{"id":14618,"date":"2023-07-13T15:36:43","date_gmt":"2023-07-13T22:36:43","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=14618"},"modified":"2025-06-13T20:19:08","modified_gmt":"2025-06-14T03:19:08","slug":"distributed-applications","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/pt\/distributed-applications\/","title":{"rendered":"O que \u00e9 um aplicativo distribu\u00eddo? Defini\u00e7\u00e3o e exemplos"},"content":{"rendered":"<p><span style=\"font-weight: 400\">Um aplicativo distribu\u00eddo \u00e9 um programa executado em um ou mais computadores simultaneamente e que se comunica por meio de uma rede. Nesta postagem do blog, vamos nos aprofundar em como os aplicativos distribu\u00eddos funcionam, como eles diferem dos aplicativos aut\u00f4nomos ou tradicionais, como voc\u00ea pode us\u00e1-los, suas vantagens e desvantagens e algumas das ferramentas e tecnologias que voc\u00ea pode usar para cri\u00e1-los.<\/span><\/p>\n<h2><span style=\"font-weight: 400\">Como funcionam os aplicativos distribu\u00eddos?<\/span><\/h2>\n<p><span style=\"font-weight: 400\">Os aplicativos de computa\u00e7\u00e3o distribu\u00edda interagem para atingir uma meta ou tarefa espec\u00edfica. Voc\u00ea pode armazen\u00e1-los em servidores ou plataformas de infraestrutura em nuvem. Os aplicativos distribu\u00eddos podem ser relativamente simples, envolvendo um \u00fanico computador cliente e servidor, ou mais complexos, envolvendo v\u00e1rios computadores clientes e servidores - isso depende principalmente de como voc\u00ea planeja us\u00e1-los.<\/span><\/p>\n<div id=\"attachment_14619\" style=\"width: 568px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-14619\" class=\"wp-image-14619 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2023\/07\/image2-1.png\" alt=\"distributed applications connected over a network\" width=\"558\" height=\"272\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2023\/07\/image2-1.png 558w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2023\/07\/image2-1-300x146.png 300w\" sizes=\"auto, (max-width: 558px) 100vw, 558px\" \/><p id=\"caption-attachment-14619\" class=\"wp-caption-text\">Aplicativos distribu\u00eddos conectados em uma rede<\/p><\/div>\n<p><span style=\"font-weight: 400\">Tamb\u00e9m \u00e9 importante observar que alguns aplicativos distribu\u00eddos s\u00e3o dois programas de software separados que consistem em aplicativos de front-end (cliente) e back-end (servidor). O front-end da opera\u00e7\u00e3o \u00e9 executado no computador cliente e requer um poder de processamento m\u00ednimo, enquanto o back-end requer muito mais poder de processamento, um sistema mais dedicado e \u00e9 executado em um computador servidor.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Em outros aplicativos distribu\u00eddos, a funcionalidade se separa em partes menores e independentes. Esses aplicativos compreendem <\/span><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/microservices-development-best-practices\/\"><span style=\"font-weight: 400\">microsservi\u00e7os<\/span><\/a><span style=\"font-weight: 400\"> que lidam com diferentes preocupa\u00e7\u00f5es dentro do aplicativo mais amplo. Em um <\/span><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/cloud-native-vs-cloud-agnostic\/\"><span style=\"font-weight: 400\">ambiente nativo da nuvem<\/span><\/a><span style=\"font-weight: 400\">No entanto, os componentes individuais normalmente s\u00e3o executados como cont\u00eaineres em um cluster. Entraremos em mais detalhes sobre como um aplicativo distribu\u00eddo \u00e9 criado mais adiante neste blog.<\/span><\/p>\n<h2><span style=\"font-weight: 400\">Aplicativos aut\u00f4nomos vs. distribu\u00eddos<\/span><\/h2>\n<p><span style=\"font-weight: 400\">Os aplicativos aut\u00f4nomos dependem de um \u00fanico sistema para serem executados. Por isso, todo o processamento, o armazenamento de dados e a recupera\u00e7\u00e3o s\u00e3o feitos em uma \u00fanica m\u00e1quina ou servidor. Se o aplicativo for um modelo cliente-servidor, o software ser\u00e1 executado no cliente ou no servidor que o cliente acessou. Esses aplicativos s\u00e3o muito mais simples de manter e desenvolver e n\u00e3o requerem infraestrutura para comunica\u00e7\u00e3o e coordena\u00e7\u00e3o entre sistemas diferentes. Como os aplicativos n\u00e3o dependem de uma rede para se comunicar, eles n\u00e3o s\u00e3o propensos a falhas de comunica\u00e7\u00e3o devido a falhas na rede. <\/span><\/p>\n<p><span style=\"font-weight: 400\">No entanto, isso tamb\u00e9m significa que esses sistemas t\u00eam recursos limitados e n\u00e3o s\u00e3o escalon\u00e1veis. Um aplicativo executado em um \u00fanico sistema \u00e9 um ponto \u00fanico de falha - se o sistema falhar, o aplicativo n\u00e3o estar\u00e1 mais dispon\u00edvel. Eles tamb\u00e9m podem afetar negativamente a velocidade do desenvolvedor \u00e0 medida que crescem, pois mais desenvolvedores precisam trabalhar em uma base de c\u00f3digo compartilhada que n\u00e3o tem necessariamente limites bem definidos.