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ZFS from a MySQL perspective
As the purpose of a database system is to store data, there is close relationship with the filesystem. Yves Trudeau reconsiders the use of ZFS with MySQL.
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A Deep Dive into HandBrake and Video Transcoding
An obvious interest area of mine is in ripping (and watching) movies using my Mac. I've talked about everything from installing the tools I use to how I rip to how to make sure I update the ripping tools . And though I've included some comparison pictures in the how-I-rip article, I've never done a deep dive into the…
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Debugging macOS Kernel Using VirtualBox
Update: In the HN discussion, awalton mentioned you can set CPUID flags in VMWare. Simply adding cpuid.7.ebx = "-----------0--------------------" to the vmx file will disable SMAP. Late last year, I upgraded my old MBP to the 2016 model with a Skylake processor. As I was debugging a kernel exploit, it turned out that…
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Epoll is fundamentally broken
This time we'll focus on Linux's select(2) successor - the epoll(2) I/O multiplexing syscall.
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Fedora 26 released
[This message comes from the desk of the Fedora Project Leader directly. Happy release day! — Ed.] Hi everyone! I’m incredibly proud to announce the immediate availability of Fedora 26. Read more below, or just jump to download from: Get Fedora 26 Workstation Get Fedora 26 Server Get Fedora 26 Atomic Host ← includes…
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Decommissioned mobile devices as cheap energy-efficient compute nodes
The performance of mobile phone processors has been steadily increasing, causing the performance gap between server and mobile processors to narrow with mobile processors sporting superior performance per unit energy. Fueled by the slowing of Moore’s Law, the overall performance of single-chip mobile and server…
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Reducing power consumption for background tabs
Efficient power usage is an important aspect of speed, one of Chrome’s key pillars . To prolong battery life, Chrome should minimize power ...
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Facebook Trains ImageNet in 1 Hour
Facebook published a paper today detailing how they are able to train nearly 1.3 million images in under an hour using 256 Tesla P100 GPUs that previously took days on a single system.
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There's a mini RTOS in my language
AdaCore is the leading provider of commercial software solutions for Ada, C and C++ — helping developers build safe and secure software that matters.
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Software architecture is failing
I doubt there has ever been a time when software architecture was seen as a raging success. The “three-tier architecture” of the web has held up extremely well and is an excellent place for many people to start. The “12 Factor App” approach has encouraged developers to adopt practices that make deployment and scaling…
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Filesystem error handling
We’re going to reproduce some results from papers on filesystem robustness that were written up roughly a decade ago : Prabhakaran et al. SOSP 05 paper , which injected errors below the filesystem and Gunawi et al. FAST 08 , which looked at how often filesystems failed to check return codes of functions that can…
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OpenBSD and the modern laptop
Did you think that OpenBSD is suitable only for firewalls and high-security servers? Think again. Here are my steps to transform a modern m...
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Redshift Spectrum – Exabyte-Scale In-Place Queries of S3 Data
Now that we can launch cloud-based compute and storage resources with a couple of clicks, the challenge is to use these resources to go from raw data to actionable results as quickly and efficiently as possible. Amazon Redshift allows AWS customers to build petabyte-scale data warehouses that unify data from a variety…
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On Disk IO, Part 3: LSM Trees
If you like the series, check out my book on Database Internals!
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Red Hat Introduces Arm Server Support for Red Hat Enterprise Linux
Today marks a milestone for Red Hat Enterprise Linux with the addition of a new architecture to our list of fully supported platforms. Red Hat Enterprise Linux for ARM is a part of our multi-architecture strategy and the culmination of a multi-year collaboration with the upstream community and our silicon and hardware…
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Linux Bridge – How it works
developer. curious. learner
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Mosaic: processing a trillion-edge graph on a single machine
Mosaic: Processing a trillion-edge graph on a single machine Maass et al., EuroSys’17 Unless your graph is bigger than Facebook’s, you can process it on a single machine. With the incep…
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AWS EC2 Virtualization 2017: Including Nitro
AWS EC2 Virtualization 2017: explaining the different virtualization types, from emulation and binary substitution, paravirtualization and Xen, PV, HVM, and PVHVM modes, and the new Nitro hypervisor
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Debian port for RISC-V 64-bit
This is a post describing my involvement with the Debian GNU/Linux port for RISC-V (unofficial and not endorsed by Debian at the moment) and announcing the availability of the repository (still very much WIP) with packages built for this architecture. If not interested in the story but you want to check the…
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Searching for the killer app of unikernels
When a radically different technology comes along it usually takes time before we figure out how to apply it. When we had steam engines running factories there was one engine in each factory with a giant driveshaft running through the whole factory. When the electric engine came along people started replacing the…
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What is Windows doing while hogging that lock?
Earlier this month I wrote about how Windows 10 holds a lock during too much of process destruction, which both serializes this task and causes mouse-cursor hitches and UI hangs (because the same l…
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Event-Driven Architecture
Using events to design applications is a practice that seems to be around since the late 1980s. We can use events anywhere in the frontend or backend. When a button is pressed, when some data chang…
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Awk for multimedia
(… and for system graphics, games and other interactive applications but that would make the title just a bit too long…) Many of the articles here have focused on the use of Arcan as a …
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x86: Approaching 40 and still going strong
Intel Newsroom delivers the latest news, announcements, and updates. Stay informed on Intel innovations.
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Formal Methods in Practice: Using TLA+ at ESpark
Using TLA+ at eSpark Learning
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Preventing server overload: limit requests being processed
Recently at Bluecore I ran into a familiar situation: during brief periods of overload, all requests to a server were timing out. It was a catastrophic failure, where the server completely stopped serving. We added more capacity to prevent overload, but we also wanted to fix the server. Instead of exploding, it should…