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Black Friday Deals on Docker + Kubernetes Courses

In honor of Black Friday, America’s favorite shopping holiday, we’ve rounded up the best deals on Docker + Kubernetes learning materials from Docker Captains. Docker Captain is a distinction that Docker awards to select members of the community that are both experts in their field and are committed to sharing their Docker knowledge with others.

Books:

Learn Docker in a Month of Lunches, Elton Stoneman (Save 40% with the code webdoc40).

Docker in Action Second Edition (2019), Jeff Nickeloff (Save 50% with the code tsdocker).

Manning publications is also offering half off when you spend $50 this week.

Nigel Poulton’s The Kubernetes Book and Docker Deep Dive ebook bundles is $7 (for both!) through December 1st with this link.

Self-Paced Online Courses:

All of Bret Fisher’s courses are $9.99 through Friday, November 29th. Choose from Docker Mastery, Kubernetes Mastery, Swarm Mastery, and Docker for Node.js.

Elton Stoneman has a wealth of courses, from Handling Data and Stateful Applications in Docker to Modernizing .Net Framework Apps with Docker on Pluralsight. Get 40% an annual or premium subscription through Friday November 29th.

Nick Janetakis’ Dive into Docker and Build Web Applications with Flask and Docker Continue reading

Can Kubernetes Orchestrate the Infrastructure?

Portworx sponsored this post. Is it possible that managing stateful applications on Kubernetes will become easier than handling the stateless apps containers were originally designed for? Portworx, said that’s what customers are telling him. When it comes to encouraging the adoption of Kubernetes in production in an enterprise setting, that is good news, but not something everyone would agree with. In a recent poll by The New Stack, 10% of respondents thought that improving Kubernetes’ integration with storage was the top challenge for the community — after concerns about user experience and support for multitenancy. But Thirumale isn’t the only one who thinks the Kubernetes ecosystem is ready for stateful workloads. “People are starting to do serious stateful workloads in the cloud and in Kubernetes, in particular,” SoundCloud | Pocket Casts | Apple Podcasts | Spotify |

BrandPost: Branch Office SD-WAN Availability: Last-Mile Considerations

MPLS is showing its age in the era of digital transformation. SD-WAN’s agility, low cost, and direct branch office cloud access increasingly make more sense for global, cloud-enabled organizations. The big question for many IT leaders is: Can SD-WANs and their Internet last-mile connections match MPLS’s availability to serve as an MPLS alternative?The short answer? Yes. Here’s why.MPLS’s Last-Mile Availability Problem MPLS has long been known for its uptime. As managed services that’s no surprise; the telcos do a very good job keeping an eye on the core of their networks. But what’s often a surprise to outsiders is the problem MPLS services have with the last mile. The high cost of MPLS services makes it impractical to equip branch offices with redundant last-mile MPLS connections, and without redundancy delivering on uptime is challenging. And even with Internet backup, failover is often manual or slow enough to disrupt the user experience.To read this article in full, please click here

Deep Dive: A Look at Top Retailers’ Security Practices

In April 2019 the Internet Society’s Online Trust Audit released its 10th Online Trust Audit and Honor Roll. One of the longest-running sectors covered in the Audit is online retailers. In this blog post we will look at the top 500 online retailers in the US based on online sales and how they fare in security best practices advocated by OTA.

Overall 65% of online retailers in the top 500 made the honor roll this year, a marked improvement over 2017 when just over half (51%) did. With the upcoming holidays many consumers will be doing much of their shopping online, therefore it is more important than ever that any online retailer practices good email and site security. After all, consumers are sending highly-sensitive data like credit cards and addresses at a much higher rate during the holidays.

In site security retailers fared well, as did most sites. Fully 92% of the top 500 online retailers has AOSSL/HSTS on their sites (virtually the same as 91% of sites overall). The good news this year is that this is a significant increase over the the 38% that had AOSSL/HSTS in 2017. The bad news is that the fact that this is Continue reading

Heavy Networking 489: Is BBR Too Unfair An Algorithm For The Internet?