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Por outro lado, os aplicativos distribu\u00eddos s\u00e3o m\u00e1quinas interconectadas capazes de processar, armazenar e recuperar dados por meio de v\u00e1rios sistemas. Eles podem ser executados simultaneamente no servidor e no cliente. A vantagem de usar aplicativos distribu\u00eddos \u00e9 que eles oferecem confiabilidade: se um sistema que executa um aplicativo ficar inativo, outro poder\u00e1 retomar a tarefa. O sistema geral pode tolerar mais falhas nos aplicativos. Eles tamb\u00e9m podem usar <\/span><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/app-scaling\/\"><span style=\"font-weight: 400\">dimensionamento horizontal<\/span><\/a><span style=\"font-weight: 400\">o que \u00e9 imposs\u00edvel com aplicativos aut\u00f4nomos. No entanto, essas vantagens t\u00eam o custo de maior complexidade e sobrecarga operacional.<\/span><\/p>\n<h2><span style=\"font-weight: 400\">Como posso usar aplicativos distribu\u00eddos?<\/span><\/h2>\n<p><span style=\"font-weight: 400\">Considere os aplicativos que s\u00e3o executados em hospitais, bancos ou outras organiza\u00e7\u00f5es orientadas a servi\u00e7os. Como o mesmo software \u00e9 executado em v\u00e1rios computadores, ele permite que as pessoas trabalhem no mesmo registro a partir do mesmo local ou de locais diferentes, editando aspectos diferentes do registro, como registro de dados, atualiza\u00e7\u00e3o de endere\u00e7os e recupera\u00e7\u00e3o de informa\u00e7\u00f5es de transa\u00e7\u00f5es.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">Os casos de uso comuns para aplicativos distribu\u00eddos incluem:<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Navegadores da Web (Tor)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Sites de com\u00e9rcio eletr\u00f4nico (Amazon, eBay)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Aplicativos de blockchain (Bitcoin, Ethereum)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Plataformas de computa\u00e7\u00e3o em nuvem (AWS, Microsoft Azure)<\/span><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/distributed-databases-overview\/\"><span style=\"font-weight: 400\">Bancos de dados distribu\u00eddos<\/span><\/a><span style=\"font-weight: 400\"> (Couchbase, Apache Cassandra)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Redes de compartilhamento de arquivos ponto a ponto (BitTorrent)<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Qualquer aplicativo que armazene dados de um local e os recupere de outro pode ser considerado um aplicativo distribu\u00eddo. Para entender qual arquitetura \u00e9 apropriada para um caso de uso espec\u00edfico, devemos analisar os diferentes tipos de aplicativos distribu\u00eddos que um desenvolvedor pode criar.<\/span><\/p>\n<h2><span style=\"font-weight: 400\">Exemplos de aplicativos distribu\u00eddos<\/span><\/h2>\n<p><span style=\"font-weight: 400\">Os aplicativos distribu\u00eddos aproveitam o princ\u00edpio dos sistemas distribu\u00eddos. As arquiteturas de aplicativos mais comumente usadas podem ser amplamente organizadas nas seguintes categorias com base em suas arquiteturas de rede subjacentes:<\/span><\/p>\n<p style=\"padding-left: 40px\"><span style=\"font-weight: 400\"><strong>Arquitetura cliente-servidor<\/strong>: Esse \u00e9 o sistema distribu\u00eddo mais b\u00e1sico no qual o servidor e o cliente se comunicam. As comunica\u00e7\u00f5es incluem passagem de mensagens, coleta de dados e c\u00e1lculos.<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Arquitetura de tr\u00eas camadas: Essa \u00e9 uma arquitetura cliente-servidor organizada em tr\u00eas camadas: as camadas de apresenta\u00e7\u00e3o, de aplicativos e de dados. Ela usa camadas separadas para cada fun\u00e7\u00e3o do programa. A camada de apresenta\u00e7\u00e3o exibe a interface voltada para o usu\u00e1rio, a camada de aplicativo \u00e9 respons\u00e1vel por acessar e processar os dados do banco de dados e a camada de dados \u00e9 onde todos os dados e informa\u00e7\u00f5es s\u00e3o hospedados e armazenados.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Arquitetura de N camadas: \u00c9 diferente da arquitetura de tr\u00eas camadas porque cada fun\u00e7\u00e3o \u00e9 executada em uma m\u00e1quina ou cluster separado.