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Once you have multiple repositories, and have perhaps configured numcopies,
any given file can have many more copies than is needed, or perhaps fewer
than you would like. How to manage this?
The whereis subcommand can be used to see how many copies of a file are known,
but then you have to decide what to get or drop. In this example, there
are perhaps not enough copies of the first file, and too many of the second
file.
# cd /media/usbdrive
# git annex whereis
whereis my_cool_big_file (1 copy)
0c443de8-e644-11df-acbf-f7cd7ca6210d -- laptop
whereis other_file (3 copies)
0c443de8-e644-11df-acbf-f7cd7ca6210d -- laptop
62b39bbe-4149-11e0-af01-bb89245a1e61 -- here (usb drive)
7570b02e-15e9-11e0-adf0-9f3f94cb2eaa -- backup drive
What would be handy is some automated versions of get and drop, that only
gets a file if there are not yet enough copies of it, or only drops a file
if there are too many copies. Well, these exist, just use the --auto option.
# git annex get --auto --numcopies=2
get my_cool_big_file (from laptop...) ok
# git annex drop --auto --numcopies=2
drop other_file ok
With two quick commands, git-annex was able to decide for you how to
work toward having two copies of your files.
# git annex whereis
whereis my_cool_big_file (2 copies)
0c443de8-e644-11df-acbf-f7cd7ca6210d -- laptop
62b39bbe-4149-11e0-af01-bb89245a1e61 -- here (usb drive)
whereis other_file (2 copies)
0c443de8-e644-11df-acbf-f7cd7ca6210d -- laptop
7570b02e-15e9-11e0-adf0-9f3f94cb2eaa -- backup drive
The --auto option can also be used with the copy command,
again this lets git-annex decide whether to actually copy content.
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