This Week I Learned - Week #32 2021
This Week I Learned -
* Superfish is an enhanced Suckerfish-style menu jQuery plugin that takes an existing pure CSS drop-down menu (so it degrades gracefully without JavaScript) and adds enhancements.
* The Enterprise-Scale architecture provides prescriptive guidance coupled with Azure best practices, and it follows design principles across the critical design areas for organizations to define their Azure architecture
* A single heterogeneous Kubernetes cluster can have both Windows and Linux worker nodes. You can only run Windows containers on Windows nodes and Linux containers on Linux nodes. And there's a further constraint: the Kubernetes control plane can only run on a Linux node. Red Hat OpenShift supports both Windows and Linux containers.
* Uptime SLA is an optional feature to enable a financially backed, higher SLA for a cluster. Uptime SLA guarantees 99.95% availability of the Kubernetes API server endpoint for clusters that use Availability Zones and 99.9% of availability for clusters that don't use Availability Zones.
* How Netflix does failovers in 7 minutes flat - During winter 2012, Netflix suffered an extended outage that lasted for seven hours due to problems in the AWS Elastic Load Balancer service in the US-East region. Netflix runs on Amazon Web Services [AWS]—it doesn't have any data centers of its own. All of your interactions with Netflix are served from AWS, except the actual streaming of the video. Once you click "play," the actual video files are served from Netflix's own CDN. To prevent this from happening again, Netflix decided to build a system of regional failovers that is resilient to failures of our underlying service providers. The trouble isn't necessarily a cloud infrastructure issue. It could be a bad code deploy in one of the hundreds of microservices that make up the Netflix ecosystem, a cut in an undersea cable, etc. Netflix's traffic pattern is not static throughout the day.....Once we have determined the appropriate size for each microservice, we trigger scaling for each of them by setting the desired size of each cluster and then let AWS do its magic.
* Möbius strip is a one-sided surface that can be constructed by affixing the ends of a rectangular strip after first having given one of the ends a one-half twist. It looks like an infinite loop.
* Black Bart was an American outlaw and successful stagecoach robber active in California and Oregon between the 1870s and 1880s, known for leaving behind poetic messages after his robberies.
* The normal walking stride/height ratio is 0.43
* The Indo-Pakistani War of 1971 was a military confrontation between India and Pakistan that occurred during the Bangladesh Liberation War in East Pakistan from 3 December 1971 to the fall of Dacca (Dhaka) on 16 December 1971. On the evening of 3 December 1971, the Pakistan Air Force (PAF) launched surprise pre-emptive strikes on eleven airfields in north-western India, including Agra, which was 480 kilometres (300 mi) from the border. These pre-emptive strikes, known as Operation Chengiz Khan, were inspired by the success of Israeli Operation Focus in the Arab–Israeli Six-Day War during which Israel attacked Arab airbases in 1967. The Indian Prime Minister Indira Gandhi held that the air strikes were a declaration of war against India and the Indian Air Force (IAF) responded with air strikes. This air action marked the official start of the Indo-Pakistani War of 1971. In a two-week war, Pakistan lost half its navy, a quarter of its air force and a third of its army. The Indian Army was successful in penetrating into Pakistani soil. It eventually made some quick and initial gains, including the capture of around 15,010 km2 (5,795 sq mi)of Pakistani territory; this land gained by India in Azad Kashmir, Punjab and Sindh sectors was later ceded in the Simla Agreement of 1972, as a gesture of goodwill. The Bhuj airstrip was destroyed in the Indo-Pakistani War of 1971. Under the leadership of Air Force base commander Squadron Leader Vijay Kumar Karnik, it was rebuilt during wartime by a group of 300 women from the nearby village of Madhapar who were given 72 hours to complete the task.
* The plague outbreak killed eight million Indians between 1886 and 1914. The highly infectious Spanish flu of 1918 killed between 17 and 18 million Indians, more than all the casualties in World War One. India bore a considerable burden of death - it lost 6% of its people. Mahatma Gandhi and his febrile associates at the ashram were lucky to recover. The 1918 flu happened in the pre-antibiotic era, and there was simply not enough medical equipment to provide to the critically ill. Also western medicines weren't widely accepted in India then and most people relied on indigenous medication. The main remedy," wrote The Times of India then, "is to go to bed and not worry". That pandemic is believed to have infected a third of the world's population and claimed between 50 and 100 million lives. - BBC
* The 1918 outbreak has been called the Spanish flu because Spain, which remained neutral during World War I, was the first country to publicly report cases of the disease. China, France and the United States already had cases of the flu, but wartime censorship largely kept the outbreaks out of the newspapers. Spain hated being linked to the deadly 1918 flu pandemic.
* Each chapter of Viswanathan Anand's "Mind Master: Winning Lessons From A Champion's Life" ends with a chess position – and a summary paragraph carrying the central message that the chapter contains. Shanta Gokhale's autobiography One Foot on the Ground: A Life Told Through the Body, the story of her life over eight decades is told through the progress of her body, as it grows, matures and begins to wind down. Janaki Lenin links nature to her spouse in her book My Husband & Other Animals & My Husband & Other Animals 2.
* In India, there are broadly three kinds of geographic hierarchies. There is a political boundary hierarchy, a postal boundary hierarchy and an administrative boundary hierarchy.
* DataMeet is a community of Data Science and Open Data enthusiasts. Data{Meet} community encompass many people, ideas, projects, solutions, and challenges that using data in India presents.
* "Putting lifestyle first is how you find a job, not a calling" - When Breath Becomes Air, Dr. Paul Kalanithi
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