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Diffstat (limited to 'doc/walkthrough/automatically_managing_content.mdwn')
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1 files changed, 38 insertions, 0 deletions
diff --git a/doc/walkthrough/automatically_managing_content.mdwn b/doc/walkthrough/automatically_managing_content.mdwn new file mode 100644 index 000000000..74a4c1b5b --- /dev/null +++ b/doc/walkthrough/automatically_managing_content.mdwn @@ -0,0 +1,38 @@ +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 rather too many copies of `other_file` and perhaps not enough of the +other 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 -- usb drive <-- here + 7570b02e-15e9-11e0-adf0-9f3f94cb2eaa -- backup drive + +What would be handy is some automated versions of get and drop, that only +get a file if there are not yet enough copies of it, or only drop 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 -- usb drive <-- here + whereis other_file (2 copies) + 0c443de8-e644-11df-acbf-f7cd7ca6210d -- laptop + 7570b02e-15e9-11e0-adf0-9f3f94cb2eaa -- backup drive |