37 lines
1.7 KiB
Text
37 lines
1.7 KiB
Text
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### Please describe the problem.
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I have a main annex with ~2TB of data. In the past is was using SHA256 then I migrated to SHA256E . Recently it was becoming quite full so I took some spare HD and cloned it and moved data from the main to the spares. To my surprise, the main annex disk usage did not go down a bit.
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It took me some time to understand why . The problem is exemplified by the shell script <http://mennucc1.debian.net/git-annex/git-annex-no-dedup.sh> .
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In short, if a annex is migrated to a new backend and afterwards files are moved, then the hardlinks are broken, and disk usage doubles.
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### What steps will reproduce the problem?
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run above script
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### What version of git-annex are you using? On what operating system?
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5.20141125 on Debian Jessie amd64
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### Please provide any additional information below.
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Of course a simple solution would be to drop all unused files. This is ugly , though, because it does not distinguish between
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(1) unused files that are previous copies of files I care about (2) unused files that are due to the problem described in the example, and that I do not care about.
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A more complex but more elegant solution would be:
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(a) when a file is migrated , the old and new objects in the annex are hardlinked; moreover two symlinks should be creates, so that git-annex knows at a glance which two files are hardlinked (see <http://mennucc1.debian.net/git-annex/cross_links.txt> for example)
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(b) when moving of copying files, all hardlinked versions whould be move/copied
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(c) when dropping , an option may be used to specify if all hardlinked versions should be dropped alltogether
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### bye
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and thanks, A.
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### ps
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I tried to attach two files to this bug report but failed
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