云数据库 Memcached

{"list":[{"id":7488,"title":"产品简介","type":"directory","docType":"default","pdfUrl":"https://main.qcloudimg.com/raw/document/product/pdf/241_7488_cn.pdf","children":[{"id":7489,"title":"产品概述","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/7489"},{"id":7490,"title":"产品优势","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/7490"},{"id":7491,"title":"应用场景","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/7491"},{"id":7496,"title":"自动容灾","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/7496"},{"id":7498,"title":"在线升级扩容","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/7498"},{"id":3925,"title":"地域和可用区","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/3925"}],"link":"/document/product/241/7488"},{"id":1546,"title":"购买指南","type":"directory","docType":"price","pdfUrl":"https://main.qcloudimg.com/raw/document/product/pdf/241_1546_cn.pdf","children":[{"id":1548,"title":"产品价格","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1548"},{"id":7492,"title":"创建实例","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/7492"}],"link":"/document/product/241/1546"},{"id":1549,"title":"快速入门","type":"directory","docType":"default","pdfUrl":"https://main.qcloudimg.com/raw/document/product/pdf/241_1549_cn.pdf","children":[{"id":1580,"title":"操作说明及示例","type":"directory","docType":"default","pdfUrl":"","children":[{"id":1582,"title":"Java 教程及示例代码","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1582"},{"id":1583,"title":"PHP 教程及示例代码","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1583"},{"id":1584,"title":"Python 教程及示例代码","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1584"},{"id":1585,"title":"C++ 教程及示例代码","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1585"},{"id":1586,"title":"C Sharp .NET教程及示例代码","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1586"},{"id":1588,"title":"实现缓存 PHP session 全局变量","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1588"}],"link":"/document/product/241/1580"},{"id":1572,"title":"使用限制类","type":"directory","docType":"default","pdfUrl":"","children":[{"id":1573,"title":"限制说明","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1573"},{"id":1575,"title":"兼容的协议说明","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1575"},{"id":1576,"title":"标准协议缺陷解决方案说明","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1576"}],"link":"/document/product/241/1572"},{"id":1552,"title":"访问说明","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1552"},{"id":1556,"title":"云数据库 Memcached 管理","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1556"},{"id":1554,"title":"数据导出导入","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1554"}],"link":"/document/product/241/1549"},{"id":38707,"title":"操作指南","type":"directory","docType":"default","pdfUrl":"https://main.qcloudimg.com/raw/document/product/pdf/241_38707_cn.pdf","children":[{"id":38708,"title":"访问管理","type":"directory","docType":"default","pdfUrl":"","children":[{"id":38709,"title":"访问管理概述","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/38709"},{"id":38710,"title":"授权策略语法","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/38710"},{"id":38711,"title":"可授权的资源类型","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/38711"}],"link":"/document/product/241/38708"},{"id":7501,"title":"查看监控","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/7501"}],"link":"/document/product/241/38707"},{"id":7228,"title":"API 文档","type":"directory","docType":"api","pdfUrl":"https://main.qcloudimg.com/raw/document/product/pdf/241_7228_cn.pdf","children":[{"id":42211,"title":"更新历史","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42211"},{"id":42199,"title":"简介","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42199"},{"id":42210,"title":"API 概览","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42210"},{"id":42200,"title":"调用方式","type":"directory","docType":"default","pdfUrl":"","children":[{"id":42201,"title":"请求结构","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42201"},{"id":42202,"title":"公共参数","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42202"},{"id":42203,"title":"签名方法 