Prashant psahni

The most common architecture problems are:

High availability and resiliency : Make a module to have zero downtime. H.A. often means modules running on different datacenters. The key point generaly is how to handle the latency/timeout
Security : How to patch a module live (i.e. with zero downtime)
Performance : How to reduce the amount of memory needed for a single module to run
Horizontal scalability : How to scale a module to increase its workload
Multi-tenancy : How to manage multiple customers in a single instance with a high level of security (avoid data crossing/leak)
Write once/Deploy everywhere : The CMDB is a first answer, but isn't enough. For example, how can a developer test locally his module without having the full stack ?
KPIs : Provide relevant KPIs for each module to monitor/supervise technical/business issues. Technical KPIs are generally the most straightforward, but business KPI are generally the most value-added ones

NoSql Vs SQL

Relational Db gives you more structural rigidity, while noSql are more flexible.
Normalization works will with Rel db.
NoSql databases are horizontally scalable while SQL databases are vertically scalable.
NoSql documents may not contain same type of information.
NoSql is good for handling big data. It is low cost. Good for mobile app data handling.

NoSql Flexibility

Consider the case where you want to start tracking books’ number of pages: in a SQL database, you would have to change the book model and make sure you add a number of pages to each book instance, but in a NoSQL database, you can just add page numbers to new books as you create their documents (and you could choose to add page numbers for books

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pineal_gland.md

How to decalcify the Pineal Gland

https://medium.com/@humanoriginproject/20-ways-to-heal-pineal-gland-calcification-open-the-third-eye-39c67abc00a2#:~:text=Meditation%20helps%20produce%20deep%20brain,and%20open%20the%20third%20eye.

What is PI

It was well established that the pineal gland releases melatonin to direct circadian rhythms and sleep cycles. However, it’s now known to have a far broader purpose. As a conductor of the endocrine system, the pineal gland controls hormone signals to all organs. It plays a dual neural-endocrine role with functions spanning into all bodily systems. Today, evidence suggests the pineal gland is the master conductor of the physiology of the brain and body.

	// Load HTTP module
	const http = require("http");

	const hostname = "127.0.0.1";
	const port = 8000;

	// Create HTTP server
	const server = http.createServer(function(req, res) {

	// Set the response HTTP header with HTTP status and Content type

	# app/controllers/application_controller.rb
	class ApplicationController < ActionController::API
	rescue_from ActiveRecord::RecordInvalid, with: :render_unprocessable_entity_response
	private

	def render_unprocessable_entity_response(invalid)
	render json: { errors: invalid.record.errors }, status: :unprocessable_entity
	end
	end

	ng g m about --route about --module app.module

	app-routing.module.ts

	import { NgModule } from '@angular/core';
	import { Routes, RouterModule } from '@angular/router';
	const routes: Routes = [
	{ path: 'about', loadChildren: () => import('./about/about.module').then(m => m.AboutModule) },
	{ path: 'users', loadChildren: () => import('./users/users.module').then(m => m.UsersModule) },
	{ path: '', redirectTo: '', pathMatch: 'full'}

	Exercise1
	p 345.to_s(2).split('') #=> "1001"


	```
	function getBinary(number) {
	let binary = [];
	while (number >= 1) {
	binary.push(number%2);
	number = parseInt(number/2);

	https://github.com/reactjs/react-rails#ujs


	https://github.com/reactjs/react-rails#ujs


	yarn add @babel/preset-react