| <!doctype html><html lang=zh-cn class=no-js><head class=live-site><meta name=ROBOTS content="INDEX, FOLLOW"><link rel=canonical href=https://cn.dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/governance/limit/adaptive-service/><script>var _hmt=_hmt||[];(function(){var e,t=document.createElement("script");t.src="https://hm.baidu.com/hm.js?3b78f49ba47181e4d998a66b689446e9",e=document.getElementsByTagName("script")[0],e.parentNode.insertBefore(t,e)})()</script><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><meta http-equiv=Content-Security-Policy content="frame-src *"><meta name=generator content="Hugo 0.122.0"><link rel="shortcut icon" type=image/png href=/imgs/favicon.png><link rel=apple-touch-icon href=/favicons/apple-touch-icon-180x180.png sizes=180x180><link rel=manifest href=/manifest.webmanifest><title>dubbogo 3.0 柔性服务 | Apache Dubbo</title><meta property="og:title" content="dubbogo 3.0 柔性服务"> |
| <meta property="og:description" content="dubbogo 3.0 柔性服务"><meta property="og:type" content="article"><meta property="og:url" content="https://cn.dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/governance/limit/adaptive-service/"><meta property="article:section" content="overview"><meta property="article:modified_time" content="2023-03-01T15:24:06+08:00"><meta itemprop=name content="dubbogo 3.0 柔性服务"><meta itemprop=description content="dubbogo 3.0 柔性服务"><meta itemprop=dateModified content="2023-03-01T15:24:06+08:00"><meta itemprop=wordCount content="29"><meta itemprop=keywords content><meta name=twitter:card content="summary"><meta name=twitter:title content="dubbogo 3.0 柔性服务"><meta name=twitter:description content="dubbogo 3.0 柔性服务"><script async src="https://www.googletagmanager.com/gtag/js?id=G-NM6FFMT51J"></script><script>var doNotTrack=!1;if(!doNotTrack){window.dataLayer=window.dataLayer||[];function gtag(){dataLayer.push(arguments)}gtag("js",new Date),gtag("config","G-NM6FFMT51J",{anonymize_ip:!1})}</script><link rel=preload href=/scss/main.min.f77e221bcdbe0cadb996060fe82063c747b60c229a1f8bbf0ee529adbadd84fa.css as=style><link href=/scss/main.min.f77e221bcdbe0cadb996060fe82063c747b60c229a1f8bbf0ee529adbadd84fa.css rel=stylesheet integrity><script src=/js/jquery-3.5.1.min.js integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin=anonymous></script><meta name=theme-color content="#326ce5"><link rel=stylesheet href=/css/feature-states.css><meta name=description content="dubbogo 3.0 柔性服务"><meta property="og:description" content="dubbogo 3.0 柔性服务"><meta name=twitter:description content="dubbogo 3.0 柔性服务"><meta property="og:url" content="https://cn.dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/governance/limit/adaptive-service/"><meta property="og:title" content="dubbogo 3.0 柔性服务"><meta name=twitter:title content="dubbogo 3.0 柔性服务"><meta name=twitter:image:alt content="Apache Dubbo"><meta property="og:type" content="article"><meta name=viewport content="width=device-width"><script async defer src=/js/github-buttons.js></script><link href=/css/community.css rel=stylesheet><link href=/css/contactus.css rel=stylesheet><link href=/css/language.css rel=stylesheet><script src=/js/script.js></script></head><body class=td-page><header><nav class="js-navbar-scroll navbar navbar-expand navbar-dark flex-column flex-md-row td-navbar" data-auto-burger=primary><a class=navbar-brand href=/zh-cn/><span class=navbar-logo></span><span class="text-uppercase font-weight-bold">Apache