v3","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42203"},{"id":42204,"title":"签名方法","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42204"},{"id":42205,"title":"返回结果","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42205"},{"id":78526,"title":"参数类型","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/78526"}],"link":"/document/product/241/42200"},{"id":42206,"title":"实例相关接口","type":"directory","docType":"default","pdfUrl":"","children":[{"id":42207,"title":"获取Cmem实例列表","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42207"}],"link":"/document/product/241/42206"},{"id":42208,"title":"数据结构","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42208"},{"id":42209,"title":"错误码","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/42209"},{"id":42212,"title":"云数据库 Memcached API 2017","type":"directory","docType":"default","pdfUrl":"","children":[{"id":1762,"title":"简介","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1762"},{"id":1763,"title":"API概览","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1763"},{"id":1006,"title":"调用方式","type":"directory","docType":"default","pdfUrl":"","children":[{"id":4565,"title":"请求结构","type":"directory","docType":"default","pdfUrl":"","children":[{"id":4569,"title":"最终请求形式","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4569"},{"id":4568,"title":"接口请求参数","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4568"},{"id":4567,"title":"公共请求参数","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4567"},{"id":4566,"title":"请求结构简介","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4566"}],"link":"/document/product/241/4565"},{"id":4570,"title":"返回结果","type":"directory","docType":"default","pdfUrl":"","children":[{"id":4576,"title":"异步任务接口返回格式","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4576"},{"id":4571,"title":"正确返回结果","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4571"},{"id":4572,"title":"错误返回结果","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4572"},{"id":4573,"title":"错误码","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4573"}],"link":"/document/product/241/4570"},{"id":4574,"title":"签名方法","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4574"}],"link":"/document/product/241/1006"},{"id":4860,"title":"使用示例","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/4860"},{"id":1007,"title":"实例相关接口","type":"directory","docType":"default","pdfUrl":"https://mccdn.qcloud.com/static/qc_doc/013cebf54ea727b61610edfb8829aba5/1007.v20160720180833.pdf","children":[{"id":1389,"title":"清空实例","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1389"},{"id":1388,"title":"查询实例列表","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/1388"}],"link":"/document/product/241/1007"}],"link":"/document/product/241/42212"}],"link":"/document/product/241/7228"},{"id":3241,"title":"常见问题","type":"directory","docType":"faq","pdfUrl":"https://main.qcloudimg.com/raw/document/product/pdf/241_3241_cn.pdf","children":[{"id":3243,"title":"使用常见问题","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/3243"},{"id":3247,"title":"Memcached 连接诊断","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/3247"}],"link":"/document/product/241/3241"},{"id":39122,"title":"相关协议","type":"directory","docType":"default","pdfUrl":"https://main.qcloudimg.com/raw/document/product/pdf/241_39122_cn.pdf","children":[{"id":89688,"title":"服务等级协议","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/89688"},{"id":89616,"title":"服务条款","type":"page","docType":"default","pdfUrl":"","link":"/document/product/241/89616"}],"link":"/document/product/241/39122"},{"id":33023,"title":"联系我们","type":"page","docType":"default","pdfUrl":"https://main.qcloudimg.com/raw/document/product/pdf/241_33023_cn.pdf","link":"/document/product/241/33023"},{"id":38466,"title":"词汇表","type":"page","docType":"glossary","pdfUrl":"https://main.qcloudimg.com/raw/document/product/pdf/241_38466_cn.pdf","link":"/document/product/241/38466"}],"categoryId":241,"title":"云数据库 Memcached","lang":"zh"}

文档中心云数据库 Memcached 产品简介自动容灾

自动容灾

最近更新时间：2022-11-09 11:39:52

我的收藏

1. 腾讯云数据库 Memcached 单个实例的数据保存在多组机器上面，每一组采用双机热备架构，当其中一个节点发生故障时，会用新节点替换掉对应的故障节点。
2. 当主机节点故障时，接入机会把读写请求发送到原来的从机节点，同时会新增一个从机节点开始从新的主机拷贝数据，最终完成主从的数据同步。
3. 当从机节点故障时，直接加入新的从机节点。
4. 任意节点的替换都可以由系统自动处理，亦可人工切换。n
﻿
﻿

上一篇: 应用场景下一篇: 在线升级扩容