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Reiser

Reiser4 Implements Mirror & Failover Support

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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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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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Linux Filesystems

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Movies
  • My assessment of “btrfs”

    In short: Novelist Stephen Elliott (James Franco) find himself drawn to the high-profile Hans Reiser (Christian Slater) murder trial - a case that brings him closer to his own troubled past with father (Ed Harris). Amber Heard, Wilmer Valderrama and Cynthia Nixon also star. (Watch the trailer)

  • The Adderall Diaries

    While Romanowsky gamely tries to negotiate the same structural tricks as the book, which employed the Reiser case as a base camp from which the author could depart and return, in the film it feels more like a subplot despite the cinematic tricks -- the cross-cutting and slo-mo flashbacks -- that the director uses to try to connect the stories. At times it feels flat, other times risible, and only occasionally do the stories resonate in any kind of harmony.

  • My assessment of “btrfs”

    Short version — I will continue to use “ext4” in future installs.

    Note that this a personal view, not a recommendation. My own choice depends on how I use computers and my practices for backup, recovery, etc. Your practices are likely different. Much of this post will be about my considerations in deciding against “btrfs” for my own use.

[via Susan]

Reiser4 Now Available For Linux 4.5 Kernel

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Reiser

The Reiser4 file-system has been updated with support for the Linux 4.5 kernel.

Edward Shishkin, the main Reiser4 developer left working on this out-of-tree file-system, today spun the Reiser4 patches for the Linux 4.5 kernel that also includes a few fixes/changes for satisfying the kernel and compiler. Aside from that, there's nothing new to report today with regard to new Reiser4 file-system features nor any new attempt to try to mainline this file-system code.

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Reiser4 Updated For Linux 3.16 With SSD Discard Support

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While Reiser4 doesn't still have any mainline Linux kernel ambitions until receiving any corporate backing, the notoriously known Linux file-system has been updated for Linux 3.16 compatibility and SSD discard support.

Over the weekend the Reiser4 file-system patches were updated for Linux 3.16.1/3.16.2 kernel support and additionally for presenting SSD discard support for the long-in-development Linux FS. This latest Reiser4 file-system work was done by Ivan Shapovalov and Edward Shishkin.

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Reiser4 Now Available for the 3.15 kernel, so what?

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Reiser

A recent announcement was made stating that the Reiser4 file system, successor to the ReiserFS, was ported to the 3.15 Linux kernel. Following the 2006 conviction and incarceration of the mastermind that original conceived this project (Hans Reiser), a few dedicated developers continued supporting this file system despite the odds stacked against them. In the last decade, the Linux kernel has seen newer file systems, most of which are integrated into the mainline kernel tree (i.e. btrfs, ext4, etc.). Reiser4 was rejected for inclusion some time back, and most of its developers moved on (one or more of which are currently working on btrfs).

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Reiser4 Now Available For Linux 3.15

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While the Linux 3.16 kernel is now stable, a few days ago the Reiser4 file-system was finally ported to Linux 3.15.

Edward Shishkin released Reiser4 for the Linux 3.15.1 kernel last weekend. Besides being ported to the kernel interface changes for Linux 3.15, there's also two bug-fixes for the out-of-tree file-system. Most of the Reiser4 activity these days continues to just be porting to new kernel versions and bug-fixing. Edward is down to being one of the only main developers left and there's expected to be no effort to mainline the controversial file-system without the support of a major Linux ISV/IHV.

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Reiser4 File-System SSD "Discard" Support Gets Revised

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Ivan Shapovalov is back on track with his Reiser4 file-system contributions.

Shapovalov has been working on Reiser4 support for TRIM/Discard on SSDs. It's been some weeks since the last revision but the fourth version of the patches are now out there for this common file-system feature of being able to discard blocks by informing the solid-state drive about blocks that are no longer in use by the file-system. Most mainline Linux file-systems already support SSD discard, which is generally exposed via the discard mount option -- which is also the case for Reiser4.

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Reiser4 Updated With Transaction Models, Linux 3.14

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Reiser

Reiser4 now has support for different transaction models. Reiser4 can now change between transaction models with regard to a journalling mode, a write-anywhere / copy-on-write model, and a hybrid transaction model.

