TAILIEUCHUNG - RMAN Maintenance

Cross Checks of RMAN Backups and Copies Performing a cross check provides you with a way to ensure that data about backup sets and image copies in the RMAN repository is synchronized with corresponding data on disk or in the media management catalog. You can use the LIST command to obtain a report of the backups and copies that you have made and then use the CROSSCHECK command to check that these files still exist. If RMAN cannot find a file, it updates the repository records to EXPIRED. You can determine which files are marked EXPIRED by issuing a LIST EXPIRED command | RMAN Maintenance Objectives After completing this lesson, you should be able to do the following: Perform cross-checking of backups and copies Update the repository when backups have been deleted Change the availability status of backups and copies Make a backup or copy exempt from the retention policy Catalog backups made with operating system commands Cross Checking Backups and Copies Use the CROSSCHECK command to: Ensure repository information is synchronized with actual files Check the status of a backup or copy Update the repository when files have been deleted with operating system commands Cross Checks of RMAN Backups and Copies Performing a cross check provides you with a way to ensure that data about backup sets and image copies in the RMAN repository is synchronized with corresponding data on disk or in the media management catalog. You can use the LIST command to obtain a report of the backups and copies that you have made and then use the CROSSCHECK command to check that these files still exist. If RMAN cannot find a file, it updates the repository records to EXPIRED. You can determine which files are marked EXPIRED by issuing a LIST EXPIRED command. Then, you can run DELETE EXPIRED to remove the repository records for all expired files. If the backup or copy is on disk, then the CROSSCHECK command determines whether the header of the backup piece is valid. If the backup is on tape, then the command simply checks that the backups exist. The CROSSCHECK Command Cross-check all backups in the database: Cross-check all copies in the database: CROSSCHECK BACKUPSET OF DATABASE; CROSSCHECK COPY; Using the CROSSCHECK Command You can issue the CROSSCHECK BACKUPSET command to cross-check backup sets, backup pieces, and proxy copies created by media management software. By default, RMAN cross-checks backups of the whole database. You can issue the CROSSCHECK COPY command to cross check datafile copies, control file copies, archived redo logs, and image copies of .

TỪ KHÓA LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.