Chg-disk: Difference between revisions
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{{deprecated|This changer, with its separate changerfile, is deprecated; see {{man|7|amanda-changers}}}} | |||
Clone of the chg-zd-mtx, but modified to be applied on local directories instead of tapes. This changer emulates a robot that uses virtual tapes instead of real ones, where the virtual tapes are real directories on a hard disk. | Clone of the chg-zd-mtx, but modified to be applied on local directories instead of tapes. This changer emulates a robot that uses virtual tapes instead of real ones, where the virtual tapes are real directories on a hard disk. | ||
Latest revision as of 18:55, 12 July 2010
This changer, with its separate changerfile, is deprecated; see amanda-changers(7)
Clone of the chg-zd-mtx, but modified to be applied on local directories instead of tapes. This changer emulates a robot that uses virtual tapes instead of real ones, where the virtual tapes are real directories on a hard disk.
The directory tree should be:
$slot_root_dir -|
|- info
|- data -> slot1/
|- slot1/
|- slot2/
|- ...
|- slotn/
Where "$slot_root_dir" appears in the tapedev as "file:$slot_root_dir", and "n" is the tapecycle parameter.
A plain VFS Device is given a directory $DIR, and stores dumps in $DIR/data. This changer uses a symlink to point $DIR/data to the requested slot -- a clever trick. As a result, it is not possible to manually point an application directly at a slot:
amrestore tape:$slot_root_dir/slot7 # DOESN'T WORK
instead, use amtape to "load" that slot:
amtape CONFIG slot 7
or set the symlink manually:
( cd $slot_root_dir; rm data; ln -s slot7 data )
See amanda-changers(7) for more information about this and other Amanda changer scripts.