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Joey Hess 2023-11-30 17:07:17 -04:00
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doc/forum/Revisiting_migration_and_multiple_keys.mdwn
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I have several workflows that rely on regular key migrations, and I would love to explore some ways that migrating keys could be improved. I have several workflows that rely on regular key migrations, and I would love to explore some ways that migrating keys could be improved.
I see there has already been discussion about this: I see there has already been discussion about this:
https://git-annex.branchable.com/todo/alternate_keys_for_same_content/ [[todo/alternate_keys_for_same_content]]
I don't know how often this comes up, but it comes up a lot for me. I have several data sources that I regularly index and mirror by constructing keys based on md5 and size, and assemble a repo with the known filename. (gdrive, many software distribution sites, and others). I don't know how often this comes up, but it comes up a lot for me. I have several data sources that I regularly index and mirror by constructing keys based on md5 and size, and assemble a repo with the known filename. (gdrive, many software distribution sites, and others).

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doc/forum/Revisiting_migration_and_multiple_keys/comment_2_b5545aba08c7af2f8f56caba66232c41._comment Normal file
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[[!comment format=mdwn
username="joey"
subject="""comment 2"""
date="2023-11-30T20:49:53Z"
content="""
There seem to be difficulties with both performance and with security in
storing information in the git-annex branch to declare that one key
is replaced by another one.
I wonder if there are any pain points that could be handled better without
recording such information in the git-annex branch. What do your helper
scripts do?
"""]]

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doc/forum/Revisiting_migration_and_multiple_keys/comment_3_a712ec9b616ca45976154fd0c98ae1c4._comment Normal file
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[[!comment format=mdwn
username="joey"
subject="""comment 3"""
date="2023-11-30T20:55:02Z"
content="""
I wonder if it would suffice to have a way for git-annex to record that key
A migrated to B, but not treat that as meaning that it should get B's
content when it wants A, or vice-versa.
Instead, when a repository learns that A was elsewhere migrated to B, it
could hardlink its content for A to B and update the location log for
B to say is has a copy. The same as if `git-annex migrate` were run locally.
(It could even hash the content and verify it got B.)
That wouldn't help if a special remote has the content of A, and
git-annex wants to get the content of B.
"""]]