What is a Linux ‘oops’?

If you check the processes running on your Linux systems, you might be curious about one called "kerneloops." And that’s “kernel oops,” not “kerne loops” just in case you didn’t parse that correctly.Put very bluntly, an “oops” is a deviation from correct behavior on the part of the Linux kernel. Did you do something wrong? Probably not. But something did. And the process that did something wrong has probably at least just been summarily knocked off the CPU. At worst, the kernel may have panicked and abruptly shut the system down.For the record, “oops” is NOT an acronym. It doesn’t stand for something like “object-oriented programming and systems” or “out of procedural specs”; it actually means “oops” like you just dropped your glass of wine or stepped on your cat. Oops! The plural of "oops" is "oopses."To read this article in full, please click here

What is a Linux “oops”?

If you check the processes running on your Linux systems, you might be curious about one called "kerneloops". And that’s “kernel oops”, not “kerne loops” just in case you didn’t parse that correctly. Put very bluntly, an “oops” is a deviation from correct behavior on the part of the Linux kernel. Did you do something wrong? Probably not. But something did. And the process that did something wrong has probably at least just been summarily knocked off the CPU. At worst, the kernel may have panicked and abruptly shut the system down.For the record, “oops” is NOT an acronym. It doesn’t stand for something like “object-oriented programming and systems” or “out of procedural specs”; it actually means “oops” like you just dropped your glass of wine or stepped on your cat. Oops! The plural of "oops" os "oopses".To read this article in full, please click here

BrandPost: 5 benefits of SD-WAN optimization

SD-WAN is quickly approaching mainstream adoption by enterprises; Ovum’s research finds that about one-third of enterprises are trialing or using the technology. Once service providers gain SD-WAN experience, they also find the technology a versatile tool for their broader platform, services, and architecture plans.Interoute, a pan-European and global operator of network and cloud services, provides an example. At the beginning of 2017, the company updated its Enterprise Digital Platform – an evolution of the operator’s edge, core, and cloud offerings designed to fit together and accelerate enterprises’ end-to-end performance – with fully featured SD-WAN as an integral component. The provider’s platform offers customers commercial and service-level flexibility through a mix of on- and off-net, public internet, and private IP sites to a common fabric, and it optimizes performance of application delivery, including optional WAN optimization.To read this article in full, please click here

On the ‘net: Rethinking Firewalls

In January of 1995, Network Translation’s PIX firewall received the “hot product of the year” award from Data Communications Magazine. While the PIX was originally designed to perform Network Address Translation (NAT), doing for the IP host market what the PBX market did for the telephone, the PIX itself quickly morphed into the original appliance-based firewall. In those heady days in the Cisco Technical Assistance Center (TAC), we spent hours thinking through how best to build a Demilitarized Zone (DMZ) using PIX’s and routers so the network simply could not be penetrated. We built walls around our networks to defend them against the hoards of horseback riding invaders. @ECI

Docker Compose and Kubernetes with Docker for Desktop

If you’re running an edge version of Docker on your desktop (Docker for Mac or Docker for Windows Desktop), you can now stand up a single-node Kubernetes cluster with the click of a button. While I’m not a developer, I think this is great news for the millions of developers who have already been using Docker on their Macbook or Windows laptop because they now have a fully compliant Kubernetes cluster at their fingertips without installing any other tools.

Developers using Docker to build containerized applications often build Docker Compose files to deploy them. With the integration of Kubernetes into the Docker product line, some developers may want to leverage their existing Compose files but deploy these applications in Kubernetes. There is, of course, Kompose, but that’s a translation layer which causes you to have two separate artifacts to manage. Is there a way to keep a native Docker-based workflow?

With Docker on the desktop (as well as Docker Enterprise Edition) you can use Docker compose to directly deploy an application onto a Kubernetes cluster.

Here’s how it works:

Let’s assume I have a simple Docker compose file like the one below that describes a three tier Continue reading

Don’t miss our online live Spanning-Tree Webinar!

Tune in Tomorrow, February 16, 2018 for a FREE online live Spanning-Tree webinar with Keith Bogart.

 

Deciphering Spanning-Tree Technologies
Starts February 16, 2018 at 10:00 AM (PST) 1:00 PM (EST)

Understanding the logic of 802.1d and how it builds a loop-free “tree” is critical to passing any Cisco certification exam. Presented by INE instructor Keith Bogart (CCIE #4923), this session will take you through that logic so that, given any bridged/switched layer-2 network, you can predict what tree will be formed. Ask questions live with an experienced industry expert!

Inference is the Hammer That Breaks the Datacenter

Two important changes to the datacenter are happening in the same year—one on the hardware side, another on the software side. And together, they create a force big enough to blow away the clouds, at least over the long haul.

As we covered this year from a datacentric (and even supercomputing) point of view, 2018 is the time for Arm to shine. With a bevy of inroads to commercial markets at the high-end all the way down to the micro-device level, the architecture presents a genuine challenge to the processor establishment. And now, coupled with the biggest trend since …

Inference is the Hammer That Breaks the Datacenter was written by Nicole Hemsoth at The Next Platform.

Gen-Z Interconnect Ready To Restore Compute Memory Balance

For several years, work has been underway to develop a standard interconnect that can address the increasing speeds in servers driven by the growing use of such accelerators as GPUs and field-programmable gate arrays (FPGAs) and the pressures put on memory by the massive amounts of data being generated and bottleneck between the CPUs and the memory.

Any time the IT industry wants a standard, you can always expect at least two, and this time around is no different. Today there is a cornucopia of emerging interconnects, some of them overlapping in purpose, some working side by side, to break …

Gen-Z Interconnect Ready To Restore Compute Memory Balance was written by Jeffrey Burt at The Next Platform.

Worth Reading: DNS resolution to protect networks

The vast majority of DNS Resolvers perform its one core function – taking a unique domain name and resolved queries for these names into IPv4/IPv6 addresses for the purpose of locating computer services and devices worldwide. This is why DNS is Internet critical. Every device is dependent on a DNS Resolver for normal Internet functioning – creating a critical dependency and choke point. —Barry Greene @ Senki

IDG Contributor Network: Leveraging a hybrid cloud model to cope with data growth

In “What the storage industry’s inevitable transition to the cloud means for your business,” I cited the explosive growth of data as one of the primary reasons for a shift in storage architectures from local hardware to the cloud.Let’s take a closer look at this phenomenon and how it impacts your approach to storage, as well as what architecture is the right one for your current and future needs.And what a phenomenon it is! IDC and EMC project that data will grow to 40 zettabytes by 2020, resulting in a 50-fold growth from the beginning of 2010. And forget about the importance of data simply for your business. In a recent white paper for storage firm Seagate, research firm IDC estimates that by 2025, nearly 20 percent of the data in existence will be critical to our everyday lives, with almost 10 percent of that being “hypercritical.”To read this article in full, please click here

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