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所在平台: Udemy |
课程主页: https://www.udemy.com/course/oracle-dba-bootcamp-skills-for-the-real-world/
课程评论：没有评论
课程名称：Oracle DBA Bootcamp: 现实世界技能 课程概述： 本课程专注于Oracle数据库的架构、网络和安全性，这些是管理可靠、可扩展和安全数据库环境的基础要素。Oracle数据库的架构主要由两个组成部分构成：实例和数据库。实例包含内存结构，如系统全局区（SGA）和程序全局区（PGA），以及DBWn、LGWR、SMON和PMON等后台进程，负责内存管理、日志记录和恢复。数据库本身由物理文件组成，包括数据文件、控制文件和重做日志文件，并逻辑上组织为表空间、段、扩展和块。 Oracle的网络通过Oracle网络服务实现，确保客户端应用程序与Oracle数据库之间的无缝通信。关键组件包括管理连接请求的监听器、定义服务名称映射的tnsnames.ora以及处理命名方法和安全设置的sqlnet.ora。Oracle支持多种连接类型，包括专用和共享服务器，并提供诸如Easy Connect等简化连接选项。 在Oracle数据库中，安全性是多层次的，从身份验证（数据库、操作系统或外部方法）到通过角色和权限进行的授权。Oracle支持系统和对象级的权限管理，并具备角色、配置文件和密码策略等高级特性。为确保数据的机密性和完整性，Oracle提供透明数据加密（TDE）来加密静态数据，并通过网络加密确保数据传输的安全性。
Oracle Database Architecture, Networking, and Security are foundational aspects of managing a reliable, scalable, and secure database environment. The architecture of Oracle Database consists of two main components: the instance and the database. The instance includes memory structures like the System Global Area (SGA) and Program Global Area (PGA), along with background processes such as DBWn, LGWR, SMON, and PMON, which handle memory management, logging, and recovery. The database itself consists of physical files, including datafiles, control files, and redo log files, and is logically organized into tablespaces, segments, extents, and blocks.Oracle networking is facilitated through Oracle Net Services, which enables seamless communication between client applications and the Oracle Database. Key components include the listener, which manages connection requests; tnsnames.ora, which defines service name mappings; and sqlnet.ora, which handles naming methods and security settings. Oracle supports multiple connection types, including dedicated and shared servers, and offers simplified connection options like Easy Connect.Security in Oracle Database is multi-layered, beginning with authentication (database, OS, or external methods) and authorization through roles and privileges. Oracle allows for both system and object-level privilege management, and supports advanced features like roles, profiles, and password policies. To ensure data confidentiality and integrity, Oracle provides Transparent Data Encryption (TDE) for encrypting data at rest and network encryption for secure data transmission.