BBR is a congestion control algorithm (CCA) that's growing in use on the Internet. However, a design element in BBR starves competing CCAs for bandwidth on shared links, allowing BBR to consume more than its fair share. On today's Heavy Networking we speak with researchers at Carnegie Mellon University who have measured BBR's unfairness. We discuss the research, learn how BBR differs from legacy algorithms such as Cubic and Reno, and explore impacts to the Internet. Our guests are Ranysha Ware, Ph.D. student; and Justine Sherry, Associate Professor of Computer Science.

The post Heavy Networking 489: Is BBR Too Unfair An Algorithm For The Internet? appeared first on Packet Pushers.

Inphi launches DSPs for long-distance 400Gb networking

Inphi, a developer of high-speed data interconnects, announced it has begun sampling its new Canopus coherent digital signal processor (DSP), which it claims reduces power draw by up to 75 percent and triples the throughput of data over fiber networks, especially over long distances.The Canopus processor comes on a plug-in module about the size of a cigarette lighter that goes in existing networking equipment. The chip is built on a 7nm manufacturing process, and its silicon geometry delivers over 75 percent reduction in DSP power dissipation and size as compared to the current generation of coherent DSPs.Coherent optical transmission is a technique for transporting considerably more information through a fiber optic cable, and is especially popular when transporting over long distances. It uses modulation and phases of the light to amplify transmission. A DSP is often needed to manage and clean up the photonics.To read this article in full, please click here

LFN 5G Demo Designed To Excite Kubernetes Community

“It has been a bit of a challenge to get that community excited about telecom and to get excited...

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Ask these questions before you replace any technology in your network !

If you are replacing one technology with the other, these questions you should be asking.

This may not be the complete list and one is maybe more important than the other for your network , but definitely keep in mind or come back to this post and check before you replace one technology with another one !

Is this change really needed ? Is there a valid business case ?

First and most important question, because we are deciding whether this change is absolutely necessary. If the technology which you will migrate won’t bring any business benefit (OPEX, CAPEX , New Revenue Stream etc.) then existing technology should stay.

This is true for the new software release on the routers as well. If there is no new feature which you need to use with the new software release and if there is no known bug that effects the stability of the network, having a longer software lifecycle is better than upgrading the software frequently.

What is the potential impact to overall network ?

New technology might require extra resource usage on the network. Can your network devices accommodate this resource usage growth ? Opposite is true as well. New technology Continue reading

Please don’t register to South Africa/Johannesburg CCDE Class, it is full !

Hi Everyone,

I would like to inform you that Instructor Led CCDE Class in South Africa/Johannesburg Training is full. So please don’t register for it.

Having more people will reduce the time required for discussions. Those who attended any of my earlier class know that we have already very packed agenda, approximately 2000 pages documents and so many real life discussions in 5 days. Hopefully we will schedule another training session in SA next year, and please when I announce, just hurry up for registration.

I will be in Johannesburg between May 13 – 18, if you would like to meet me, please send me an email to [email protected]

Even if you are not considering any network design training, still that is okay, would like to meet and know as many network engineer as I can while still I am able to

The post Please don’t register to South Africa/Johannesburg CCDE Class, it is full ! appeared first on orhanergun.net.

Telecom Operator Network Design Training

I missed writing , missed writing a post lot on the website specifically !. Because I know you are reading right now and wonder where I have been.

I just checked and seen that my last post was on October 26. More than 2 months , I didn’t share anything on the website. I wanted to come here and share something , technical or social , but believe me guys November and December 2017 was so busy from my side.

One of the activity which took my time during this period was Telecom Operator design training which I did in Kenya/Nairobi on November. Safaricom Kenya – Incumbent Telecom Operator/Internet Service Provider.

It was 5 days training and IP/MPLS Backbone planners , Transport network engineers, mobile access and core engineers , fix and mobile wireless service engineers (They have very good fiber penetration in the country) many people attended this training.

Most of the topics were from my CCDE training blueprint but after couple discussions with their lead engineers, we removed CCDE Practical scenarios and couple other topics , as they won’t attend CCDE exam , but added other technologies which they are considering to implement and some of those technologies is Continue reading

CCDE Practical/Lab Exam Result Policy

Many of my students have been asking whether CCDE Practical/Lab Exam Result policy is still the same.

