Oracle Database 11 g - Online Public Access Catalog

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416 CHAPTER 10 ■ DATA GUARD• Logical standby database improvements• Redo log compression• Data Guard Broker enhancements• Recovery Manager (RMAN) integration with Data Guard• Rolling upgrades with the physical standby• Fast-start failover improvementsActive Physical Standby Database DuplicationRMAN network-based duplication is one of the key new Oracle Database 11g features; with it,you can clone a database without a backup of the primary database server. This section willprovide simple steps for creating a physical standby from an active database using RMAN.Some preparation steps are required prior to initiating an active physical standby databaseduplication over the network. First, create a blank initialization file with just one parameter in thefile, specifically, DB_NAME=PRIMARY_DATABASE{DR} in the $ORACLE_HOME/dbs directory.Second, the password file for sys must be the same on both the primary and Data Guardservers. You must use sftp/scp to transfer the files from the primary $ORACLE_HOME/dbs directory tothe disaster recovery database server. You also need to create the required Oracle Database 11gOptimal Flexible Architecture (OFA)–related directories:• $ORACLE_BASE/admin/$ORACLE_SID/adump• $ORACLE_BASE/admin/$ORACLE_SID/pfile• $ORACLE_BASE/admin/$ORACLE_SID/walletNow, it’s time to create the listener.ora and tnsnames.ora file entries on both the primaryand disaster recovery nodes. You need to make sure the appropriate entries are on both of thetnsnames.ora files. If you are planning to use the broker, you need to pay particular attention tothe LISTENER file’s global_dbname parameter. The name of global_dbname must include the_dgmgrl parameter to it. For example, the following listener.ora entry is provided with theappropriate global_dbname parameter:SID_LIST_LISTENER =(SID_LIST =(SID_DESC =(SID_NAME = PLSExtProc)(ORACLE_HOME = /apps/oracle/product/11.1.0/DB)(PROGRAM = extproc))(SID_DESC =(GLOBAL_DBNAME = DBA11gDR_DGMGRL.dbaexpert.com)(ORACLE_HOME = /apps/oracle/product/11.1.0/DB)(SID_NAME = DBA11gDR)))
CHAPTER 10 ■ DATA GUARD 417LISTENER =(DESCRIPTION_LIST =(DESCRIPTION =(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))(ADDRESS = (PROTOCOL = TCP)(HOST = bpo40.dbaexpert.com)(PORT = 1521))))After the appropriate changes are made, the database instance and the listeners need to berestarted on both the primary and physical standby database servers.Lastly, the standby redo logs should be added on the primary standby database so thatthey will be duplicated as part of the active network–based physical standby duplication.Mike Smith, a principal member of the technical staff in the High Availability group atOracle, has provided a script to build a standby database. This RMAN script can single-handedlycreate a physical standby database over the network. This single integrated RMAN script willduplicate the source database over the network, copy the spfile, copy the controlfile, and duplicatethe database. During the process, both the primary and standby initialization parameters will beupdated to accommodate the Data Guard configuration.You can use the following script to create a physical standby database from the remote node:rman
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The EXPERT’s VOIce ® IN ORACLEAl
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Contents at a GlanceAbout the Autho
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■CONTENTSixSQL*Plus New Features
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■CONTENTSxiEnterprise Manager Int
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■CONTENTSxiiiCombined Capture and
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■CONTENTSxvImprovements in Redo T
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About the Authors■SAM ALAPATI is
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xxii■ACKNOWLEDGMENTSNothing I do
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xxiv■INTRODUCTIONPerformance Mana
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xxvi■INTRODUCTION• The easy add
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xxviii■INTRODUCTION• The flashb
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2 CHAPTER 1 ■ INSTALLING, UPGRADI
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10 CHAPTER 1 ■ INSTALLING, UPGRAD
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58 CHAPTER 2 ■ DATABASE DIAGNOSAB
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100 CHAPTER 3 ■ DATABASE ADMINIST
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226 CHAPTER 5 ■ DATABASE SECURITY
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266 CHAPTER 6 ■ BACKUP AND RECOVE
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CHAPTER 7■ ■ ■Data PumpDBAs a
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CHAPTER 7 ■ DATA PUMP 315if test
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CHAPTER 7 ■ DATA PUMP 317DBA11g1
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CHAPTER 7 ■ DATA PUMP 319Encrypti
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CHAPTER 7 ■ DATA PUMP 321Please b
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CHAPTER 7 ■ DATA PUMP 323Remappin
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CHAPTER 7 ■ DATA PUMP 325SELECT d
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CHAPTER 7 ■ DATA PUMP 327Document
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CHAPTER 7 ■ DATA PUMP 329SQL> sel
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CHAPTER 7 ■ DATA PUMP 331SQL> sel
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CHAPTER 7 ■ DATA PUMP 333DBMS_OUT
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342 CHAPTER 8 ■ ORACLE STREAMSSQL
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348 CHAPTER 8 ■ ORACLE STREAMSDBM
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CHAPTER 9■ ■ ■Storage Managem
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CHAPTER 9 ■ STORAGE MANAGEMENT 36
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CHAPTER 12■ ■ ■Data Warehousi
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566 ■INDEXadvise failure command,
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568 ■INDEXDBMS_ADDM package, 216-
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600 ■INDEXOracle Audit Vault, 259
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