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Reiser4: Different Transaction Models

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Reiser4 users now can choose a transaction model which is most suitable for their devices. This is very simple: just specify it by respective mount option. With the patch applied you will have 3 options.

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More in Tux Machines

LibreOffice Office Suite Celebrates 6 Years of Activity with LibreOffice 5.2.2

Today, September 29, 2016, Italo Vignoli from The Document Foundation informs Softpedia via an email announcement about the general availability of the first point release of the LibreOffice 5.2 open-source and cross-platform office suite. On September 28, the LibreOffice project celebrated its 6th anniversary, and what better way to celebrate than to push a new update of the popular open source and cross-platform office suite used by millions of computer users worldwide. Therefore, we would like to inform our readers about the general availability of LibreOffice 5.2.2, which comes just three weeks after the release of LibreOffice 5.2.1. "Just one day after the project 6th anniversary, The Document Foundation (TDF) announces the availability of LibreOffice 5.2.2, the second minor release of the LibreOffice 5.2 family," says Italo Vignoli. "LibreOffice 5.2.2, targeted at technology enthusiasts, early adopters and power users, provides a number of fixes over the major release announced in August." Read more

OSS Leftovers

  • But is it safe? Uncork a bottle of vintage open-source FUD
    Most of the open source questioners come from larger organisations. Banks very rarely pop up here, and governments have long been hip to using open source. Both have ancient, proprietary systems in place here and there that are finally crumbling to dust and need replacing fast. Their concerns are more oft around risk management and picking the right projects. It’s usually organisations whose business is dealing with actual three dimensional objects that ask about open source. Manufacturing, industrials, oil and gas, mining, and others who have typically looked at IT as, at best, a helper for their business rather than a core product enabler. These industries are witnessing the lighting fast injection of software into their products - that whole “Internet of Things” jag we keep hearing about. Companies here are being forced to look at both using open source in their products and shipping open source as part of their business. The technical and pricing requirements for IoT scale software is a perfect fit for open source, especially that pricing bit. On the other end - peddling open source themselves - companies that are looking to build and sell software-driven “platforms” are finding that partners and developers are not so keen to join closed source ecosystems. These two pulls create some weird clunking in the heads of management at these companies who aren’t used to working with a sandles and rainbow frame of mind. They have a scepticism born of their inexperience with open source. Let’s address some of their trepidation.
  • Real business innovation begins with open practices
    To business leaders, "open source" often sounds too altruistic—and altruism is in short supply on the average balance sheet. But using and contributing to open source makes hard-nosed business sense, particularly as a way of increasing innovation. Today's firms all face increased competition and dynamic markets. Yesterday's big bang can easily become today's cautionary tale. Strategically, the only viable response to this disruption is constantly striving to serve customers better through sustained and continuous innovation. But delivering innovation is hard; the key is to embrace open and collaborative innovation across organizational walls—open innovation. Open source communities' values and practices generate open innovation, and working in open source is a practical, pragmatic way of delivering innovation. To avoid the all-too-real risk of buzzword bingo we can consider two definitions of "innovation": creating value (that serves customer needs) to sell for a profit; or reducing what a firm pays for services.
  • This Week In Servo 79
    In the last week, we landed 96 PRs in the Servo organization’s repositories. Promise support has arrived in Servo, thanks to hard work by jdm, dati91, and mmatyas! This does not fully implement microtasks, but unblocks the uses of Promises in many places (e.g., the WebBluetooth test suite). Emilio rewrote the bindings generation code for rust-bindgen, dramatically improving the flow of the code and output generated when producing Rust bindings for C and C++ code. The TPAC WebBluetooth standards meeting talked a bit about the great progress by the team at the University of Szeged in the context of Servo.
  • Servo Web Engine Now Supports Promises, Continues Churning Along
    It's been nearly two months since last writing about Mozilla's Servo web layout engine (in early August, back when WebRender2 landed) but development has kept up and they continue enabling more features for this next-generation alternative to Gecko. The latest is that Servo now supports JavaScript promises. If you are unfamiliar with the promise support, see this guide. The latest Servo code has improvements around its Rust binding generator for C and C++ code plus other changes.
  • Riak TS for time series analysis at scale
    Until recently, doing time series analysis at scale was expensive and almost exclusively the domain of large enterprises. What made time series a hard and expensive problem to tackle? Until the advent of the NoSQL database, scaling up to meet increasing velocity and volumes of data generally meant scaling hardware vertically by adding CPUs, memory, or additional hard drives. When combined with database licensing models that charged per processor core, the cost of scaling was simply out of reach for most. Fortunately, the open source community is democratising large scale data analysis rapidly, and I am lucky enough to work at a company making contributions in this space. In my talk at All Things Open this year, I'll introduce Riak TS, a key-value database optimized to store and retrieve time series data for massive data sets, and demonstrate how to use it in conjunction with three other open source tools—Python, Pandas, and Jupyter—to build a completely open source time series analysis platform. And it doesn't take all that long.
  • Free Software Directory meeting recap for September 23rd, 2016