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px\"><span style=\"font-weight: 400\"><span style=\"font-weight: 400\"><strong>Arquitetura ponto a ponto<\/strong>: Nesse sistema, cada computador atua como um n\u00f3 de comunica\u00e7\u00e3o. Trabalhar como um n\u00f3 para comunica\u00e7\u00e3o significa que cada computador \u00e9 um servidor e um cliente. Ele n\u00e3o tem um servidor centralizado como na arquitetura anterior. Cada sistema gerencia a si mesmo em uma rede ponto a ponto, o que facilita a configura\u00e7\u00e3o e o manuseio.<\/span><\/span><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-14620\" style=\"background-color: initial\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2023\/07\/image1-1.png\" alt=\"Peer-to-peer architecture\" width=\"439\" height=\"396\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2023\/07\/image1-1.png 439w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2023\/07\/image1-1-300x271.png 300w\" sizes=\"auto, (max-width: 439px) 100vw, 439px\" \/><\/p>\n<p style=\"padding-left: 40px\"><span style=\"font-weight: 400\"><strong>Arquitetura de microsservi\u00e7os<\/strong>: Essa arquitetura estrutura um aplicativo como uma cole\u00e7\u00e3o de servi\u00e7os pequenos, pouco acoplados e implement\u00e1veis de forma independente. Um aplicativo pode ser decomposto em servi\u00e7os altamente coesos, cada um representando um recurso ou uma funcionalidade comercial espec\u00edfica.<\/span><\/p>\n<p style=\"padding-left: 40px\"><span style=\"font-weight: 400\"><strong>Arquitetura orientada a servi\u00e7os<\/strong>: Nessa abordagem, os aplicativos s\u00e3o criados como uma cole\u00e7\u00e3o de servi\u00e7os que se comunicam entre si por meio de protocolos padronizados, promovendo o acoplamento frouxo e a reutiliza\u00e7\u00e3o dos servi\u00e7os.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span style=\"font-weight: 400\">Vantagens dos aplicativos distribu\u00eddos<\/span><\/h2>\n<p><span style=\"font-weight: 400\">As vantagens de usar aplicativos distribu\u00eddos s\u00e3o:<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Eles t\u00eam a capacidade de escalonar horizontalmente. Eles aproveitam os recursos de dimensionamento dos sistemas distribu\u00eddos e podem se expandir adicionando novos servidores e sistemas que aumentam a capacidade e as opera\u00e7\u00f5es de uma rede. O dimensionamento horizontal permite que eles implementem facilmente aplicativos em novos sistemas sem afetar a rede original.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Eles s\u00e3o tolerantes a falhas ou defeitos de software, o que os torna muito resilientes. Como os aplicativos s\u00e3o executados em v\u00e1rios sistemas, eles podem trabalhar de forma independente. A falha de um aplicativo ou a pane de uma m\u00e1quina n\u00e3o afeta os outros aplicativos da rede.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Devido \u00e0 natureza distribu\u00edda do aplicativo, o tempo de resposta \u00e9 muito mais r\u00e1pido, o que lhe confere a vantagem da baixa lat\u00eancia.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A autonomia \u00e9 outra vantagem dos aplicativos distribu\u00eddos. Como o sistema compartilha dados, cada usu\u00e1rio ou site mant\u00e9m o controle sobre os dados e recursos armazenados localmente. Isso tamb\u00e9m reduz o risco de uma falha em todo o sistema ou de manipula\u00e7\u00e3o de dados.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Os aplicativos distribu\u00eddos tamb\u00e9m podem ser econ\u00f4micos a longo prazo, pois v\u00e1rios computadores trabalham juntos compartilhando recursos em uma rede.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><span style=\"font-weight: 400\">Desvantagens dos aplicativos distribu\u00eddos<\/span><\/h2>\n<p><span style=\"font-weight: 400\">As desvantagens dos aplicativos distribu\u00eddos s\u00e3o:<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Um aplicativo distribu\u00eddo aumenta a complexidade do projeto. H\u00e1 uma grande sobrecarga operacional na manuten\u00e7\u00e3o, implementa\u00e7\u00e3o e solu\u00e7\u00e3o de problemas.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">O uso de v\u00e1rios servidores, sistemas e bancos de dados aumenta o risco de viola\u00e7\u00f5es de seguran\u00e7a, problemas de dados e vazamento de informa\u00e7\u00f5es. No entanto, voc\u00ea pode combater isso tomando medidas de seguran\u00e7a e executando programas de prote\u00e7\u00e3o em sistemas e servidores em todos os locais.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Como os aplicativos distribu\u00eddos se conectam em uma \u00fanica rede, qualquer problema ou falha pode levar a uma falha de comunica\u00e7\u00e3o entre os aplicativos.