As you might know after CCDE 2017 May exam cancellation , practical exam results can be learned after 8 to 12 weeks. This mean, if you attend CCDE Practical exam, you cannot learn the result (Pass or fail) on the same day. It was the case until CCDE 2017 May exam.

You used to finish the 8 hours exam and when you click the end exam button, exam result was just there !

This is not the case anymore. Last CCDE Practical exam was on November 2017 and the attendees are still waiting their results as of today. There is no any new announcement by Cisco and I would expect the same thing for February 27, 2018 CCDE Practical exam.

Learning exam result is good probably for the exam security but I hear complaints from the students and i think some of my readers are thinking the same.

They say, if they knew that they failed , they could schedule the next exam. Exam results of the previous one arrives right before the next one , thus , candidates cannot find a time to Continue reading

What is GLBP and where GLBP should be used?

GLBP stands for Gateway Load Balancing Protocol. In this article, I will explain where GLBP is used , where it shouldn’t be used with the topologies.

GLBP is a Cisco preparatory protocol. In most networks, design requirements might be to use only standard based protocols. If that is the case, GLBP is not a standard based protocol and business cannot use it.

Unlike HSRP and VRRP, GLBP supports flow based load balancing.

HSRP and VRRP can only supports active/standby redundancy or Vlan based load balancing.

GLBP was invented to provide an active-active traffic forwarding the network traffic but there is almost no use case in today networks.

In some cases, GLBP has create more problem than it should solve.

Figure – GLBP at the Enterprise Internet Edge

In the above picture, I depict classical Enterprise Internet edge network. Firewall, Layer 2 switch and Internet Gateways.

Service Providers don’t use stateful devices such as Firewall at the Internet edge.

If in this network, GLBP is used, firewall would send an ARP for the default gateway and only one of the Internet Gateway routers would be used as a default gateway. If there would be two firewalls, another firewall could Continue reading

What is Urban and Rural area in networking ?

What is urban and rural area ? What is underserved area in networking ?

These definitions are heavily used in networking. And all broadband network designers take always these definitions into an account while they do their design. I think knowing these definitions as a network engineer is valuable for you.

In general, a rural area or countryside is a geographic area that is located outside towns and cities

Whatever is not urban is considered rural area though some people uses less populate than urban but more populated than rural area as suburban area

Typical urban areas have a high population and large settlements

Typical rural areas have a low population density and small settlements

Underserved areas where there is no good network coverage (Broadband , Voice or any other data types)

Unserved areas where there is no network coverage at all

For example,if mobile operator will place a cell sites in an urban area, since the population density will be too high, they consider to place more cell sites than if they place those cell sites in a rural area.

FTTx planers consider to change their ODN (Optical Distribution Network) design entirely depends on they are doing FTTx deployment in Continue reading

The IPv4 party is over

The post The IPv4 party is over appeared first on Noction.

Is There a Future for Networking Engineers?

Someone sent me this observation after reading my You Cannot Have Public Cloud without Networking blog post:

As much as I sympathize with your view, scales matter. And if you make ATMs that deal with all the massive client population, the number of bank tellers needed will go down. A lot.

Based on what I read a while ago a really interesting thing happened in financial industry: while the number of tellers went down, number of front-end bank employees did not go down nearly as dramatically, they just turned into “consultants”.

Mergeable replicated data types – Part II

Mergeable replicated data types – part II Kaki et al., OOPLSA ’19

Last time out we saw how Mergeable Replicated Data Types (MRDTs) use a bijection between the natural domain of a data type and relational sets to define merge semantics between two concurrently modified versions given their lowest common ancestor (LCA). Today we’re picking things up in §4 of the paper, starting with how to derive a merge function for an arbitrary data type.

The basic approach so far has been to take the difference between each version and the LCA, and add those differences to the LCA state. But using an example of a pair data type holding pairs of integers, the authors show that what we’ve been doing so far isn’t quite good enough. We need to merge the pair state, and also the state of the first and second members of the pair.

The pair example demonstrates the need and opportunity to make merges compositional. The specification of such a composite merge function is invariably compositional in terms of the merge specifications of the types involved.

Given a merge function for counters, we can construct a merge function for a pair of counters. Given a Continue reading

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