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🟢 = running ❌ = not established | not running

strategy	RPO	RTO	tiers	availability target	note
backup + restore	3h ≤ RPO	3h ≤ RTO ≤ 2d	DB ❌ app ❌ DNS ❌	99%	cheapest + max. ops
pilot light	5min ≤ RPO ≤ 3h	10min ≤ RTO ≤ 3h	DB 🟢 app ❌ DNS ❌	99.5%	app must be booted + scaled
warm standby	5sec ≤ RPO ≤ 15min	1min ≤ RTO ≤ 15min	DB 🟢 app 🟢 DNS ❌	99.9%	app tier scaled down
hot standby	5sec ≤ RPO ≤ 15min	10s ≤ RTO ≤ 10 min	DB 🟢 app 🟢 DNS ❌	99.95%	app tier ready to take traffic
active/active	~ 0s	~ 0s	DB 🟢 app 🟢 DNS 🟢	99.99%	most expensive + minimal ops

makomweb

In-Scope AWS Services · SAP-C02

• Origin:
  • AWS Website
  • AWS Glossar

Topics

• Analytics
• Application Integration
• Blockchain

makomweb

NGINX on ECS Fargate (AWS)

Architecture Diagram

graph TB
    Internet["🌐 Internet<br/>User/Client"]
    
    subgraph Region["<b>Region: eu-central-1</b>"]
        subgraph VPC_BOX["<b>VPC: 10.0.0.0/16</b><br/>(spans multiple AZs)"]

makomweb

SOLID

Single responsible principle

• a module should be responsible to one, and only one, actor
• a class should have only one reason to change
• solves the problem of God objects, tight coupling and change chains (and more)

Solution: Don't rely on technology but rely on functionality (feature)!

makomweb

# Docker multistage
# 1. stage to run npm install
# 2. stage to create a webserver image with the build artifact from stage 1

FROM node:latest as build-stage

WORKDIR /app

COPY ./ /app/

makomweb

<?php

declare(strict_types=1);

namespace App\Tests\Unit\Playground;

use Attribute;
use PHPUnit\Framework\TestCase;
use ReflectionAttribute;
use ReflectionClass;

makomweb

# Remove Image
docker rmi <imageId/Name>

# Force remove image
docker rmi -f <imageId/Name>

# Remove dangling images
docker image prune

# Remove all images

makomweb

// HiddenMessage.tsx
import * as React from "react";

function HiddenMessage({children}) {
    const [showMessage, setShowMessage] = React.useState(false)
    return (
        <div>
            <label htmlFor="toggle">Show Message</label>
 

makomweb

import { useEffect, useState } from 'react';
import axios from 'axios';

type State<T> = {
  pending: boolean;
  error?: Error;
  data?: T;
};

export function useGet<T>(url: string) {

makomweb

<?php

declare(strict_types=1);

namespace App\Command;

use Rx\Observable;
use Rx\Scheduler;
use Rx\Scheduler\ImmediateScheduler;
use Symfony\Component\Console\Attribute\AsCommand;