September 2025
Intermediate to advanced
484 pages
14h 54m
Portuguese (Portugal, Brazil)
Content preview from Construindo microsserviços orientados a eventos, 2nd Edition
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Capítulo 16. Consistência eventual
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
Observação
Uma versão anterior deste capítulo apareceu anteriormente em Building an Event-Driven Data Mesh (O'Reilly, 2023).
A consistência eventual costuma ser a principal preocupação dos sistemas distribuídos. No caso de fluxos de eventos, as preocupações com a consistência eventual tendem a se concentrar principalmente no lado do consumidor, pois cada consumidor lê e processa os eventos em seu próprio ritmo.
Felizmente para nós, há algumas pessoas que vêm analisando, trabalhando e pensando na consistência eventual há muito tempo. Pat Helland é uma dessas pessoas e escreveu um excelente artigo que reúne insights e opiniões de vários líderes de pensamento sobre o assunto:
Como Doug [Terry] cunhou a expressão consistência eventual no artigo Bayou em 1995, eu estava interessado em sua perspectiva. Quando ele definiu consistência eventual, quis dizer que, para cada objeto em uma coleção de objetos, todas as réplicas de cada objeto terão o mesmo valor. Então, ele disse: "Sim, eu deveria ter chamado de convergência eventual".
Pat Helland
Essa citação é significativa, pois muitas pessoas confundem consistência com algo diferente de convergência. Para sistemas orientados por eventos, estamos muito interessados em garantir que os serviços sejam convergentes, embora eles nunca sejam realmente consistentes, pois cada um consome e ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.