Today's Day Two Cloud podcast explores the struggle of transitioning from traditional infrastructure ops to the public cloud using DevOps principles and new tools. My guest is Aaron Strong, a cloud architect. We talk about how to skill up quickly, where to start, when and where to ask for help, and more.
Carriage returns go back a long way – as far back as typewriters on which a mechanism or a lever swung the carriage that held a sheet of paper to the right so that suddenly letters were being typed on the left again. They have persevered in text files on Windows, but were never used on Linux systems. This incompatibility sometimes causes problems when you’re trying to process files on Linux that were created on Windows, but it's an issue that is very easily resolved.The carriage return, also referred to as Ctrl+M, character would show up as an octal 15 if you were looking at the file with an od octal dump) command. The characters CRLF are often used to represent the carriage return and linefeed sequence that ends lines on Windows text files. Those who like to gaze at octal dumps will spot the \r \n. Linux text files, by comparison, end with just linefeeds.To read this article in full, please click here
Cloudflare’s mission is to help build a better Internet. One of the tools used in pursuit of this goal is computer science research. We’ve learned that some of the difficult problems to solve are best approached through research and experimentation to understand the solution before engineering it at scale. This research-focused approach to solving the big problems of the Internet is exemplified by the work of the Cryptography Research team, which leverages research to help build a safer, more secure and more performant Internet. Over the years, the team has worked on more than just cryptography, so we’re taking the model we’ve developed and expanding the scope of the team to include more areas of computer science research. Cryptography Research at Cloudflare is now Cloudflare Research. I am excited to share some of the insights we’ve learned over the years in this blog post.
Cloudflare’s research model
Principle
Description
Team structure
Hybrid approach. We have a program that allows research engineers to be embedded into product and operations teams for temporary assignments. This gives people direct exposure to practical problems.
Problem philosophy
Impact-focused. We use our expertise and the expertise of partners in industry and academia to select projects that Continue reading
Earlier in this year we’ve discussed zero touch provisioning using the Data Centre Fabric Enabler Infrastructure. As always in my articles, I’ve used wonderful VM images, which are freely available on the Internet. Nevertheless, when you deal with real boxes, various caveats might arise. Today we’ll review how to bring Mellanox switch SN 2010 to the operational state running Cumulus Linux using the ZTP framework I’ve already created.
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It is always exciting to do something for the first time. I have never written about any particular network device. Mostly because I always separate, as far as it is possible, the relationship between my current employer, which is The Hut Group as of today, and my blog. And this is the justification, why Continue reading
In Never-Ending Story of IP Fragmentation I described how you could use TCP Maximum Segment Size to minimize the impact of IP fragmentation and PMTUD blackholes (more details on TCP MSS clamping)… but one has to wonder how people use TCP MSS in the wild and what values you might see.
As is often the case, Geoff Houston found a way to measure them, and published the answer: TCP MSS Values
This is the story of a great collaboration between academia, industry, and users of the Cypher graph querying language as created by Neo4j. Beyond Neo4j, Cypher is also supported in SAP HANA Graph, RedisGraph, Agnes Graph, and Memgraph. Cypher for Apache Spark, and Cypher over Gremlin projects are also both available in open source. The openCypher project brings together Cypher implementors across different projects and products, and aims to produce a full and open specification of the language. There is also a Graph Query Language (GQL) standards organisation.
Cypher is used in hundreds of production applications across many industry vertical domains, such as financial services, telecommunications, manufacturing and retails, logistics, government, and healthcare.
Personally I would have expected that number to be in the thousands by now and there are some suggestions that it is, however Neo4j are still only claiming ‘hundreds of customers’ on their own website.
The read-only core of the Cypher language has already been fully formalised. But when it came time to extend that formalism to include the update mechanisms, the authors ran into difficulties.
Our understanding of updates in the popular graph Continue reading
Now that the technology has been with us for some time, interest in and adoption of software-defined wide-area networks (SD-WAN) is heating up. It’s a good time to look at what’s driving organizations to implement SD-WAN and what type of organizations the technology is best suited for. The technology has clearly taken off. A 2018 survey of 225 IT professionals by SevOne found 66% of respondents already had at least some percentage of their WAN software-defined, and nearly 50% had active SD-WAN projects. Perhaps most impressive, 17% of respondents said they’d connect 100 or more remote sites within 12 to 18 months.To read this article in full, please click here
After a longer break, I managed to get back to my small visualization experiment from last time, and improve it a little. Firstly, the NETCONF interface was switched for a more standard SNMP one, even if that is not as cutting edge anymore.
So without keeping you waiting, here is firs the visualization example, as you can see I was playing here a little and got inspired by the Mischief-makers map from Harry Potter. Of course if you do not like the visuals just re-do the CSS to get rid of it.
Also, this time I made the code public using the much more common github.com here.
Usage/Tutorial
Once you download this project from github, you will find several files in the directory, your starting point are the two configuration files called:
config.ini – holds SNMP configuration like community string and a list of IPs for each network device to be SNMP queried
pyconfig.py – holds low level configuration on how to visualize the data recieved and how to order the devices detected into layers
Lets start with the config.ini, which is much smaller. Here is an example.
VMworld US 2019 has come to a close. If you didn’t attend, don’t worry as we still have VMworld Europe right around the corner. Join us November 4-7, 2019 to hear experts discuss cloud, networking and security, digital workspace, digital trends and more! Register for VMworld Europe now.
Below is a quick recap and resources to check out from VMworld US 2019.
Stats from VMworld US 2019
For networking and security we delivered 91 Breakout Sessions + 2 Showcase Keynotes
Congratulations to our NSX Intelligence team: Anirban Sengupta, Umesh Mahajan, Farzad Ghannadian, Kausum Kumar, Catherine Fan and Ray Budavari.
Surprise guest Michael Dell stopped by the Solutions Exchange to check out demos of what’s new from the networking and security business unit demoed by Chris McCain.
Technical Networking and Security Sessions from VMworld US 2019
Below is a list of sessions that jump into the NSX Continue reading
When Microsoft launched Azure as a cloud-based version of its Windows Server operating system, it didn't make it exclusively Windows. It also included Linux support, and in just a few years, the number of Linux instances now outnumbers Windows instances.It's nice to see Microsoft finally shed that not-invented-here attitude that was so toxic for so long, but the company's latest move is really surprising.Microsoft has partnered with a company called Skytap to offer IBM Power9 instances on its Azure cloud service to run Power-based systems inside of the Azure cloud, which will be offered as Azure virtual machines (VM) along with the Xeon and Epyc server instances that it already offers.To read this article in full, please click here
When Microsoft launched Azure as a cloud-based version of its Windows Server operating system, it didn't make it exclusively Windows. It also included Linux support, and in just a few years, the number of Linux instances now outnumbers Windows instances.It's nice to see Microsoft finally shed that not-invented-here attitude that was so toxic for so long, but the company's latest move is really surprising.Microsoft has partnered with a company called Skytap to offer IBM Power9 instances on its Azure cloud service to run Power-based systems inside of the Azure cloud, which will be offered as Azure virtual machines (VM) along with the Xeon and Epyc server instances that it already offers.To read this article in full, please click here
