OpenACC is one of the prongs in a multi-prong strategy to get people to port the parallel portions of HPC applications to accelerators. …
OpenACC: Things Are Getting Simpler More Quickly was written by Timothy Prickett Morgan at .
Some expect the open source M&A wave to hit its apex next year. I say "why wait?"
Our world is evolving exceedingly fast these days. Within the last few years in what has been coined the fourth industrial revolution we have witnessed evolutionary developments. One of those fascinating advancements concerns the everyday things and devices now connected to the Internet, also known as the Internet of Things (IoT). However, while every invention brings brand new exciting opportunities, it also entails disadvantages and may result in possible adverse consequences, if the disadvantages are not taken notice of.
Certainly IoT first and foremost provides an opportunity for a more comfortable and organized life. People may enjoy the chance to not preoccupy themselves with, for instance, managing their morning routines that may include waking up at a specific time, preparing the breakfast, and so on. Nowadays when your alarm clock can be connected to the thermostat and the latter has the information about the heavy snowfall of the night, the alarm can automatically readjust itself to wake you up an hour earlier than planned so that you manage to get to work on time.
Other examples may include smart scheduling programs or fitness tracking watches. As a runner, I personally am at ease realizing that I do not have to Continue reading
The 5G network can provide a single user peak data rate speeds of 2.7 Gb/s, which could support services such as 8K live broadcasts.
The chip design is unique in the market because it supports legacy 2G, 3G, 4G LTE, and the various 5G specifications on one module.
The Ceph project is a unified distributed storage system providing applications with object, block, and file system interfaces.
As venture capital firm DP Fox began to migrate its business-critical applications to the cloud it needed a connectivity service that could keep up with its growing portfolio.
Of the 4.2 billion IPv4 addresses available in the global space, how many are used—or rather, how many are “alive?” Given the increasing usage of IPv6, it might seem this is an unimportant question. Answering the question, however, resolves to another question that is actually more important: how can you determine whether or not an IP address is in use? This question might seem easy to answer: ping every address in the address space. This, however, turns out to be the wrong answer.
Scanning the Internet for Liveness. SIGCOMM Comput. Commun. Rev. 48, 2 (May 2018), 2-9. DOI: https://doi.org/10.1145/3213232.3213234
This answer is wrong because a substantial number of systems do not respond to ICMP requests. According to this paper, in fact, some 16% of the hosts they discovered that would respond to a TCP SYN, and another 2% that would respond to a UDP packet shaped to connect to a service, do not respond to ICMP requests. There are a number of possible reasons for this situation, including hosts being placed behind devices that block ICMP packets, hosts being configured not to respond to ICMP requests, or a server sitting behind a PAT or CGNAT Continue reading
Stealthwatch, to me, is like having a Network Detective working in my very own network! I truly love Stealthwatch and I am playing with every chance I can get.
Disclaimer: I do not get commissions from you buying Stealthwatch nor am I part of the Cisco Business Unit for Stealthwatch. I just really honestly and for realsies super love it.
I tossed together a ~31 minute YouTube. Obviously you can watch the entire thing. Or… here you go for the big sections.
The twice-annual ranking of distributed computing systems based on the Linpack parallel Fortran benchmark, a widely used and sometimes maligned test, is as much a history lesson as it is an expectation always looking forward, with anticipation, to the next performance milestones in high performance computing. …
The Widening Gyre Of Supercomputing was written by Timothy Prickett Morgan at .
China wants fairness: Chinese President Xi Jinping called for international cooperation to make the Internet more “fair and equitable,” while also asserting the Chinese government’s authority to shape it, Reuters reports. Xi has pushed for his country’s “cyber sovereignty” while promoting “core socialist values” online. Chinese officials also promoted the idea that each country should choose its own Internet “governance model,” The Star says.
Drones for broadband: A U.K. company has begun using drones to build fiber broadband networks in remote areas, reports Computer Weekly. Openreach is using drones to lay fiber in remote areas of the Scottish Highlands, where river gorges have previously presented a challenge.
Encrypted chat busted: Dutch police have found a way to infiltrate IronChat, an encrypted chat service running on proprietary hardware, Gizmodo says. The police were able to read 258,000 messages on the service, which costs about US$1,700 for a six-month subscription. News reports suggest the encryption wasn’t as strong as the vendor may have claimed.
Saving the Web: World Wide Web creator Tim Berners-Lee has been pushing a new Contract for the Web, in hopes of defining the responsibilities that governments, companies and citizens each have on the Web. Shortlist.com examines Continue reading
It's been a while since we last wrote about Layer 3/4 DDoS attacks on this blog. This is a good news - we've been quietly handling the daily onslaught of DDoS attacks. Since our last write-up, a handful of interesting L3/4 attacks have happened. Let's review them.
In April, John tweeted about a gigantic 942Gbps SYN flood:
It was a notable event for a couple of reasons.
First, it was really large. Previously, we've seen only amplification / reflection attacks at terabit scale. In those cases, the attacker doesn't actually have too much capacity. They need to bounce the traffic off other servers to generate a substantial load. This is different from typical "direct" style attacks, like SYN floods. In the SYN flood mentioned by John, all 942Gbps were coming directly from attacker-controlled machines.
Secondly, this attack was truly distributed. Normal SYN floods come from a small number of geographical locations. This one, was all over the globe, hitting all Cloudflare data centers:
Thirdly, the attack seem to be partially spoofed. While our analysis was not conclusive, we saw random, spoofed source IP addresses in the largest internet exchanges. The above Hilbert curve shows the source IP Continue reading
By teaming up to address key technical and organizational issues, information and operational security teams can improve the resiliency and safety of their infrastructure systems.
These are challenging times for Intel. Long – and still – the dominant chip maker in the datacenter with its battle-tested Xeon processors, the company is now seeing challenges everywhere. …
Intel Doubles Down On Doubled Up Xeons For HPC was written by Jeffrey Burt at .
This blog post was initially sent to subscribers of my SDN and Network Automation mailing list. Subscribe here.
After publishing the Manual Work Is a Bug blog post, I got this feedback from Michele Chubirka explaining why automating changes in your network also increases network security:
Read more ...Debugging distributed systems with why-across-time provenance Whittaker et al., SoCC’18
This value is 17 here, and it shouldn’t be. Why did the get request return 17?
Sometimes the simplest questions can be the hardest to answer. As the opening sentence of this paper states:
Debugging distributed systems is hard.
The kind of why questions we’re interested in for this paper are questions of provenance. What are the causes of this output? Provenance has been studied in the context of relational databases and dataflow systems, but here we’re interested in general distributed systems. (Strictly, those where the behaviour of each node can be modelled by a deterministic state machine: non-deterministic behaviour is left to future work).
Relational databases have why-provenance, which sounds on the surface exactly like what we’re looking for.
Given a relational database, a query issued against the database, and a tuple in the output of the query, why-provenance explains why the output tuple was produced. That is, why -provenance produces the input tuples that, if passed through the relational operators of the query, would produce the output tuple in question.
One reason that won’t work in our distributed systems setting is that Continue reading
The countdown to the annual Supercomputing Conference has begun. As The Next Platform gears up to deliver in-depth analysis of this year’s most important HPC innovations, take a moment to plan your path at the show with some of our leading SC18 partners. …
What to See at Supercomputing 2018 was written by Nicole Hemsoth at .