58 lines
1.8 KiB
Markdown
58 lines
1.8 KiB
Markdown
[[!meta title="Splitting a git-annex repository"]]
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Note: this is the reverse of [[migrating two seperate disconnected directories to git annex]].
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I have a [git annex](https://git-annex.branchable.com/) repo for all my media
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that has grown to 57866 files and git operations are getting slow, especially
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on external spinning hard drives, so I decided to split it into separate
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repositories.
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This is how I did it, with some help from `#git-annex`. Suppose the old big repo is at `~/oldrepo`:
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```
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# Create a new repo for photos only
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mkdir ~/photos
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cd photos
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git init
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git annex init laptop
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# Hardlink all the annexed data from the old repo
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cp -rl ~/oldrepo/.git/annex/objects .git/annex/
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# Regenerate the git annex metadata
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git annex fsck --fast
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# Also split the repo on the usb key
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cd /media/usbkey
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git clone ~/photos
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cd photos
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git annex init usbkey
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cp -rl ../oldrepo/.git/annex/objects .git/annex/
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git annex fsck --fast
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# Connect the annexes as remotes of each other
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git remote add laptop ~/photos
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cd ~/photos
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git remote add usbkey /media/usbkey
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```
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At this point, I went through all repos doing standard cleanup:
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```
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# Remove unneeded hard links
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git annex unused
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git annex dropunused --force 1-12345
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# Sync
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git annex sync
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```
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To make sure nothing is missing, I used `git annex find --not --in=here`
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to see if, for example, the usbkey that should have everything could be missing
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some thing.
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Update: Antoine Beaupré pointed me to
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[this tip about Repositories with large number of files](http://git-annex.branchable.com/tips/Repositories_with_large_number_of_files/)
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which I will try next time one of my repositories grows enough to hit a performance issue.
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> This document was originally written by [Enrico Zini](http://www.enricozini.org/blog/2017/debian/splitting-a-git-annex-repository/) and added to this wiki by [[anarcat]].
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