This Week I Learned - Week #46 2020

 This Week I Learned - 

* AWS’s initial offering EC2-classic platform allowed customers to run ec2 instances on a flat global network shared by all the customers...In 2013, Azure turned its focus from being just a PaaS provider into a Full-fledged IaaS provider

* A AWS VPC subnet must only belong to one AZ and cannot span AZs. A subnet is public if it has an internet gateway (IGW) attached. AWS allows only one IGW per VPC and the public subnet allow resources deployed in them access to the internet. 

* Azure VNet does not provide a default VNet and does not have private or public subnet as in AWS VPC. Resources connected to a VNet have access to the Internet, by default.

* In Azure VNet, the smallest subnet supported is /29 and the largest is a /8. For the subnet, AWS recommends a minimum address block of /28 and maximum of /16.

* Azure VNet provides Network Security Groups (NSGs) and it combines the functions of the AWS SGs and NACLs. NSGs are stateful and can be applied at the subnet or NIC level. Only one NSG can be applied to a NIC, but in AWS you can apply more than one Security Group (SG) to an Elastic Network Interface (ENI).

* Azure offers two similar but distinct services to allow virtual network (VNet) resources to privately connect to other Azure services.  Azure VNet Service Endpoints and Azure Private Endpoints (powered by Azure Private Link) both promote network security by allowing VNet traffic to communicate with service resources without going over the internet

* AWS PrivateLink provides private connectivity between VPCs and services hosted on AWS or on-premises, securely on the Amazon network. By providing a private endpoint to access your services, AWS PrivateLink ensures your traffic is not exposed to the public internet. 

* Apache Kafka is an open-source, high performance, fault-tolerant, and scalable platform for building real-time streaming data pipelines and applications. Organizations use Apache Kafka as a data source for applications that continuously analyze and react to streaming data. Amazon Managed Streaming for Apache Kafka (MSK) is a fully managed service that makes it easy for you to build and run applications that use Apache Kafka to process streaming data. There are no data transfer charges for in-cluster traffic, and no commitments or upfront payments required. 

* The new names of Docker Enterprise - Universal Control Plane & Docker Engine - Enterprise are Mirantis Kubernetes Engine and Mirantis Container Runtime respectively.

* VMware Tanzu Kubernetes Grid aids in the following:

• Deploy a multi-cluster Kubernetes environment in any region
• Provide Kubernetes as a service on vSphere
• Run Kubernetes at the edge
• Manage Kubernetes across teams and clouds

* Scott Hanselman moved his blog from a 13(?) year old .NET Framework app called DasBlog running on ASP.NET and a Windows Server on real metal hardware to a fresh and new .NET Core app app forked and improved by Mark Downie and running under Linux on Azure. The footer says "Powered by .NET Core 3.1.8 and deployed from commit affbcb via build 20201106.3"

* When your doctor isn't sure why you're sick, she might describe your illness as idiopathic, doctor-speak for "of unknown causes."

* Noise level across appliances -

* Retired army officer-turned-businessman, Captain GR Gopinath launched Air Deccan, India's first budget airline in 2003. By 2007, the airline was operating 380 flights a day from 67 airports, many in small towns. The fleet had grown to 45 planes.  Three million Indians flew at one rupee a ticket. But Air Deccan struggled to cope with the costs as losses mounted. In 2007 Capt Gopinath sold his company to Kingfisher, owned by alcohol baron Vijay Mallya, who also owned Kingfisher Airlines. Mr Mallya rebranded Air Deccan as Kingfisher Red. In September 2011, Mr Mallya shut down a bleeding Kingfisher Red and eventually his whole business, which went bankrupt.  In 2018, some 140 million Indians flew domestically, mostly on budget carriers. Captain GR Gopinath's autobiography is called Simply Fly. He joined the army and served in the 1971 Bangladesh Liberation War. He retired at 28.

* The term “border dispute” tends to evoke images of a limited standoff, but the India-China row is over territory larger than the state of Pennsylvania. It consists of three distinct sectors. Disputes in the middle sector are relatively small and include grazing grounds and passes that link India with Tibet. The eastern sector includes China’s claim to almost the entire Indian state of Arunachal Pradesh, home to more people than Montana, which China calls “South Tibet”. The western sector is in the Indian union territory of Ladakh, which was, until last year, part of the state of Jammu and Kashmir - ORF

* "In our famously broken US healthcare model, an insurance company is wedged in between you and your doctors, and it has different objectives than you do. Direct Primary Care ..is a fairly new trend in the US, but it is also a return to a very old tradition: a direct relationship between you and your doctor, with no insurance company in the way" - Mr. Money Mustache

* Often life is influenced by and steered by chance events – Somerset Maugham

* A true entrepreneur is one who creates wealth where it did not exist earlier by creating a new market and a new customer. They create something new, something different, they change and transmute values; and, on a size and scale that will impact society – Peter Drucker