Dubbo</span></a><div class="td-navbar-nav-scroll ml-md-auto" id=main_navbar><ul class="navbar-nav mt-2 mt-lg-0"><li class="nav-item mr-4 mb-2 mb-lg-0"><a class=nav-link href=/zh-cn/overview/home/><span>文档</span></a></li><li class="nav-item mr-4 mb-2 mb-lg-0"><a class=nav-link href=/zh-cn/blog/><span>博客</span></a></li><li class="nav-item mr-4 mb-2 mb-lg-0"><a class=nav-link href=/zh-cn/download/><span>版本发布</span></a></li><li class="nav-item mr-4 mb-2 mb-lg-0"><a class=nav-link href=/zh-cn/contact/><span>联系社区</span></a></li><li class="nav-item mr-4 mb-2 mb-lg-0"><a class=nav-link href=https://start.dubbo.apache.org/bootstrap.html target=_blank><span>Initializer</span><i class='fas fa-external-link-alt'></i></a></li><li class="nav-item mr-4 mb-2 mb-lg-0"><a class=nav-link href=/zh-cn/github/><span>Github</span><i class='fa-brands fa-github'></i></a></li><li class="nav-item dropdown d-lg-block"><a class="nav-link dropdown-toggle" href=# id=navbarDropdownMenuLink role=button data-toggle=dropdown aria-haspopup=true aria-expanded=false>中文</a><div class="dropdown-menu dropdown-menu-right" aria-labelledby=navbarDropdownMenuLink><a class=dropdown-item href=/en/>English</a></div></li><li class="nav-item dropdown d-lg-block"><div class="nav-item d-none d-lg-block"></div></li></ul></div></nav></header><div class=td-outer><main role=main class=td-main><h1 id=柔性负载均衡-柔性服务>柔性负载均衡 (柔性服务)</h1><p>柔性服务是一种去中心化的智能负载均衡组件，同时也是 Dubbo-go 3.0 版本中重磅新特性之一。柔性服务尚处于早期实验阶段，该特性将在后续版本中持续优化，与 Dubbo 社区共同探索出一套适合微服务场景的最佳实践。</p><p>传统的负载均衡算法是由随机节点、RoundRobin 等算法实现，他们的局限性在于不知道当前服务提供者的负载情况，算法总是以尽可能公平的概率调用不同的服务提供者。在实践中，公平不等于高性能，集群服务性能还与服务负载、任务复杂度等多因素相关。为解决传统负载均衡算法的不足，Dubbo-go 在 3.0 版本中引入了柔性服务，实现了容量动态评估和分流功能。</p><p>容量评估是柔性服务的核心，它能动态评估服务端容量水平。在容量评估的过程中，两个核心指标是 TPS 和响应时间，要平衡系统利用率和系统性能两者之间的关系，使整体处于最佳的状态。</p><ul><li>TPS 从服务提供者的角度反映系统利用率。在系统压力未饱和前，请求数越大则系统利用率越高，但是进一步加大请求量直至系统过饱和后，出现过载的问题，导致整体效率呈下降趋势。</li><li>响应时间是从服务调用者的角度反映系统性能。在系统压力未饱和前，响应时间与请求数成线性增长的关系，但是进一步加大请求量直至系统过饱和后，响应时间与请求数成指数级增长。</li></ul><p><img src=/imgs/docs3-v2/golang-sdk/samples/adaptive-service/adaptive.png alt=img></p><p>柔性服务则在调用过程中收集</p><p>在 Dubbo-go 3.0 版本中，支持服务柔性负载均衡。在微服务场景下，客户端会在调用过程中收集该服务下游 server 实例的硬件资源消耗情况，通过容量评估与筛选策略，选择最合适的下游实例进行调用，从而提升系统整体的性能。</p><p>服务柔性将在之后的迭代中持续优化，追求与 Dubbo 社区共同探索出最佳实践。</p></main></div><footer class="bg-dark py-5 row d-print-none footer-margin-0"><div class="container-fluid mx-sm-5"><div class=row><div class="col-6 col-sm-4 text-xs-center order-sm-2"><ul class="list-inline mb-0"><li class="list-inline-item mx-2 h3" data-toggle=tooltip data-placement=top title="Dubbo mailing list archive" aria-label="Dubbo mailing list archive"><a class=text-white target=_blank rel="noopener noreferrer" href=https://lists.apache.org/list.html?dev@dubbo.apache.org><i class="fa fa-envelope"></i></a></li></ul></div><div class="col-6 col-sm-4 text-right text-xs-center order-sm-3"><ul class="list-inline mb-0"><li class="list-inline-item mx-2 h3" data-toggle=tooltip data-placement=top title=GitHub aria-label=GitHub><a class=text-white target=_blank rel="noopener noreferrer" href=https://github.com/apache/dubbo><i class="fab fa-github"></i></a></li><li class="list-inline-item mx-2 h3" data-toggle=tooltip data-placement=top title="Subscribe to mailing list" aria-label="Subscribe to mailing list"><a class=text-white target=_blank rel="noopener noreferrer" href=mailto:dev-subscribe@dubbo.apache.org><i class="fa fa-envelope"></i></a></li></ul></div><div class="col-12 col-sm-4 text-center py-2 order-sm-2"><small class=text-white>© 2024 The Apache Software Foundation. Apache and the Apache feather logo are trademarks of The Apache Software Foundation. 