Security is always changing and failure always exists. This toxic scenario requires a fresh perspective on how we think about operational security. We must understand that we are often the primary cause of our own security flaws. The industry typically looks at cybersecurity and failure in isolation or as separate matters. We believe that our lack of insight and operational Continue reading
wget --no-check-certificate https://github.com/sflow/host-sflow/releases/download/v2.0.17-1/hsflowd-opx_2.0.17-1_amd64.debThe sFlow agent requires very little configuration, automatically monitoring all switch ports using the following default settings:
sudo dpkg -i hsflowd-opx_2.0.17-1_amd64.deb
| Link Speed | Sampling Rate | Polling Continue reading |
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I will be teaching my first live training course at Safari Books Online on the 9th of March, starting at noon ET: How the Internet Really Works. It’s hard to describe the level and background for this training, as it will be all over the place; this is a bit of an experiment in this realm. The course description is—
This live training will provide an overview of the systems, providers, and standards bodies important to the operation of the global Internet, including the Domain Name System (DNS), the routing and transport systems, standards bodies, and registrars. For DNS, the process of a query will be considered in some detail, who pays for each server used in the resolution process, and tools engineers can use to interact DNS. For routing and transport, the role of each kind of provider will be considered, along with how they make money to cover their costs, and how engineers can interact with the global routing table (the Default Free Zone, of DFZ). Finally, registrars and standards bodies will be considered, including their organizational structure, how they generate revenue, and how to find their standards.
Sprint is increasing its capex by $1 billion for the quarter to pay for its network upgrades.
I’m soon to depart from Cisco Live Barcelona. It’s been a long week of fun presentations. While I’m going to avoid using the words intent and context in this post, there is one thing I saw repeatedly that grabbed my attention. ACI is eating Cisco’s world. And it’s coming for something else very soon.
Application-Centric Infrastructure has been out for a while and it’s meeting with relative success in the data center. It’s going up against VMware NSX and winning in a fair number of deals. For every person that I talk to that can’t stand it I hear from someone gushing about it. ACI is making headway as the tip of the spear when it comes to Cisco’s software-based networking architecture.
Don’t believe me? Check out some of the sessions from Cisco Live this year. Especially the Software-Defined Access and DNA Assurance ones. You’re going to hear context and intent a lot, as those are the key words for this new strategy. You know what else you’re going to hear a lot?
Contract. Endpoint Group (EPG). Policy.
If you’re familiar with ACI, you know what those words mean. You see the parallels between the data center Continue reading
AT&T to release its dNOS to Linux; Cisco buys BroadSoft; Aryaka and Radware team up.
Maybe Kenny Rogers was right in stating you gotta "know when to fold 'em."
AWS and Google also saw big cloud revenue gains.
Hey, it's HighScalability time:
If you like this sort of Stuff then please support me on Patreon. And I'd appreciate if you would recommend my new book—Explain the Cloud Like I'm 10—to anyone who needs to understand the cloud (who doesn't?). I think they'll learn a lot, even if they're already familiar with the basics.
Just before the large-scale GPU accelerated Titan supercomputer came online in 2012, the first use cases of the OpenACC parallel programming model showed efficient, high performance interfacing with GPUs on big HPC systems.
At the time, OpenACC and CUDA were the only higher-level tools for the job. However, OpenMP, which has had twenty-plus years to develop roots in HPC, was starting to see the opportunities for GPUs in HPC at about the same time of OpenACC was forming. As legend has it, OpenACC itself was developed based on early GPU work done in an OpenMP accelerator subcommittee, generating some bad …
OpenMP Has More in Store for GPU Supercomputing was written by Nicole Hemsoth at The Next Platform.
I mentioned The Network Collective previously when I responded to the very first episode of the videocast/podcast (what TWiT would call a netcast
). Since then the three founders and co-hosts (Jordan, Eyvonne and Phil) have published an impressive 20 community roundtable episodes and have somehow also found time to launch a History of Networking
series co-hosted by Russ White (yes, that Russ White).
I’m a bit of a nerd when it comes to computer history, and I love reading books that give the inside story about the birth of the personal computer, the story of Silicon Valley, the rise and fall of technology companies and so on. However, the history of networking is nowhere near as well covered, which is a real shame. Thankfully, The Network Collective are filling that gap handsomely with a list of guests so far that blows my mind. For example:
If you’ve ever heard of Vixie cron, BIND DNS, DNSSEC, the Internet Software Consortium (ISC), you’ve found things Mr Vixie has had his hands all over. It’s fascinating to hear him talking about the history of DNS adoption, and his role in maintaining BIND in a nascent Continue reading
A reverse merger with VMware would allow Dell Technologies to be traded publicly without going through a formal listing.
In 2017 we made two of our web optimisation products - Mirage and Rocket Loader - even faster! Combined, these products speed up around 1.2 billion web-pages a week. The products are both around 5 years old, so there was a big opportunity to update them for the brave new world of highly-tuned browsers, HTTP2 and modern Javascript tooling. We measured a performance boost that, very roughly, will save visitors to sites on our network between 50-700ms. Visitors that see content faster have much higher engagement and lower bounce rates, as shown by studies like Google’s. This really adds up, representing a further saving of 380 years of loading time each year and a staggering 1.03 petabytes of data transfer!
Cycling image Photo by Dimon Blr on Unsplash.
Mirage and Rocket Loader both optimise the loading of a web page by reducing and deferring the number of assets the browser needs to request for it to complete HTML parsing and rendering on screen.
Hi folks, in this final post on RHV and OVN I’m going to show you how to utilize everything we’ve learned and installed up to this point. We’ve installed the packages, now it’s just a matter of deploying some virtual machines and attaching them to the new OVN provided SDN. As before my colleague, Tony James walks us through the process. Let’s get started.
Like any other integration in Red Hat Virtualization, we access OVN by way of the External Provider feature. In short, the External Provider allows RHV to take advantage of resources managed by external sources, in this case SDN.
Let’s post the video first, the walk through follows:
The External Provider dialog is launched from the “tree” menu on the far left of the dashboard. We give the network a name and because the OVN controller was deployed on the RHV-M host, the external provider simply points at the local host and port 9696. The external provider type is “External Network Provider”, and the “Read Only” box is unchecked.
Under the “Network” tab, click “New” and enter a name for the new SDN. Check the “Create on external provider” Continue reading
