What Are Data Types Anyways?

There are actually quite a few resources out there for a novice programmer to learn about data types like strings, integers, floats, and more. The wikipedia page, as an example, covers a broad spectrum of potential meanings. Just about any book or tutorial focused on a particular programming language will start off by listing the types supported by that language. This makes sense, since they are the fundamental building block of being able to do pretty much anything in that language.

Nvidia shows off at Supercomputing 20

Nearly 70% of the 500 fastests supercomputers in the world as announced at the Supercomputing 20 conference this week are powered by Nvidia, including eight of the top 10.Among them was one named Selene that Nvidia built itself and that debuted at Number 5 on the semi-annual TOP500 list of the fastest machines. With top-end systems requiring 10,000 or more CPUs and GPUs, they are enormously expensive, so government or research institutions own the majority of them.That makes Selene all the more rare. It was built by and is based at Nvidia's Santa Clara, California, headquarters. (It’s widely believed there are many supercomputers in private industry that are not reported for competitive reasons.)To read this article in full, please click here

Nvidia shows off at Supercomputing 20

Nearly 70% of the 500 fastests supercomputers in the world as announced at the Supercomputing 20 conference this week are powered by Nvidia, including eight of the top 10.Among them was one named Selene that Nvidia built itself and that debuted at Number 5 on the semi-annual TOP500 list of the fastest machines. With top-end systems requiring 10,000 or more CPUs and GPUs, they are enormously expensive, so government or research institutions own the majority of them.That makes Selene all the more rare. It was built by and is based at Nvidia's Santa Clara, California, headquarters. (It’s widely believed there are many supercomputers in private industry that are not reported for competitive reasons.)To read this article in full, please click here

Vendor Lock-In. Maybe Not So Evil. (Video)

Is vendor lock-in all that bad? Many argue yes. You’re tied to a vendor because you’ve used some of their proprietary technology, and so you’re (apparently) stuck with it forever, limiting your future business agility. I think that’s an incomplete argument, though.

 

Tools 1. Top 5 tools for network performance troubleshooting

Hello my friend,

some time ago we’ve been recently engaged in the troubleshooting of the performance issues. Namely, the speed of the communication between the application’s endpoints in two data centres was not persistent. Instead, it was deviating a lot having multiple TCP retransmissions for certain flows. The issues was successfully solved, and we’d like to share with you the tools we have used to identify and validate various aspects of traffic forwarding.

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means, electronic, mechanical or photocopying, recording,
or otherwise, for commercial purposes without the
prior permission of the author.

Can automation help with performance troubleshooting?

Absolutely. During our network automation training we show how to utilise various Linux tools from configuration management tools (e.g. Ansible) and programming languages (Bash, Python). That gives you ready examples from our training, which you can use in your network immediately, and endless possibilities to create your own automated troubleshooting workflows.

Our network automation training has two faces: either live or self-paced. So you can choose yourself, what works better for you. On our side, we Continue reading

Briefings In Brief 098: Cisco Tetration Enables Microsegmentation And App Dependency Mapping

Cisco Tetration enables microsegmentation and application dependency mapping for on-premises and cloud applications. This Briefings In Brief explores essential details on Tetration, including how it works and how it fits with other products in Cisco's portfolio. This briefing is based on a Security Field Day presentation by Cisco on the Tetration product.

The post Briefings In Brief 098: Cisco Tetration Enables Microsegmentation And App Dependency Mapping appeared first on Packet Pushers.

Open Policy Agent for the Enterprise: Styra’s Declarative Authorization Service

Open Policy Agent (OPA, pronounced “oh-pa”) for cloud native environments was created, and policy enforcement in code became much more practical. Now, its developers, under their company, new three-tier product offering for Styra Declarative Authorization Service (DAS). Before diving into DAS, though, let’s make sure we’re all on the same page with OPA and policies in general. OPA is an open source, general-purpose policy engine that unifies policy enforcement across the stack. You write these policies in its high-level declarative language Datalog query language. With Rego, you can specify policy as code and create simple APIs to offload policy decision-making from your software. You can then use OPA to enforce policies in microservices, Kubernetes, CI/CD pipelines, API gateways, and more. And, what’s a policy engine you ask?

Contributing to the Internet Society Governance Reform Working Group

[Published on behalf of the Internet Society Board of Trustees]

As we announced some time ago, the Board of Trustees of the Internet Society (ISOC) has established the Governance Reform Working Group in order to host open community discussion on the general topic of potential governance changes at the Internet Society. We would like to welcome all members of any Internet Society Chapter, Organization Member, SIG, as well as individual members and IETF participants to contribute to this effort. Please, find the initial charter for the working group at:
https://www.internetsociety.org/board-of-trustees/governance-reform-working-group-charter/

Olga Cavalli and Mike Godwin will be the chair and vice-chair of the working group, respectively. You can subscribe to the working group’s mailing list in order to contribute to the discussion on the following link (where you can also check the mailing list archives) :
https://elists.isoc.org/mailman/listinfo/governance-reform

The post Contributing to the Internet Society Governance Reform Working Group appeared first on Internet Society.