保留所有权利</small></div></div></div></footer><div class="row pt-2 pb-2 footer-margin-0"><div class="container-fluid mx-sm-5"><div class=text-center id=my-footer><img alt=apache_logo src=/imgs/apache_logo.png><ul><li><a href=https://www.apache.org>Foundation</a></li><li><a href=https://www.apache.org/licenses/>License</a></li><li><a href=https://dubbo.apache.org/en/overview/notices/>Security</a></li><li><a href=https://www.apache.org/events/current-event>Events</a></li><li><a href=https://www.apache.org/foundation/sponsorship.html>Sponsorship</a></li><li><a href=https://privacy.apache.org/policies/privacy-policy-public.html>Privacy</a></li><li><a href=https://www.apache.org/foundation/thanks.html>Thanks</a></li></ul></div></div></div><script src=/js/popper.min.js integrity=sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49 crossorigin=anonymous></script><script src=/js/bootstrap.min.js integrity=sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy crossorigin=anonymous></script><script src=/js/main.min.b075178d232d3b0039b3cb6af2fc2e9d90071820167a60f4eea3a79169975ee8.js integrity="sha256-sHUXjSMtOwA5s8tq8vwunZAHGCAWemD07qOnkWmXXug=" crossorigin=anonymous></script><script async src=https://widget.kapa.ai/kapa-widget.bundle.js data-website-id=d763c4f2-f871-400b-aeca-d986c4af73c2 data-project-name="Apache Dubbo" data-project-color=#E8442E data-button-text="Ask AI" data-search-mode-enabled=true data-modal-open-on-command-k=true data-modal-disclaimer="The AI supports multiple languages, but it may not be accessible in China due to recaptcha, a proxy is required." data-project-logo=https://pbs.twimg.com/profile_images/1011849068283191302/FJbH5vbF_400x400.jpg data-modal-example-questions="What is Apache Dubbo?,How to run Apache Dubbo?" data-button-position-top data-button-position-right=20px data-button-position-bottom=200px data-button-position-left></script><script>(function(e,t,n,s){e[s]=e[s]||[];var a=t.getElementsByTagName(n)[0],i=t.createElement(n);i.async=!0,i.id="beacon-aplus",i.setAttribute("exparams","userid=&aplus&sidx=aplusSidex&ckx=aplusCkx"),i.src="//g.alicdn.com/alilog/mlog/aplus_v2.js",i.crossorigin="anonymous",a.parentNode.insertBefore(i,a)})(window,document,"script","aplus_queue"),function(e){var t=e.createElement("script");t.type="text/javascript",t.async=!0,t.src="//g.alicdn.com/aes/??tracker/3.3.4/index.js,tracker-plugin-pv/3.0.5/index.js,tracker-plugin-event/3.0.0/index.js,tracker-plugin-autolog/3.0.3/index.js,tracker-plugin-survey/3.0.3/index.js,tracker-plugin-jserror/3.0.3/index.js,tracker-plugin-resourceError/3.0.3/index.js",t.onload=function(){window.AES_CONFIG=window.AES_CONFIG||{env:"prod"},window.aes=new AES({pid:"zN245h",user_type:6}),window.AESPluginAutologConfig={exposure:"auto"},window.AEMPluginInstances=[aes.use(AESPluginPV,window.AESPluginPVConfig||{enableHistory:!0}),aes.use(AESPluginEvent,window.AESPluginEventConfig||{}),aes.use(AESPluginSurvey,window.AESPluginEventConfig||{}),aes.use(AESPluginAutolog,window.AESPluginAutologConfig||{}),aes.use(AESPluginJSError,window.AESPluginJSError||{}),aes.use(AESPluginResourceError,window.AESPluginResourceError||{})]},setTimeout(function(){e.getElementsByTagName("body")[0].appendChild(t)},800)}(document)</script></body></html> |
