用户注册接口设计① 编写流程注册用户路由router编写；处理函数的控制器controller编写；操作数据库的service编写；采用分层架构的思维，不同的模块处理不同的内容。注意：需要安装koa对body解析的依赖//目录：@/oruter/index.js // 封装路由 const fs = require ('fs') const useRoutes = function (){ f.....

文章 2020-09-12 来自：开发者社区

PostgreSQL 数据库数据文件BLOCK一致性校验、备份集恢复后的有效性快速校验 - pg_verify_checksums

背景使用PostgreSQL pitr，数据库恢复到一个时间点后，这个数据库的所有BLOCK是否都是一致的？数据库在DOWN机恢复后，数据文件所有BLOCK是否一致？定期抽查数据库的数据文件是否BLOCK级一致？以上需求如何快速的满足呢？ PostgreSQL允许用户开启block checksum功能，使用pg_verify_checksums工具，可以对整个数据库或指...

问答 2020-06-07 来自：开发者社区

如何校验数据库和缓存之间数据的一致性？：报错

1.背景：数据库是MySQL，缓存是Redis，redis主要用来读缓存，现需要检测数据可和缓存之间的一致性，确保从缓存读取的数据是最新的。现阶段检验一致性的方法是迭代比较每条记录是否一致。 2.问题：目前检验的方法不宜扩展，容易受限。如果数据量越来越大、记录数越多，则检查一致性的时间会越来越长，这对运行的服务也是有影响的。 3.改进：设置了两个定时器一个是定时（时间间隔短如...

问答 2020-06-06 来自：开发者社区

Shiro 用户名密码数据库校验怎么做的？：报错

今天刚看了shiro例子 Subject currentUser = SecurityUtils.getSubject(); if (!currentUser.isAuthenticated()) { UsernamePasswordToken t...

文章 2020-02-25 来自：开发者社区

PostgreSQL 数据库数据文件BLOCK一致性校验、备份集恢复后的有效性快速校验 - pg_verify_checksums

标签 PostgreSQL , checksum , pg_verify_checksums , 备份集校验 , 恢复校验背景使用PostgreSQL pitr，数据库恢复到一个时间点后，这个数据库的所有BLOCK是否都是一致的？数据库在DOWN机恢复后，数据文件所有BLOCK是否一致？定期抽查数据库的数...

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