Verizon’s Exponent Acts as a Software Company Inside the Carrier
Verizon is selling software it's developed for its own networks to other carriers.
AT&T Eyes Late 2018 for Commercial 5G Services
Unlike Verizon, AT&T says its 5G will be standards compliant.
Ciena to Launch Tools for Its Optical Networking Customers
Ciena is responding to the way running a network is changing.
Assert() in the hands of bad coders
Using assert() creates better code, as programmers double-check assumptions. But only if used correctly. Unfortunately, bad programmers tend to use them badly, making code worse than if no asserts were used at all. They are a nuanced concept that most programmers don't really understand.We saw this recently with the crash of "Bitcoin Unlimited", a version of Bitcoin that allows more transactions. They used an assert() to check the validity of input, and when they received bad input, most of the nodes in the network crashed.
The Bitcoin code is full of bad uses of assert. The following examples are all from the file main.cpp.
Example #1: this line of code:
- if (nPos >= coins->vout.size() || coins->vout[nPos].IsNull())
- assert(false);
This use of assert is silly. The code should look like this:
- assert(nPos < coins->vout.size());
- assert(!coins->vout[nPos].IsNull());
This is the least of their problems. It understandable that Continue reading
Applied Networking Research Workshop – Paper Submission Deadline: 3 April
We’re excited to share news of the second Applied Networking Research Workshop (ANRW2017), which will take place in Prague, Czech Republic, on July 15. This one-day workshop will be co-sponsored by the Association for Computing Machinery (ACM), the Internet Society and the Internet Research Task Force (IRTF). The Call for Papers is open now, with a deadline of 3 April.
Mat Ford
Fast Convergence and the Fast Reroute – Definitions/Design Considerations in IP and MPLS
Fast Convergence and the Fast Reroute Network reliability is an important design aspect for deployability of time and loss sensitive applications. When a link, node or SRLG failure occurs in a routed network, there is inevitably a period of disruption to the delivery of traffic until the network reconverges on the new topology. Fast reaction is essential […]
The post Fast Convergence and the Fast Reroute – Definitions/Design Considerations in IP and MPLS appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Architecture of Probot – My Slack and Messenger Bot for Answering Questions
I programmed a thing. It’s called Probot. Probot is a quick and easy way to get high quality answers to your accounting and tax questions. Probot will find a real live expert to answer your question and handle all the details. You can get your questions answered over Facebook Messenger, Slack, or the web. Answers start at $10. That’s the pitch.
Seems like a natural in this new age of bots, doesn’t it? I thought so anyway. Not so much (so far), but more on that later.
I think Probot is interesting enough to cover because it’s a good example of how one programmer--me---can accomplish quite a lot using today’s infrastructure.
All this newfangled cloud/serverless/services stuff does in fact work. I was able to program a system spanning Messenger, Slack, and the web, in a way that is relatively scalabile, available, and affordable, while requiring minimal devops.
Gone are the days of worrying about VPS limits, driving down to a colo site to check on a sick server, or even worrying about auto-scaling clusters of containers/VMs. At least for many use cases.
Many years of programming experience and writing this blog is no protection against making mistakes. I made a Continue reading
Docker to donate containerd to the Cloud Native Computing Foundation
Today, Docker announced its intention to donate the containerd project to the Cloud Native Computing Foundation (CNCF). Back in December 2016, Docker spun out its core container runtime functionality into a standalone component, incorporating it into a separate project called containerd, and announced we would be donating it to a neutral foundation early this year. Today we took a major step forward towards delivering on our commitment to the community by following the Cloud Native Computing Foundation process and presenting a proposal to the CNCF Technical Oversight Committee (TOC) for containerd to become a CNCF project. Given the consensus we have been building with the community, we are hopeful to get a positive affirmation from the TOC before CloudNativeCon/KubeCon later this month.
Over the past 4 years, the adoption of containers with Docker has triggered an unprecedented wave of innovation in our industry: we believe that donating containerd to the CNCF will unlock a whole new phase of innovation and growth across the entire container ecosystem. containerd is designed as an independent component that can be embedded in a higher level system, to provide core container capabilities. Since our December announcement, we have focused efforts on identifying the Continue reading
Docker Donates Containerd to Cloud Native Computing Foundation
Containerd has been the heart of the Docker platform since April 2016.