Oracle Database 11 g - Online Public Access Catalog

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398 CHAPTER 9 ■ STORAGE MANAGEMENTcpAnybody who has been supporting ASM on a day-to-day basis will admit that the copy command(cp) is the most anticipated ASM enhancement. Now, DBAs can copy ASM-supported filesusing the standard cp command from the asmcmd utility. The asmcmd cp command can be usedto copy files in these situations:• From local diskgroup to another local diskgroup• From diskgroup to OS• From OS to diskgroup• From local diskgroup to a remote diskgroupIn addition, the asmcmd cp command can be used to copy all ASM-supported files suchas Data Pump dump files, spfiles, block change tracking files, controlfiles, Data Guard Brokerconfiguration files, and so on. The cp command has the following options:cp [-ifr] The three flags, -ifr, are similar to the flags from the Unix cp, rcp, and scp commands(interactive, force, and recursive copy). The interactive option prompts prior to a file overwrite.The force option will remove an existing file and perform a copy.We’ll now show some examples of using the copy command to copy files in and out ofASM. Let’s start by copying a Data Pump dump file from the OS into the ASM DATA diskgroup:ASMCMD [+] > cp /home/oracle/encrypted.dmp +datasource /home/oracle/encrypted.dmptarget +data/encrypted.dmpcopying file(s)...file, +DATA/encrypted.dmp, copy committed.ASMCMD [+] > cd +dataASMCMD [+data] > ls -ltrType Redund Striped Time Sys NameY ASMTESTING/Y DBA10G/Y DBA11G/N encrypted.dmp =>+DATA/ASMTESTING/DUMPSET/TESTING.296.632600587Only ASM-supported files are allowed to be copied into ASM. If you attempt to copy in anon-ASM file such as a text file, an error message will be generated.Now let’s copy an Oracle datafile from one ASM instance to another ASM instance. InOracle Database 11g, an active database is no longer required to transfer files between oneASM instance diskgroup to another. We will copy one of the docs_d1 datafiles from the ASMinstance on rac103 to another ASM instance on rac1. A database named DBA11g1 is running on theremote database server. In this example, we will rename the datafile from +DATA/DBA11g/DATAFILE/DOCS_D1.289.631914611 to xxx on the process:ASMCMD [+DATA/DBA11g/DATAFILE] > cp+DATA/DBA11g/DATAFILE/DOCS_D1.289.631914611
CHAPTER 9 ■ STORAGE MANAGEMENT 399sys@rac1.+ASM:+DATA/DBA11g1/datafile/xxxEnter password: *********source +DATA/DBA11g/DATAFILE/DOCS_D1.289.631914611target +DATA/DBA11g1/datafile/xxxcopying file(s)...file, +DATA/dba11g1/datafile/xxx, copy committed.The syntax for the remote ASM diskgroup copy is as follows:cp [srcfile] username@..:The username can be any username in the ASM instance that has the sysasm privilege.Notice the dot (.) notation between the hostname and the ASM instance. The port assignmentis optional if the LISTENER is not listening on port 1521. The last delimiter is a colon (:) followedby the fully qualified directory or file name. Note that the target ASM instance must be registeredwith the LISTENER for the remote copy between ASM diskgroups to work.You can verify on the remote ASM instance that the copied file exists:ASMCMD> pwd+DATA/DBA11G1/DATAFILEASMCMD> ls -l xxxType Redund Striped Time Sys NameN xxx => +DATA/ASMTESTING/DATAFILE/TESTING.278.632611175You will also notice that the xxx file is created as an alias, and the actual file resides in the+DATA/ASMTESTING/DATAFILE directory. Because we specified the fully qualified file name, OMFwill create an alias.Another important point to note is that the -f option does not work with aliases. In thefollowing example, we attempt to overwrite an existing alias, which results in an ORA-15005 error:ASMCMD [+DATA/DBA11g/DATAFILE] > cp –f+DATA/DBA11g/DATAFILE/DOCS_D1.289.631914611sys@rac1.+ASM:+DATA/DBA11g1/datafile/docs_d1.dbfEnter password: *********errorsource +DATA/DBA11g/DATAFILE/DOCS_D1.289.631914611target +DATA/DBA11g1/datafile/docs_d1.dbfASMCMD-08015: can not create file->'+DATA/DBA11g1/datafile/docs_d1.dbf'ORA-15056: additional error messageORA-17502: ksfdcre:4 Failed to create file +DATA/dba11g1/datafile/docs_d1.dbfORA-15005: name "dba11g1/datafile/docs_d1.dbf" is already used by an existing aliasORA-06512: at "SYS.X$DBMS_DISKGROUP", line 142ORA-06512: at line 3 (DBD ERROR: OCIStmtExecute)ASMCMD-08016: copy source->'+DATA/DBA11g/DATAFILE/DOCS_D1.289.631914611'and target->'+DATA/DBA11g1/datafile/docs_d1.dbf' failedContinuing with the cp examples, this is how to perform a datafile copy from one directoryto another directory on the local ASM instance:
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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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58 CHAPTER 2 ■ DATABASE DIAGNOSAB
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100 CHAPTER 3 ■ DATABASE ADMINIST
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168 CHAPTER 4 ■ PERFORMANCE MANAG
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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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CHAPTER 7 ■ DATA PUMP 335If you a
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338 CHAPTER 8 ■ ORACLE STREAMSLat
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340 CHAPTER 8 ■ ORACLE STREAMSA s
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342 CHAPTER 8 ■ ORACLE STREAMSSQL
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344 CHAPTER 8 ■ ORACLE STREAMSThe
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448 CHAPTER 11 ■ APPLICATION DEVE
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CHAPTER 12■ ■ ■Data Warehousi
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566 ■INDEXadvise failure command,
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