but has not given a timeframe for when this will be. Further reading:
'Microsoft Has Lost Trust With Its Users and Windows Recall is the Straw That Broke the Camel's Back'
Windows 11's New Recall Feature Has Been Cracked To Run On Unsupported Hardware
Is the New 'Recall' Feature in Windows a Security and Privacy Nightmare?
Mozilla Says It's Concerned About Windows Recall.

Slashdot reader storagedude shares a provocative post from the cybersecurity news blog of Cyble Inc. (a Ycombinator-backed company promising "AI-powered actionable threat intelligence").

The post delves into concerns that the new "Recall" feature planned for Windows (on upcoming Copilot+ PCs) is "a security and privacy nightmare." Copilot Recall will be enabled by default and will capture frequent screenshots, or "snapshots," of a user's activity and store them in a local database tied to the user account. The potential for exposure of personal and sensitive data through the new feature has alarmed security and privacy advocates and even sparked a UK inquiry into the issue. In a long Mastodon thread on the new feature, Windows security researcher Kevin Beaumont wrote, "I'm not being hyperbolic when I say this is the dumbest cybersecurity move in a decade. Good luck to my parents safely using their PC."

In a blog post on Recall security and privacy, Microsoft said that processing and storage are done only on the local device and encrypted, but even Microsoft's own explanations raise concerns: "Note that Recall does not perform content moderation. It will not hide information such as passwords or financial account numbers. That data may be in snapshots that are stored on your device, especially when sites do not follow standard internet protocols like cloaking password entry." Security and privacy advocates take issue with assertions that the data is stored securely on the local device. If someone has a user's password or if a court orders that data be turned over for legal or law enforcement purposes, the amount of data exposed could be much greater with Recall than would otherwise be exposed... And hackers, malware and infostealers will have access to vastly more data than they would without Recall.

Beaumont said the screenshots are stored in a SQLite database, "and you can access it as the user including programmatically. It 100% does not need physical access and can be stolen.... Recall enables threat actors to automate scraping everything you've ever looked at within seconds."
Beaumont's LinkedIn profile and blog say that starting in 2020 he worked at Microsoft for nearly a year as a senior threat intelligence analyst. And now Beaumont's Mastodon post is also raising other concerns (according to Cyble's blog post):

• "Sensitive data deleted by users will still be saved in Recall screenshots... 'If you or a friend use disappearing messages in WhatsApp, Signal etc, it is recorded regardless.'"

• "Beaumont also questioned Microsoft's assertion that all this is done locally."

The blog post also notes that Leslie Carhart, Director of Incident Response at Dragos, had this reaction to Beaumont's post. "The outrage and disbelief are warranted."

Last than two weeks after it was announced, "Windows enthusiasts have managed to crack Microsoft's flagship AI-powered Recall feature to run on unsupported hardware," reports The Verge. From the report: Recall leverages local AI models on new Copilot Plus PCs to run in the background and take snapshots of anything you've done or seen on your PC. You then get a timeline you can scrub through and the ability to search for photos, documents, conversations, or anything else on your PC. Microsoft positioned Recall as needing the very latest neural processing units (NPU) on new PCs, but you can actually get it running on older Arm-powered hardware.

Windows watcher Albacore has created a tool called Amperage, which enables Recall on devices that have an older Qualcomm Snapdragon chip, Microsoft's SQ processors, or an Ampere chipset. You need to have the latest Windows 11 24H2 update installed on one of these Windows on Arm devices, and then the tool will unlock and enable Recall. [...] You can technically unlock Recall on x86 devices, but the app won't do much until Microsoft publishes the x64 AI components required to get it up and running. Rumors suggest both AMD and Intel are close to announcing Copilot Plus PCs, so Microsoft's AI components for those machines may well appear soon. I managed to get Recall running on an x64 Windows 11 virtual machine earlier today just to test out the initial first-run experience.

Microsoft's Windows Recall feature is attracting controversy before even venturing out of preview. From a report: The principle is simple. Windows takes a snapshot of a user's active screen every few seconds and dumps it to disk. The user can then scroll through the snapshots and, when something is selected, the user is given options to interact with the content.

Mozilla's Chief Product Officer, Steve Teixeira, told The Register: "Mozilla is concerned about Windows Recall. From a browser perspective, some data should be saved, and some shouldn't. Recall stores not just browser history, but also data that users type into the browser with only very coarse control over what gets stored. While the data is stored in encrypted format, this stored data represents a new vector of attack for cybercriminals and a new privacy worry for shared computers.

"Microsoft is also once again playing gatekeeper and picking which browsers get to win and lose on Windows -- favoring, of course, Microsoft Edge. Microsoft's Edge allows users to block specific websites and private browsing activity from being seen by Recall. Other Chromium-based browsers can filter out private browsing activity but lose the ability to block sensitive websites (such as financial sites) from Recall. "Right now, there's no documentation on how a non-Chromium based, third-party browser, such as Firefox, can protect user privacy from Recall. Microsoft did not engage our cooperation on Recall, but we would have loved for that to be the case, which would have enabled us to partner on giving users true agency over their privacy, regardless of the browser they choose."

