Data Backup12-15
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You can enter the dump command at any time to back up data in a specified path.
After the dump command is finished, the data in the path is written to tape.
QIt takes a volume name as argument. The dump command backs
up all data in the specified volume that does not reside in a qtree.
You cannot perform incremental backups on data that is backed up
with the Q option. However, you can use both the Q option and u
option to record the backup in the /etc/dumpdates file. The entry in
the /etc/dumpdates file enables you to keep a history of the
backups.
uThe dump command updates the /etc/dumpdates file, which con-
tains the dump path, the dump level, and the creation time of the
snapshot used by the dump command. You must use this option if
you plan to perform incremental backups in the future.
XIt takes a string as argument. You can specify a comma-separated
list of strings. If the name of a file in the dump path matches one
of the strings, the dump command excludes that file from the
backup. Each string for the X option applies to files at every direc-
tory under the dump path.
The following list describes the rules for specifying the strings:
To exclude a file, the name of the file must match the string
exactly. For example, if you specify core, only those files
whose names are core are excluded. A file named a.core
is not excluded.
You can use the asterisk (*) as a wildcard character.
The wildcard character must be the first or last character of
the string. Each string can contain up to two wildcard charac-
ters. For example, you can specify *.core, core.*, or
*core.*, but not core*.1.
Because the strings in the list are comma-separated, if you
want to exclude files whose names contain a comma, pre-
cede the comma in the string with a backslash.
You can specify up to 32 strings for the X option.
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