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QR Code Reader Java App - Download for free on PHONEKY. You can create operating system command files for regularly scheduled RMAN backup jobs. Inside a command file, you can use the @filename syntax to specify a command file that you want RMAN to execute. For example, you can create a command file named testfile1 with the following RMAN command: BACKUP DATABASE PLUS ARCHIVELOG; You can then run the command file testfile1 from the operating system command line as follows: $ rman target / @testfile1 Note that you can also specify the @filename syntax at the RMAN prompt to execute a command file, as shown here: RMAN> @testfile1 You can also specify the USING clause at the command-line prompt to specify values for use in substitution variables in a command file, thus making a command file dynamic. I provide a simple example that shows how to create and execute a dynamic shell script. The script calls a command file that contains the substitution variables. 1. Create a command file (monthly_backup.cmd) that uses substitution variables, as shown here: #monthly_backup.cmd CONNECT TARGET / RUN { ALLOCATE CHANNEL c1 DEVICE TYPE sbt PARMS 'ENV=(OB_MEDIA_FAMILY=&1)'; BACKUP DATABASE TAG &2 FORMAT '/u02/app/oracle/bck/&1%U.bck' RESTORE POINT &3; } EXIT; The command file monthly_backup.cmd uses three substitution variables to name the tape set, to provide the FORMAT string specification, and to name the restore point. 2. Next, create a shell script you ll use to run the monthly_backup.cmd file. The shell script mybackup.sh contains three shell variables, and you can pass the values for those variables at the command line when you execute the script. #!/bin/tcsh # name: mybackup.sh # usage: use the tag name and number of copies as arguments set media_family = $argv[1] set format = $argv[2]set restore_point = $argv[3] rman @'/u01/app/oracle/scripts/monthly_backup.cmd' USING $media_family $format $restore_point Now you have a shell script (mybackup.sh) that you can execute by passing arguments at the command line to specify values for our three substitution variables. 3. Execute the mybackup.sh shell script, as shown here: % mybackup.sh archival_backup bck0906 FY06Q3 Each time you run the mybackup.sh script, you can specify different values for the three substitution variables, right at the command line. If the parameters are passed by reference, or contain references, the callee might have access to objects in the caller s space Malicious or misbehaving callees could unexpectedly change variables in the caller s space The last problem, marshaling overhead, should be considered when parameters are passed by reference In this case, the system must set up a proxy object in the callee s space, which connects back to the referenced object on the caller s side Apart from security concerns, there is a nontrivial run-time performance hit to support calls by reference.. qr code scanner for java mobile Full stable QR code scanner android app. - GitHub
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