Mục tiêu Sau khi hoàn thành bài học này, bạn sẽ có thể làm sau đây: • Mô tả các phương thức bảo vệ dữ liệu • Thay đổi các chế độ bảo vệ dữ liệu cấu hình của bạn • Sửa đổi các dịch vụ vận tải làm lại để phục vụ nhu cầu của bạn | Configuring Data Protection Modes and Redo Transport Services Oracle Database 10g: Data Guard Administration 6 - Objectives After completing this lesson, you should be able to do the following: Describe the data protection modes Change the data protection mode of your configuration Modify redo transport services to serve your needs Oracle Database 10g: Data Guard Administration 6 - Data Protection Modes and Redo Transport Modes A data protection mode requires a specific redo transport mode. A redo transport mode alone does not define a data protection mode. Data Protection Modes and Redo Transport Modes When you define a redo transport mode, you are configuring the shipment of log files from the primary database to the standby database (physical or logical). You must set your redo transport mode to support the protection mode that you want for your configuration. However, configuring the redo transport mode alone does not set up the protection mode. After you set up the redo | Configuring Data Protection Modes and Redo Transport Services Oracle Database 10g: Data Guard Administration 6 - Objectives After completing this lesson, you should be able to do the following: Describe the data protection modes Change the data protection mode of your configuration Modify redo transport services to serve your needs Oracle Database 10g: Data Guard Administration 6 - Data Protection Modes and Redo Transport Modes A data protection mode requires a specific redo transport mode. A redo transport mode alone does not define a data protection mode. Data Protection Modes and Redo Transport Modes When you define a redo transport mode, you are configuring the shipment of log files from the primary database to the standby database (physical or logical). You must set your redo transport mode to support the protection mode that you want for your configuration. However, configuring the redo transport mode alone does not set up the protection mode. After you set up the redo transport mode, you can put the configuration into the desired data protection mode. The data protection mode setting causes internal rules to be implemented, ensuring that your configuration is protected at the level you desire. Oracle Database 10g: Data Guard Administration 6 - Defining the Redo Transport Mode Use the attributes of LOG_ARCHIVE_DEST_n: ARCH and LGWR Specify that either the archiver process or the log writer process is responsible for transmitting redo to the standby destination ARCH is the default. SYNC and ASYNC (LGWR only) Specify that network I/O operations are to be performed synchronously or asynchronously when using LGWR SYNC is the default. AFFIRM and NOAFFIRM Ensure that redo has been successfully written to disk on the standby destination NOAFFIRM is the default. Attributes of LOG_ARCHIVE_DEST_n The following attributes of the LOG_ARCHIVE_DEST_n initialization parameter define the redo transport mode that is used by the primary database to send redo to .
