oracle 12c backup and recovery

Tags: pass img--led exp Next table space control file bleZhang QiweiDate: April 21, 2017Capabilities: Understanding Oracle's backup and recovery mechanisms1. Archive mode and non-archive modeThe Oracle database requires at least two sets of online logs, which will continue to be written to the next set of online logs whenever a set of online logs fills up. In the

oracle| Backup | notes | recovery | data Data backup Either way, the backup of the database is a backup of the data file/control File/redo file. 1, exp/imp Backup mode 2. Offline

Original: Oracle Base database backup and RecoveryFirst, why need data backupThe main reasons for data loss:1, media failure.2, the user's error operation.3, the server's complete collapse.4, computer viruses.5. Unforeseen factors.The fault types in Oracle are divided into the following 4 categories.　　1. Statement failure:A logical failure to execute a SQL statem

file 1. SQL> shutdown abort 2. SQL> startup Error message ora-00205 control file error or ora-00227 control file bad block, database started to started status3. manually create a control file SQL> create controlfile reuse (/set) database "database Name" noresetlogs (/resetlogs is used only when online logs is corrupted) noarchivelog MAXLOGFILES 16 MAXLOGMEMBERS 3 MAXDATAFILES 100 MAXINSTANCES 8 # MAXLOGHISTORY 4672 LOGFILE GROUP 1 'Directory of redo log 1 'SIZE 50 M, GROUP 2 'Directory of redo

another location during cold backup. The fastest and safest way to back up Oracle information during cold backup. Advantages of cold backup:1. It is a very fast backup method (just copy files)2. Easy to archive (simple copy)3. It is easy to restore to a certain point in tim

Oracle rman database backup and recovery in non-archive mode, mongolerman1. database Backup SQL> archive log list in non-archive mode; automatic archiving in non-archive mode in Database Log mode disable the archiving end point USE_DB_RECOVERY_FILE_DEST the earliest online log sequence 3244 the current log sequence 324

This article makes it possible to discover some of the problems of backup during the recovery process by using a complete backup of Oracle 10g RAC Rman for a different machine recovery process. such as the redundancy of the Regulation log, control the use of automatic

time. (1) Adjust I/O I/O contention lowers the speed of the system. Poor I/O distribution affects not only the performance of the database, but also the backup and restore times, because Rman is another process (or multiple processes in parallel) that is competing for I/O time on the device. Backup is a read-intensive (read-intensive) operation. If I/O distribution is poor, not only will rman performanc

Oracle 10 Gb rman backup and recovery 4 nocatalog rman recover dbid used to restore spfile and controlfile use configure controlfile autobackup on; backup database plus archivelog delete input; backup supplement RMAN> show all2>; RMAN configuration parameters are: configure

Tags: backing up Oracle RecoveryBackup:Defined:The process of copying a database to a dump device.Dump device:The tape or disk where the database copy is placed.Backup of the original database:A copy of the database stored in a dump device.Classification:Physical and logical angles:Physical Backup:A backup of the physical files (data files, control files, log files) of the database.Divided into:Offline

Part 3 backup and recovery[Q] How to enable/disable Archiving[A] If archiving is enabled, ensure log_archive_start = true to enable automatic archiving. Otherwise, only manual archiving is supported. If archiving is disabled, set this parameter to false. Note: in the OPS/RAC environment, You Need To comment out parallel_server = true first, then perform the following steps, and then use this parameter to re

Oracle Clusterware puts the entire cluster's configuration information on shared storage, which includes a list of cluster nodes, a cluster database instance to a node map, and CRS application resource information. It is also stored on an OCR disk (or OCFS file). Therefore, the importance of this configuration file is self-evident. Any action that makes an OCR configuration change is recommended to back up OCR immediately between operations or after.

Oracle Database recovery and backup 1. oracle database recovery 1. restore the deleted data. delete from emp e where e. empname = 'Smith 'select * from flashback_transaction_query f where f. the statements below table_name = 'emp' UNDO _ SQL are the opposite operations for d

password: ALTER user SYS identified by Ninestar123;Oracle failure, error file deletion: Alter DATABASE datafile '/u01/app/oracle/oradata/g6.ora ' offlinedrop; ALTER DATABASE datafile '/u01/app/oracle/oradata/g6a02.ora ' offline drop;Query database for lock table: SELECT * FROM Fw_lockresource R where R.isfree = 0;Delete Orac