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数据管理DMS的元数据访问控制功能是指在DMS中对数据库、实例的查看与访问权限进行控制的功能。元数据访问控制开启后，如果用户没有数据库或实例的查询、导出或变更权限，则无法查看与访问该资源。本文将介绍如何在DMS中开启实例与数据库级别的访问控制。

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文章 2022-01-09 来自：开发者社区

REDIS10_Redission的入门案例、多主案例搭建、分布式锁进行加锁、解锁底层源码解析（七）

⑥. watch dog自动延期机制(客户端A加锁成功,就会启动一个watch dog看门狗,他是一个后台线程,会每隔10秒检查一下,如果客户端A还持有锁key,那么就会不断的延长锁key的生存时间,默认每次续命又从30秒新开始)⑦. 详解缓存续命源码解析四:加锁逻辑(针对于默认时间30s过期的) lock.lock()没有锁,加锁(唯一的id),启动定时任务,设置30s的过期时间有锁:将唯一i....

文章 2022-01-09 来自：开发者社区

REDIS10_Redission的入门案例、多主案例搭建、分布式锁进行加锁、解锁底层源码解析（六）

⑤. Redisson源码解析①. 测试代码展示public class WatchDogDemo { public static final String LOCKKEY = "DEBUG_YUANMA"; private static Config config; private static Redisson redisson; static { ...

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更新时间 2024-03-07 13:51:41

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