标签云
asm恢复 bbed bootstrap$ dul In Memory kcbzib_kcrsds_1 kccpb_sanity_check_2 kfed MySQL恢复 ORA-00312 ORA-00607 ORA-00704 ORA-01110 ORA-01555 ORA-01578 ORA-08103 ORA-600 2131 ORA-600 2662 ORA-600 2663 ORA-600 3020 ORA-600 4000 ORA-600 4137 ORA-600 4193 ORA-600 4194 ORA-600 16703 ORA-600 kcbzib_kcrsds_1 ORA-600 KCLCHKBLK_4 ORA-15042 ORA-15196 ORACLE 12C oracle dul ORACLE PATCH Oracle Recovery Tools oracle加密恢复 oracle勒索 oracle勒索恢复 oracle异常恢复 Oracle 恢复 ORACLE恢复 ORACLE数据库恢复 oracle 比特币 OSD-04016 YOUR FILES ARE ENCRYPTED 勒索恢复 比特币加密文章分类
- Others (2)
- 中间件 (2)
- WebLogic (2)
- 操作系统 (102)
- 数据库 (1,679)
- DB2 (22)
- MySQL (73)
- Oracle (1,541)
- Data Guard (52)
- EXADATA (8)
- GoldenGate (24)
- ORA-xxxxx (159)
- ORACLE 12C (72)
- ORACLE 18C (6)
- ORACLE 19C (14)
- ORACLE 21C (3)
- Oracle 23ai (7)
- Oracle ASM (67)
- Oracle Bug (8)
- Oracle RAC (52)
- Oracle 安全 (6)
- Oracle 开发 (28)
- Oracle 监听 (28)
- Oracle备份恢复 (563)
- Oracle安装升级 (92)
- Oracle性能优化 (62)
- 专题索引 (5)
- 勒索恢复 (79)
- PostgreSQL (18)
- PostgreSQL恢复 (6)
- SQL Server (27)
- SQL Server恢复 (8)
- TimesTen (7)
- 达梦数据库 (2)
- 生活娱乐 (2)
- 至理名言 (11)
- 虚拟化 (2)
- VMware (2)
- 软件开发 (37)
- Asp.Net (9)
- JavaScript (12)
- PHP (2)
- 小工具 (20)
-
最近发表
- 解决oracle数据文件路径有回车故障
- .wstop扩展名勒索数据库恢复
- Oracle Recovery Tools工具一键解决ORA-00376 ORA-01110故障(文件offline)
- OGG-02771 Input trail file format RELEASE 19.1 is different from previous trail file form at RELEASE 11.2.
- OGG-02246 Source redo compatibility level 19.0.0 requires trail FORMAT 12.2 or higher
- GoldenGate 19安装和打patch
- dd破坏asm磁盘头恢复
- 删除asmlib磁盘导致磁盘组故障恢复
- Kylin Linux 安装19c
- ORA-600 krse_arc_complete.4
- Oracle 19c 202410补丁(RUs+OJVM)
- ntfs MFT损坏(ntfs文件系统故障)导致oracle异常恢复
- .mkp扩展名oracle数据文件加密恢复
- 清空redo,导致ORA-27048: skgfifi: file header information is invalid
- A_H_README_TO_RECOVER勒索恢复
- 通过alert日志分析客户自行对一个数据库恢复的来龙去脉和点评
- ORA-12514: TNS: 监听进程不能解析在连接描述符中给出的SERVICE_NAME
- ORA-01092 ORA-00604 ORA-01558故障处理
- ORA-65088: database open should be retried
- Oracle 19c异常恢复—ORA-01209/ORA-65088
标签归档:adg_redirect_dml
Oracle 19C 备库DML重定向—DML Redirection
在19c之前,oracle Data Guard备用数据库上不能执行DML操作,但是,从19c开始备库就可以进行DML操作了;Active Data Guard备用数据库上运行DML操作,可以在备用数据库上运行只读应用程序,偶尔执行DML(太频繁影响主库性能),备库上的DML操作可以透明地重定向到主数据库并在主数据库上运行。也包括PL/SQL块中的DML语句。Active Data Guard会话将等待,直到将相应的更改发送到Active Data Guard备用数据库并将其应用于Active Data Guard备用数据库为止。在DML操作期间将保持读取一致性,并且运行DML的备用数据库可以查看其未提交的更改。但是,所有其他备用数据库实例只有在提交事务后才能查看这些更改。
在主库上创建测试表
SQL> select * from v$version; BANNER -------------------------------------------------------------------------------- BANNER_FULL -------------------------------------------------------------------------------- BANNER_LEGACY -------------------------------------------------------------------------------- CON_ID ---------- Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.5.0.0.0 Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production 0 SQL> select database_role ,open_mode from v$database; DATABASE_ROLE OPEN_MODE ---------------- -------------------- PRIMARY READ WRITE SQL> create table system.t_xff as select * from dba_objects; Table created. SQL> select count(*) from system.t_xff; COUNT(*) ---------- 72407
在备库上进行dml操作
SQL> select database_role ,open_mode from v$database; DATABASE_ROLE OPEN_MODE ---------------- -------------------- PHYSICAL STANDBY READ ONLY WITH APPLY SQL> select count(*) from system.t_xff; COUNT(*) ---------- 72407 SQL> alter session enable adg_redirect_dml; Session altered. SQL> delete from system.t_xff; 72407 rows deleted. SQL> commit; Commit complete.
在主库上验证备库dml操作结果
SQL> select count(*) from system.t_xff; COUNT(*) ---------- 0 SQL>
在18c中可以通过_enable_proxy_adg_redirect隐含参数实现dml重定向