TikTok has started testing its Instagram competitor, TikTok Notes, in Canada and Australia. TechCrunch reports: The company said on X that it is in the "early stage" of the app's rollout and that the app is "a dedicated space for photo and text content." "We hope that the TikTok community will use TikTok Notes to continue sharing their moments through photo posts. Whether documenting adventures, expressing creativity, or simply sharing snapshots of one's day, the TikTok Notes experience is designed for those who would like to share and engage through photo content," it said.

The company didn't say much about the app's features and functionality apart from the fact that users can log in with their existing TikTok account. Even the app's description in the app stores is pretty light on details. The screenshots on the App Store listing suggest that the posts will appear in two-column grids on the home page. The screenshots also indicate that you can post multiple photos through a carousel post.

Some ZFS news from Phoronix this week. "At the end of last year OpenZFS 2.2.2 was released to fix a rare but nasty data corruption issue, but it turns out there are other data corruption bug(s) still lurking in the OpenZFS file-system codebase." A Phoronix reader wrote in today about an OpenZFS data corruption bug when employing native encryption and making use of send/recv support. Making use of zfs send on an encrypted dataset can cause one or more snapshots to report errors. OpenZFS data corruption issues in this area have apparently been known for years.

Since May 2021 there's been this open issue around ZFS corruption related to snapshots on post-2.0 OpenZFS. That issue remains open. A new ticket has been opened for OpenZFS as well in proposing to add warnings against using ZFS native encryption and the send/receive support in production environments.
jd (Slashdot reader #1,658) spotted the news — and adds a positive note. "Bugs, old and new, are being catalogued and addressed much more quickly now that core development is done under Linux, even though it is not mainstreamed in the kernel."

Linux kernel 6.7 has been released, including support for the new next-gen copy-on-write (COW) bcachefs file system. The Register reports: Linus Torvalds announced the release on Sunday, noting that it is "one of the largest kernel releases we've ever had." Among the bigger and more visible changes are a whole new file system, along with fresh functionality for several existing ones; improved graphics support for several vendors' hardware; and the removal of an entire CPU architecture. [...] The single biggest feature of 6.7 is the new bcachefs file system, which we examined in March 2022. As this is the first release of Linux to include the new file system, it definitely would be premature to trust any important data to it yet, but this is a welcome change. The executive summary is that bcachefs is a next-generation file system that, like Btrfs and ZFS, provides COW functionality. COW enables the almost instant creation of "snapshots" of all or part of a drive or volume, which enables the OS to make disk operations transactional: In other words, to provide an "undo" function for complex sets of disk write operations.

Having a COW file system on Linux isn't new. The existing next-gen file system in the kernel, Btrfs, also supports COW snapshots. The version in 6.7 sees several refinements. It inherits a feature implemented for Steam OS: Two Btrfs file systems with the same ID can be mounted simultaneously, for failover scenarios. It also has improved quota support and a new raid_stripe_tree that improves handling of arrays of dissimilar drives. Btrfs remains somewhat controversial. Red Hat banished it from RHEL years ago (although Oracle Linux still offers it) but SUSE's distros depend heavily upon it. It will be interesting to see how quickly SUSE's Snapper tool gains support for bcachefs: This new COW contender may reveal unquestioned assumptions built into the code. Since Snapper is also used in several non-SUSE distros, including Spiral Linux, Garuda, and siduction, they're tied to Btrfs as well.

The other widely used FOSS next-gen file system, OpenZFS, also supports COW, but licensing conflicts prevent ZFS being fully integrated into the Linux kernel. So although multiple distros (such as NixOS, Proxmox, TrueNAS Scale, Ubuntu, and Void Linux) support ZFS, it must remain separate and distinct. This results in limitations, such as the ZFS Advanced Read Cache being separate from Linux's page cache. Bcachefs is all-GPL and doesn't suffer from such limitations. It aims to supply the important features of ZFS, such as integrated volume management, while being as fast as ext4 or XFS, and also surpass Btrfs in both performance and, crucially, reliability. A full list of changes in this release can be viewed via KernelNewbies.

The new open-source, copy-on-write file system known as Bcachefs has been successfully merged into the Linux 6.7 kernel. "Given the past struggles to get Bcachefs mainlined, I certainly didn't expect to see Linus Torvalds act so soon on merging it," writes Phoronix's Michael Larabel. "But after it spent all of the 6.6 cycle within Linux-Next, overnight Linus Torvalds did in fact land this new file-system developed by Kent Overstreet."

From a Slashdot story published on Friday August 21, 2015: Bcachefs is a new open-source file-system derived from the bcache Linux kernel block layer cache. Bcachefs was announced by Kent Overstreet, the lead Bcache author. Bcachefs hopes to provide performance like XFS/EXT4 while having features similar to Btrfs and ZFS. The bachefs on-disk format hasn't yet been finalized and the code isn't yet ready for the Linux kernel. That said, initial performance results are okay and "It probably won't eat your data -- but no promises." Features so far for Bcachefs are support for multiple devices, built-in caching/tiering, CRC32C checksumming, and Zlib transparent compression. Support for snapshots is to be worked on.