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Persistent L2ARC might be coming to ZFS on Linux

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Linux

Enlarge / Intel's Optane persistent memory is widely considered the best choice for ZFS write buffer devices. But L2ARC is more forgiving than SLOG, and larger, slower devices like standard consumer M.2 SSDs should work well for it, too.

Today, a request for code review came across the ZFS developers' mailing list. Developer George Amanakis has ported and revised code improvement that makes the L2ARC—OpenZFS's read cache device feature—persistent across reboots. Amanakis explains...

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today's leftovers

  • Ray Tracing Gets Its First Open-Source, Cross-Platform Implementation

    Khronos, the consortium responsible for many open standards in the gaming/graphics world, has released a beta ray tracing API, making it the first cross-platform implementation of real-time ray tracing. NVIDIA also released new beta drivers that support it. If you don’t know what I’m talking about; ray tracing is a CGI technique that is used to create photorealistic images. It renders objects by simulating the way actual rays of lights work in the real world and “tracing” them from the eye of the viewer, hence the name. Practically speaking, it gives us better shadows, reflections, translucence, refraction and a myriad of other improvements over the techniques that our consoles are currently deploying.

  • Glue42 releases open source platform

    Glue42, the company that delivers integrated desktop experiences to financial institutions globally, today announced it has released Glue42 Core, an open-source, fully functional platform for web application interoperability. The solution is available immediately to all in the financial services industry and those in other sectors.

  • 01 Communique Invites Email Users to Try IronCAP X Personal Usage Email Platform After April 23rd Launch

    01 Communique Laboratory Inc. (the "Company", "01 Communique") (ONE.V) invites all email users to try out their new IronCAP X personal usage email encryption product as it will be free to personal users after the April 23rd product launch. The Company's IronCAP X email encryption technology is designed to be safe against future attack from quantum computer. Therefore, it has a higher protection level than current GPG, or GNU Privacy Guard public key cryptography implementation platforms, and at the same time, easier for non-technical users. [...] Andrew Cheung, President of 01 Communique stated, "The IT community likes the current GPG email/file encryption package as it works well but there is always a catch. Most non-technical users cannot appreciate what it can do and how to install it. IronCAP X technology has addressed all of that as it wraps friendly packing around GPG." Mr. Cheung continued, "On April 23rd, we are launching IronCAP X which is easy to install and use, and protects against the quantum computing threat. Best of all, it will be free for personal users."

  • Richard Stallman: Don’t watch TV coverage of Covid-19!

    Don't watch TV coverage of Covid-19! (Or "social media"; the details are different.) Watching repetitive coverage of something frightening can interfere with clear thinking, even traumatize people. TV news coverage of a crisis struggles to fill 24 hours a day with "information", notwithstanding the fact that the actual flow of new information about the crisis is nowhere near sufficient to fill that time. What do they do? They repeat. They present tangential and minor details. They make the same points in different ways. They belabor the obvious. They repeat. If your goal is to be informed, you don't need to dwell on the crisis for hours every day. Not even one hour a day. Getting your news in this inefficient matter will waste a lot of time — and worse. In addition, it will make you more and more anxious. Someone I knew in 2001, who lived in California. spent all day on Sep 11 and following days watching the TV coverage. Afterward perse was afraid to go outside, watching for terrorist airplanes. TV made it possible for per to be traumatized by events 3000 miles away. That was an unusually strong case. Most people did not get so traumatized as that. That does not imply it did not affect them. I suspect that the TV coverage may have shifted millions of people's perceptions, so that they overestimated the danger of terrorism while downplaying the danger of laws that take away freedom. This would have smoothed the path for careless passage of the dangerous USA PAT RIOT Act and its massive surveillance. In any a good, general textual news site, you can read the things you really want to know about Covid-19 in 10 or 20 minutes a day. Then you won't fall behind on your work, and you won't be brainwashed into panic. Keep calm and carry on!

  • Microsoft Team's bad arrogance on (Fedora) Linux

    As you might suspect, this isn't the only thing that the postinstall script does. It also adds an enabled Microsoft package repository to your system (requiring signatures, at least, which is why they have to add their key). It's not documented that they'll do this, they certainly don't ask, all of this is done on the fly so the relevant yum.repos.d file isn't in the RPM's manifest, and I don't believe they restrict what packages can be installed from their repository (although from its URL it appears to be specific to Teams).

    (Another fun thing that the RPM does is that it puts the actual Teams binary and its shared library .so files in /usr/share/teams. I do not know how to break it to Microsoft, but that is not what goes in /usr/share. Also, it is of course an Electron app.)

  • Oracle teases prospect of playing nicely with open-source Java in update to WebLogic application server

    Oracle has chosen this week of all weeks to foist on the world an update of its application server WebLogic, festooned with new features addressing Java EE 8, Kubernetes and JSON. But the most eye-catching prospect is compatibility with the Eclipse Foundation's fully open-source Java development environment, Jakarta EE 8. Back in Sepember when the Java EE specs were made public, Mark Little, Red Hat's JBoss CTO, said: "Existing Java EE 8 applications and developers can be confident they can move their applications seamlessly to the Eclipse Foundation effort." And Tom Snyder, veep of Oracle Software Development, promised application server support would follow. "This represents the culmination of a great deal of work by the entire Jakarta EE community, including Oracle. Oracle is working on delivery of a Java EE 8 and Jakarta EE 8 compatible WebLogic Server implementation, and we are looking forward to working with the community to evolve Jakarta EE for the future."

  • Jakub Steiner: Art vs Design

    So what was the situation twitter was praising? Let’s count on how many GNOME applications shipped a custom nighly icon. Umm, how about zero? A pretty picture an artist spends hours on, modelling, texturing, lighting, adjusting for low resolution screens is not a visual framework nor a reasonable thing to ask app developers to do.

today's howtos