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Oracle 11g archive log study _ 1, oracle11g ARCHIVE _ 1 Oracle Database Operations are recorded in the redo log for undo (rollback) Or redo (redo) in case of database exceptions ). Redo logs are divided into online logs and archive logs. Oracle has three online log files by default. Generally, these files are filled with one order and then written to the next one

Tags: Oracle RAC Archive1. Modify the archive Path parameterSqlplus/as SYSDBASql> alter system set log_archive_dest_1= ' Location=+asmarch ' scope=spfile sid= ' * ';2. Close the database and all nodes are closedSrvctl Stop database-d racdb3. Boot a node database to mount State 5 and modify the database's archive mode and start the databaseSrvctl start instance-d racdb-i racdb2-o Mountsql> ALTER DATABASE Arc

1. archive can only be changed under mount. SQL> shutdown immediateThe database has been closed.The database has been detached.The ORACLE routine has been disabled.SQL> startup mount;The ORACLE routine has been started. Total System Global Area 778387456 bytesFixed Size 1374808 bytesVariable Size 377488808 bytesDatabase Buffers 394264576 bytesRedo Buffers 5259264 bytesThe database has been loaded.SQL> alter database archivelog; The database has been c

Oracle 11g archive log study _ 4, oracle11g ARCHIVE _ 4 The change content is the core of converting oracle logs into SQL statements, and is also the most troublesome and most changing place. The meaning of opcode is that there are a lot of searches on the Internet. What is really useful to me is addition, deletion, and modification. I don't care about any search or index operations at all. 5.1: contains a

Oracle 11g archive log study _ 2, oracle11g ARCHIVE _ 2 Starting from Block 1, the block stores all oracle Operation Records. The block structure is very simple. There are only blocks and blocks:Typedef struct bk {Redo_bh blockhead; uint8_t buf [496];} Redo_bk; Redo_bk The block header is consistent with the one described in the previous article:Typedef struct bh {uint32_t signature; // signature uint32

* Nokia = [nsdata datawithcontentsofurl: url]; [Nokia writetofile: @ "/users/Apple/desktop/nokia.gif" atomically: Yes]; // if the system data is not encoded and archived, decoding and re-decoding // @ implementation Dog Two nscoding methods must be implemented-(void) encodewithcoder :( nscoder *) acder {[acder encodeobject: _ name forkey: kdognamekey];} -(ID) initwithcoder :( nscoder *) adecoder {self = [Super init]; If (Self) {self. name = [adecoder decodeobjectforkey: kdognamekey];} return se

The archive location is located in your computer as shown in the following figure: c:/users/your username/appdata/roaming/uplay/codex/saves/assassinscreedrogue The archive suffix is named Sav. Note: If we do not see this directory can be resolved as follows On the computer desktop, open "My Computer" or "Computer" (different system names have some differences), then, when we go to the interface, we cl

, enter help;Enter Exit to exit.Sql> RMAN;sp2-0042: Unknown Command "RMAN"-the remaining rows are ignored.Sql> select * from V$flash_recovery_area_usage; File_type percent_space_used percent_space_reclaimable Number_of_files------------ ------------------ ------------------------- ---------------Controlfile 0 0 0Onlinelog 0 0 0ARCHIVELOG. 33 0 3Backuppiece 0 0 0Imagecopy 0 0 0Flashbacklog 0 0 0 6 rows have been selected. Sql> Delete the useless archivelog. Enter Rman, commands

What is Oracle archive mode?The Oracle database has an online redo log, which records changes made to the database, such as inserting, deleting, updating data, etc., which are recorded in the online redo log. A generic database must have at least 2 online redo log groups. When an online redo log group is written full, a log switch occurs, the online redo log Group 2 becomes the currently used log, when the online redo log Group 2 is full, the log swit

Label:1. See if Oralce is an archive or non-archive mode Sql> select Name,log_mode from V$database; NAME Log_mode---------------------------------------- ------------------------------------YOON ARCHIVELOG Sql> select Name,log_mode from V$database; NAME Log_mode---------------------------------------- ------------------------------------YOON ARCHIVELOG sql> archive