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                2021-12-14 周二 ## 分布式系統CAP理論 ![](https://img.kancloud.cn/cf/18/cf1812490a1199c2ea262669878b3592_671x578.png) * `Consistency 一致性`:所有數據備份,在同一時刻是否同樣的值。(等同于所有節點訪問同一份最新的數據副本) * `Availability 可用性`:在集群中一部分節點故障后,集群整體是否還能響應客戶端的讀寫請求。(對數據更新具備高可用性) * `Partition Tolerance 容錯性`:以實際效果而言,分區相當于對通信的時限要求。系統如果不能在時限內達成數據一致性,就意味著發生了分區的情況,必須就當前操作在C和A之間做出選擇。 ## Spring Cloud的4大注冊中心 | 組件名稱 | 實現語言 | CAP | 健康檢查 | | --- | --- | --- | --- | | Eureka | `Java` | AP | 可配 | | Zookeeper | `Java` | CP | 支持 | | Consul | `Golang` | CP | 支持 | | Nacos | `Java` | AP | 支持 | ## 功能支持度比較 ![](https://img.kancloud.cn/b3/4f/b34f6a2e4207170c3967f4faab540650_1358x1232.png) ## 參考文檔 * [注冊中心ZooKeeper、Eureka、Consul 、Nacos對比](https://links.jianshu.com/go?to=https%3A%2F%2Fblog.csdn.net%2Ffly910905%2Farticle%2Fdetails%2F100023415)
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