Category Archives: Stiri IT Externe

Reiser5 Updates For Linux 5.5 Along With Reiser4


LINUX STORAGE --

The out-of-tree Reiser4 and Reiser5 (Reiser4 v5) patches have been updated against the recently stabilized Linux 5.5 kernel.

Main Reiser4 developer Edward Shishkin re-based the Reiser4 file-system patch against Linux 5.5.1 along with the experimental Reiser5.

At the end of 2019 is when Shishkin announced Reiser5 file-system development with introducing the concepts of local volumes capable of parallel scaling out and other key iterations over the current Reiser4 design.

Reiser4 support for Linux 5.5 is available here and the experimental Reiser5 within the v5-unstable area.

Besides re-basing the code for compatibility with upstream Linux 5.5.1, there doesn’t appear to be any other notable changes this round. There also at the moment isn’t anything new to report on Reiser5 development or ultimately its upstreaming prospects.


Data Center Bandwidth Conversations Should Cover More than Volume


I often hear data center and bandwidth conversations focused on just one thing: volume. Focusing only on volume (1 Gig? 10 Gigs?) to determine your data needs, though, is a bit like focusing only on the number of seats when you’re buying a car. Yes, it’s an important number, but it’s only one of many factors a business should consider.

Other considerations that should be part of any data center bandwidth conversation include critical business needs, essential network features (including privacy), and the quality of your connection.

Start with Critical Business Needs

It’s hard to know how much bandwidth a business requires without knowing exactly what that business needs to do to be successful. This is why I recommend starting the conversation by identifying mission-critical applications and processes that rely on the internet or moving data between two or more locations.

These requirements vary widely by industry and business types – a SaaS organization is likely to need significant upload and download capabilities, while a payment processor may have special privacy concerns. A major sales organization may need high availability to use a platform like Salesforce. A consulting firm that uses its website primarily as an advertisement may need only a bare-bones connection.

To determine your organization’s critical needs, define what your employees couldn’t do their jobs without. Once you have a sense of that, it’s time to determine which kind of internet connection might best meet your data needs.

Consider Privacy, Security, Latency, and Redundancy

When you’ve defined what your employees need to be able to accomplish over your internet connection, it’s time to consider which type of connection might best meet their needs. If, for example, your business offers digital trading, low latency is going to be a high priority. This means you may want a direct fiber connection.

If you’re in healthcare or payments, privacy and security matter. This means you might want certain functions handled via an in-house data center or private cloud.

If uptime is your biggest concern, you’ll want fully redundant connections. At some point, after all, a serious storm or errant construction project will take down your primary connection. It happens all the time, unfortunately.

To return to the car analogy, there are many ways to get people from point A to point B, but the circumstances of their trip will dictate whether the best vehicle is a Ferrari or a Kia Rio. Just as with a car purchase, price will be a factor when purchasing bandwidth – but it shouldn’t be the only one. This brings me to my final point.

Consider the Provider

Once you’ve identified which kinds of connections will best serve your business needs, it’s time to choose an internet provider. Options have consolidated in the last decade, but businesses still have a fair number of choices. 

You’ll notice as you compare providers that there isn’t one set price for a gigabyte of data – but that doesn’t mean the least expensive option is the best. I recommend considering the following factors as you compare options:

  • Service and responsiveness: What will happen when you call your ISP to report an outage? Some will know before you do, report what they’re doing to fix it, and check in with progress updates. Others won’t know anything’s wrong until they get your call and won’t bother updating you at all. Be sure you know what to expect from the provider you choose.

  • Network setup: This can affect performance. If you aren’t comfortable evaluating a provider’s setup yourself, be sure to enlist someone who is so you can be confident that the provider you choose has the flexibility to accommodate your needs over time.

  • Relationship with the rest of the internet: At a certain point, some parts of internet infrastructure are shared among all service providers. Because of this, the relationship your carrier has with other participants matters. A bad relationship could end up hurting your business as you struggle to get quality service across multiple provider networks. Get clues to an ISP’s relationships with other players by searching the web for the ISP name and “peering” for news articles and other information. You’ll want to consider the network size, number of peers, number and geographic distribution of peering locations, etc. ASRank and Hurricane Electric also offer useful information.