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><span style=\"font-weight: 400\">Ferramentas e tecnologias para a cria\u00e7\u00e3o de aplicativos distribu\u00eddos<\/span><\/h2>\n<p><span style=\"font-weight: 400\">A cria\u00e7\u00e3o de aplicativos distribu\u00eddos exige bastante habilidade e conhecimento de arquiteturas de sistemas distribu\u00eddos, estruturas, arquitetura de middleware e bancos de dados. As ferramentas que voc\u00ea escolhe dependem dos requisitos do aplicativo, <\/span><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/developers\/sdks\/\"><span style=\"font-weight: 400\">linguagens de programa\u00e7\u00e3o<\/span><\/a><span style=\"font-weight: 400\">e a funcionalidade e as caracter\u00edsticas desejadas. A maioria das pessoas recorre a ferramentas como Docker e <\/span><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/products\/cloud\/kubernetes\/\"><span style=\"font-weight: 400\">Kubernetes<\/span><\/a><span style=\"font-weight: 400\"> para implantar e gerenciar aplicativos distribu\u00eddos. Elas oferecem abordagens de conteineriza\u00e7\u00e3o e recursos de orquestra\u00e7\u00e3o para dimensionamento, balanceamento de carga e gerenciamento de implementa\u00e7\u00f5es distribu\u00eddas. Plataformas de nuvem como AWS e Microsoft Azure tamb\u00e9m t\u00eam recursos de IaaS e SaaS, o que possibilita us\u00e1-las para criar aplicativos distribu\u00eddos escalon\u00e1veis,<\/span><\/p>\n<h2><span style=\"font-weight: 400\">Conclus\u00e3o<\/span><\/h2>\n<p><span style=\"font-weight: 400\">Neste blog, abordamos os conceitos b\u00e1sicos de aplicativos distribu\u00eddos, como eles diferem dos aplicativos aut\u00f4nomos tradicionais, como e onde us\u00e1-los e as vantagens e desvantagens da implementa\u00e7\u00e3o desses aplicativos. Se estiver interessado em criar seus pr\u00f3prios aplicativos distribu\u00eddos, confira os seguintes recursos:<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.math.ucla.edu\/~anderson\/JAVAclass\/JavaDistributed\/\"><span style=\"font-weight: 400\">Cria\u00e7\u00e3o de aplicativos distribu\u00eddos em Java<\/span><\/a><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.anyscale.com\/blog\/writing-your-first-distributed-python-application-with-ray\"><span style=\"font-weight: 400\">Escrevendo seu primeiro aplicativo Python distribu\u00eddo com Ray<\/span><\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Se voc\u00ea quiser saber mais sobre como os bancos de dados distribu\u00eddos funcionam ou como o Couchbase permite aplicativos de alto desempenho com cache distribu\u00eddo, leia os recursos a seguir:<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/www.couchbase.com\/blog\/pt\/distributed-databases-overview\/\"><span style=\"font-weight: 400\">Bancos de dados distribu\u00eddos: Uma vis\u00e3o geral<\/span><\/a><\/li>\n<li style=\"font-weight: 400\"><a href=\"https:\/\/info.couchbase.com\/rs\/302-GJY-034\/images\/High_Performance_With_Distributed_Caching_Couchbase.pdf\"><span style=\"font-weight: 400\">Aplicativos de alto desempenho com cache distribu\u00eddo<\/span><\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>A distributed application is a program that runs on one or more computers simultaneously and communicates through a network. In this blog post, we\u2019ll dive into how distributed applications work, how they differ from standalone or traditional applications, how you [&hellip;]<\/p>","protected":false},"author":82066,"featured_media":14622,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1814,1815,1821,9417,9411,2366],"tags":[2311,9271],"ppma_author":[9657],"class_list":["post-14618","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-design","category-best-practices-and-tutorials","category-couchbase-architecture","category-performance","category-multi-dimensional-scaling","category-sync-gateway","tag-distributed-database","tag-multi-dimensional-scaling"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.7.1 (Yoast SEO v25.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What Is a Distributed Application? Computing System Examples<\/title>\n<meta name=\"description\" content=\"Learn what distributed applications are, how to use them, their advantages and disadvantages, and some tools and technologies to build them at Couchbase.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.couchbase.com\/blog\/pt\/distributed-applications\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is a Distributed Application? 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