faermanj

# Por quê praticar programação neste formato?
# Como se preparar para entrevistas de programação?
# O que se avalia normalmente?
# Como lidar com a pressão?
# Como gerenciar o tempo?
# Como gerenciar a comunicação?
# Que tipos de problema se pede mais?
# Que algoritmos e estruturas de dados preciso saber?
# Que linguagens e ferramentas posso usar?
# Quais são as perguntas mais comuns?

faermanj

#!/usr/bin/env bash
set -e

# Script for creating a multi-region active-active deployment
# usgin the AWS CLI based on the post from @adhorn:
# https://medium.com/@adhorn/multi-region-serverless-backend-reloaded-1b887bc615c0

RID="$RANDOM"
PREFIX="globalapp"
REGIONS="us-east-1 us-west-2 eu-west-1"

faermanj

# curl -s https://gist.githubusercontent.com/faermanj/2db9d8d5c24cc692fc415b30e8c039c6/raw/167d055e8db9cd5ae27f19b7ca71838c381f0ac7/initc9.sh | sh

# Javascript
curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash

export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

nvm install node

faermanj

Serverless for Developers - 4YFN 2019

Julio Faerman - @faermanj

Before the begining

• Why AWS? open https://aws.amazon.com/what-is-cloud-computing/

• Free? open http://aws.amazon.com/free/

faermanj

REL 3 How does your system adapt to changes in demand?

The USE Method

"How does your system adapt"

• percentiles (50%, 95%, 99%, 99.9%, ..., 100%)
• errors (4xx,5xx)
• mean and stdev

"changes in demand"

faermanj

Welcome to AWS Well Architected Solutions on Twitch!

Today we are building the best practice "REL 3 How does your system adapt to changes in demand?" The goal is to create a sample application using AWS Elastic Beanstalk and AWS CloudFormation and start taking load measurements.

You are welcome to comment and ask questions on twitch chat, but please keep it friendly and respectful.

More details and links on this gist: https://gist.github.com/jfaerman/9dd8c585852a21d605048631b6788125

faermanj

REL 1: How are you managing AWS service limits for your accounts?

AWS Service Limits

Active monitoring and managing limits

AWS Service Limits API

AWS Trusted Advisor Adds Service Limit Dashboard and CloudWatch Metrics

faermanj

# https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/raid-config.html

mdadm --create --verbose /dev/md0 \
  --level=0 \
  --name=riverraid \
  --raid-devices=2 /dev/nvme1n1 /dev/nvme2n1
mkfs.ext4 -L riverraid /dev/md0
mdadm --detail --scan | sudo tee -a /etc/mdadm.conf
dracut -H -f /boot/initramfs-$(uname -r).img $(uname -r)
mkdir -p /mnt/riverraid

faermanj

Video: https://www.twitch.tv/videos/177667117

PERF 1. How do you select the best performing architecture?

"In God we trust, all others bring data" W. Edwards Deming

Performance 👎

• Latency
• Throughput
• Latency ⍺ Concurrent Users

faermanj

'use strict';
const data = require('./data');

const response = (statusCode, url) => {
    return {
        statusCode: statusCode,
        headers: {
            'Access-Control-Allow-Origin': '*',
            'Access-Control-Allow-Credentials': true,
            'Location': `${url}`