Security News

  • security things in Linux v4.5
  • Time to Kill Security Questions—or Answer Them With Lies
    The notion of using robust, random passwords has become all but mainstream—by now anyone with an inkling of security sense knows that “password1” and “1234567” aren’t doing them any favors. But even as password security improves, there’s something even more problematic that underlies them: security questions. Last week Yahoo revealed that it had been massively hacked, with at least 500 million of its users’ data compromised by state sponsored intruders. And included in the company’s list of breached data weren’t just the usual hashed passwords and email addresses, but the security questions and answers that victims had chosen as a backup means of resetting their passwords—supposedly secret information like your favorite place to vacation or the street you grew up on. Yahoo’s data debacle highlights how those innocuous-seeming questions remain a weak link in our online authentication systems. Ask the security community about security questions, and they’ll tell you that they should be abolished—and that until they are, you should never answer them honestly. From their dangerous guessability to the difficulty of changing them after a major breach like Yahoo’s, security questions have proven to be deeply inadequate as contingency mechanisms for passwords. They’re meant to be a reliable last-ditch recovery feature: Even if you forget a complicated password, the thinking goes, you won’t forget your mother’s maiden name or the city you were born in. But by relying on factual data that was never meant to be kept secret in the first place—web and social media searches can often reveal where someone grew up or what the make of their first car was—the approach puts accounts at risk. And since your first pet’s name never changes, your answers to security questions can be instantly compromised across many digital services if they are revealed through digital snooping or a data breach.
  • LibreSSL and the latest OpenSSL security advisory
    Just a quick note that LibreSSL is not impacted by either of the issues mentioned in the latest OpenSSL security advisory - both of the issues exist in code that was added to OpenSSL in the last release, which is not present in LibreSSL.
  • Record-breaking DDoS reportedly delivered by >145k hacked cameras
    Last week, security news site KrebsOnSecurity went dark for more than 24 hours following what was believed to be a record 620 gigabit-per-second denial of service attack brought on by an ensemble of routers, security cameras, or other so-called Internet of Things devices. Now, there's word of a similar attack on a French Web host that peaked at a staggering 1.1 terabits per second, more than 60 percent bigger. The attacks were first reported on September 19 by Octave Klaba, the founder and CTO of OVH. The first one reached 1.1 Tbps while a follow-on was 901 Gbps. Then, last Friday, he reported more attacks that were in the same almost incomprehensible range. He said the distributed denial-of-service (DDoS) attacks were delivered through a collection of hacked Internet-connected cameras and digital video recorders. With each one having the ability to bombard targets with 1 Mbps to 30 Mbps, he estimated the botnet had a capacity of 1.5 Tbps. On Monday, Klaba reported that more than 6,800 new cameras had joined the botnet and said further that over the previous 48 hours the hosting service was subjected to dozens of attacks, some ranging from 100 Gbps to 800 Gbps. On Wednesday, he said more than 15,000 new devices had participated in attacks over the past 48 hours.

Android Leftovers