@@ is contained in a command file, then
filename directs RMAN to look for the specified filename in the same directory as the command file from which it was called. If not used within a command file, the
@@ command is identical to the
@ (at sign) command.
The command file must contain complete RMAN commands.
The command file is local to the RMAN client. The name resolution of the file is dependent on the operating system. For example,
@tmp/cmd1.rman in UNIX or Windows means that
tmp is a subdirectory of the current directory and that the file
cmd1.rman is in this subdirectory.
To illustrate the differences between the
@@ commands, assume that you invoke RMAN as follows:
% rman TARGET / RMAN> @/tmp/cmd1.rman
Assume that the command
@@cmd2.rman appears inside the
cmd1.rman script. In this case, the
@@ command directs RMAN to search for the file
cmd2.rman in the directory
As with the
@ command, you can specify substitution variables in a command file and then pass values to the command file during execution of
@@ (see Example 2-4).
||Specifies the name of a command file, for example,
The following operating system commands create command files
% echo "BACKUP ARCHIVELOG ALL;" > /tmp/bkup_logs.rman % echo "BACKUP TAG &1 DATABASE;" > /tmp/bkup_db.rman % echo "@@bkup_logs.rman" >> /tmp/bkup_db.rman
The following example starts RMAN from the command line and connects to the target database with operating system authentication. The
@ command executes
bkup_db.rman, which contains the command
@@ command specifies that RMAN should look for the
bkup_logs.rman script in the same directory in which
bkup_db.rman is located. Note that the example uses a substitution variable to specify the tag
WHOLE_DB for the database backup.
% rman TARGET / RMAN> @/tmp/bkup_db.rman whole_db