BLOCK CHANGE TRACKING
About Block Change Tracking
If block change tracking is enabled on a primary or standby database, then RMAN uses a block change tracking file to identify changed blocks for incremental backups. By reading this small bitmap file to determine which blocks changed, RMAN avoids having to scan every block in the data file that it is backing up.
Block change tracking is disabled by default. Nevertheless, the benefits of avoiding full data file scans during backup are considerable, especially if only a small percentage of data blocks are changed between backups. If your backup strategy involves incremental backups, then block change tracking is recommended. Block change tracking does not change the commands used to perform. incremental backups. The change tracking file requires no maintenance after initial configuration.
You can only enable block change tracking at a physical standby database if a license for the Oracle Active Data Guard option is enabled.
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/26764973/viewspace-751148/ ，如需转载，请注明出处，否则将追究法律责任。
最新文章
- mysql 5.7 新特性中在线in-place 修改字段的大小
- ORACLE 11G 静默安装soft db listener
- vsphere 虚拟机在线添加磁盘linux
- linux 缩减LV大小
- ORA-600:[kcbzwfcro_2] Reported in Alert.log (文档 ID 2085507.1)
- WRH$_ACTIVE_SESSION_HISTORY
- 索引重建的必要性与影响 (Doc ID 1525787.1)
- ORACLE 11g R2 RAC 11.2.0.2.12 PSU 安装升级
- List of Oracle Database Patch Set Updates (PSU)
- ORA-00245: control file backup operation failed