To evaluate these factors, spend time talking with representatives from each provider you’re considering. Compare notes on who you talk to and what they say. If you’re in a building with multiple tenants, ask about their experiences with various providers.

Meet Your Data Needs by Thinking Beyond Volume

Just as different car buyers prioritize different features (safety, speed, fuel efficiency, etc.), different businesses have vastly different data needs. Notably, these go beyond simple measures of data volume.

As you seek the right bandwidth for your business, be sure to consider the full spectrum of your data and internet needs.

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Mesa 20.0-RC3 Released Along With Mesa 19.3.4 As The Latest Of The Stable Series


MESA --

New stable and development releases of Mesa3D are available for providing the latest open-source Linux graphics driver experience for OpenGL and Vulkan.

On the stable front, Mesa 19.3.4 is out as the newest point release in this driver series from Q4’2019. Mesa 19.3.4 has various RADV and ANV Vulkan driver fixes, a few Vulkan overlay fixes even, several AMDGPU winsys fixes, RadeonSI is now disabling display DCC over issues, and there are also a number of Valve ACO back-end fixes too. Overall, Mesa 19.3.4 is a pretty hefty stable update particularly for Intel ANV and Radeon RADV Vulkan driver users.

Meanwhile Mesa 20.0-RC3 is also available as the newest weekly development release towards Mesa 20.0 that is likely to be released within the next few weeks — potentially even next week. Mesa 20.0-RC3 has Vulkan overlay fixes, a number of RadeonSI / RADV / ACO fixes, Intel ANV Vulkan fixes, and other work but overall it’s settling down compared to earlier release candidates.


OpenSSH 8.2 Released With FIDO/U2F Support


FREE SOFTWARE --

OpenSSH 8.2 is out this Valentine’s Day as the leading SSH suite. Besides working to disable the SSH-RSA public key signature algorithm due to SHA1 collision attacks, OpenSSH 8.2 also comes with new features.

The shiny new feature of OpenSSH 8.2 is support for FIDO/U2F hardware authenticators. FIDO/U2F two-factor authentication hardware can now work with OpenSSH 8.2+, including ssh-keygen can be used to generate a FIDO token backed key. Communication to the hardware token with OpenSSH is managed by a middleware library specified via the SSH/SSHD configuration, including the option for its own built-in middleware for supporting USB tokens.

Besides FIDO/U2F support in OpenSSH 8.2, other changes in this release include further defenestrating SSH-RSA for certificate signatures, a new “Include” keyword for including additional sshd configuration files, various portability improvements, and a number of bug fixes.

More details on OpenSSH 8.2 via OpenSSH.com.


System76 Launches New AMD Threadripper Machine » Linux Magazine


The most successful retailer of Linux-based desktops, laptops, and servers has announced a new addition to their popular Thelio desktop lineup. The new option, part of the Thelio Major model, adds AMD’s 64 Core Threadripper 3990X CPU into the mix. This system can compile the Linux kernel in 24 seconds, apply a circular motion blur in 44 seconds, and render a Blender scene in 76 seconds. That’s incredibly fast.

The Threadripper Thelio Major has been optimized for the heat produced by the 280 watt, 64-Core CPU, which was a serious undertaking. System76 accomplished the task by using a 5.5″ duct that pulls air from inside the system, directs it across a heat sink, and then (drawing the heated air through copper piping) sends it out of the machine through the rear. This method compartmentalized the GPU and CPU heat sources as well as the air that is used to cool the individual chips.

The Thelio Major ships with Pop!_OS and can be customized to best fit your needs (GPU, RAM, storage). The Threadripper version of the Thelio Major starts at $3,798 USD, but can be maxed out to a whopping $14,131 USD.

If the Threadripper version of the Thelio Major is out of your price range, you can always opt for the basic Thelio model, which starts at $899 USD.

Original announcement: https://system76.com/threadripper



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