Day Two Cloud 075: Operationalizing Your Hybrid Cloud With VMware vRealize (Sponsored)

Consistency is key for your cloud operations team and your end users (be they employees, customers, or developers). On today's Day Two Cloud episode with sponsor VMware, we discuss how to implement consistent operations for your hybrid cloud. Our guests from VMware are Brandon Gordon, Staff Technical Marketing Architect; and Matt Bradford, Sr. Technical Marketing Manager.

The post Day Two Cloud 075: Operationalizing Your Hybrid Cloud With VMware vRealize (Sponsored) appeared first on Packet Pushers.

IBM sharpens its hybrid cloud, AI focus with Instana buy

IBM has announced a definitive agreement to acquire Instana, an application performance monitoring firm. Financial details were not disclosed.Once the acquisition closes, Instana's technology will be incorporated into IBM's hybrid cloud and artificial intelligence portfolios – two markets IBM leadership has targeted for high growth in the coming years. To that end, IBM recently said it would spin off the $19 billion Managed Infrastructure Services unit of its Global Technology Services division to help the company focus on hybrid cloud, AI and quantum computing. Read more:To read this article in full, please click here

Introducing the Ansible Content Collection for Red Hat OpenShift

Increasing business demands are driving the need for automation to support rapid, yet stable and reliable deployments of applications and supporting infrastructure.  Kubernetes and cloud-native tools have quickly emerged as the enabling technologies essential for organizations to build the scalable open hybrid cloud solutions of tomorrow. This is why Red Hat has developed the Red Hat OpenShift Container Platform (OCP) to enable enterprises to meet these emerging business and technical challenges. Red Hat OpenShift brings together Kubernetes and other cloud-native technologies into a single, consistent platform that has been fine-tuned and enhanced for the enterprise. 

There are many similarities to how Red Hat OpenShift and Red Hat Ansible Automation Platform approach their individual problem domains that make a natural fit when we bring the two together to help make hard things easier through automation and orchestration.

We’ve released the Ansible Content Collection for Red Hat OpenShift (redhat.openshift) to enable the automation and management of Red Hat OpenShift clusters. This is the latest edition to the certified content available to subscribers of Red Hat Ansible Automation Platform in the Ansible Automation Hub.

In this blog post, we will go over what you’ll find in redhat.openshift Continue reading

Onno Purbo: 2020 Postel Award Winner Uses Human Touch to Bridge the Digital Divide

Onno Purbo is a people person. It’s not typically something you hear about an engineer. But it is through his approach to education in the Internet sphere that Indonesian villages have access at all.

“The other engineers, they are very much engineer,” Purbo said. “A problem is solved by coding, is solved by an antenna, is solved by a product of some kind. My approach is a more human approach. Most engineers introduce their products, I give people the knowledge.”

Purbo, as this year’s Jonathan B. Postel Award winner, uses his experience, knowledge, and expertise not only to build networks and improve access for his fellow Indonesians, but to teach them how to do it themselves. He does this through hours of work on social media channels, speaking one-on-one with hundreds of thousands of followers whenever they have questions or concerns.

“I use social media as a free, huge class[room]. Effective and efficient empowerment processes were not possible with the old mechanism where we would rent rooms or buildings with professional event organizers,” Purbo said. “These days, for example, thousands of viewers may easily view any of my videos on YouTube.”

With nearly 700,000 followers on social Continue reading

Network-layer DDoS attack trends for Q3 2020

Network-layer DDoS attack trends for Q3 2020
Network-layer DDoS attack trends for Q3 2020

DDoS attacks are surging — both in frequency and sophistication. After doubling from Q1 to Q2, the total number of network layer attacks observed in Q3 doubled again — resulting in a 4x increase in number compared to the pre-COVID levels in the first quarter. Cloudflare also observed more attack vectors deployed than ever — in fact, while SYN, RST, and UDP floods continue to dominate the landscape, we saw an explosion in protocol specific attacks such as mDNS, Memcached, and Jenkins DoS attacks.

Here are other key network layer DDoS trends we observed in Q3:

  • Majority of the attacks are under 500 Mbps and 1 Mpps — both still suffice to cause service disruptions
  • We continue to see a majority of attacks be under 1 hr in duration
  • Ransom-driven DDoS attacks (RDDoS) are on the rise as groups claiming to be Fancy Bear, Cozy Bear and the Lazarus Group extort organizations around the world. As of this writing, the ransom campaign is still ongoing. See a special note on this below.

Number of attacks

The total number of L3/4 DDoS attacks we observe on our network continues to increase substantially, as indicated in the graph below. All in all, Continue reading

Giant space antenna designed to beam 5G to Earth

Cambridge Consultants is working to deliver the largest airborne communications antenna available commercially.The technology consultancy and product development firm, which part of Capgemini, has built a functioning, scaled-down version of a wireless antenna designed to beam connectivity from the sky. The prototype, announced this month, is part of a four-year project with UK-based start-up Stratospheric Platforms Limited (SPL).SPL is developing a High-Altitude Platform (HAP) and communication system that's designed to deliver affordable, fast connectivity. The HAP aircraft system, as envisaged, would beam its Internet from the stratosphere, which is the second major layer of Earth's atmosphere. The aircraft, with a 60-meter wingspan, would be powered by hydrogen and could deliver nine days of flight stamina. Each HAP could supply coverage over an area of up to 140 kilometres in diameter, and around 60 aircraft could blanket a country the size of the U.K., according to Cambridge Consultants.To read this article in full, please click here