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stability analysis

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Joey Hess 2014-01-20 17:11:02 -04:00
parent b7828ec22e
commit 5ddbd24a1c
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22
doc/todo/preferred_content_numcopies_check.mdwn
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@ -56,6 +56,26 @@ Conclusion:
for a particular file. It should ignore the other ways to specify
numcopies.
* Make the repo groups that currently end with "or (not copies=semitrusted+:1)"
to instead end with "or (not numcopiesneeded=1)"
to instead end with "or numcopiesneeded=1"
## Stability analysis
If a remote prefers eg, "blah or numcopiesneeded=1", and
file $foo does not match blah, but needs more copies, then then the
expression will match.
So, git-annex will get $foo, adding a copy. Which means that the
numcopiesneeded=1 will no longer match, so the file is no longer wanted
now that it has been downloaded.
Now there are two cases for what can happen:
* git-annex tries to drop $foo, but fails because it cannot find enough
other copies
* git-annex copies $foo to some other remote that wants it, and then
manages to drop $foo from the local remote.
This seems ok. Files flow through repos and they act like transfer
repos when there are not enough copies.
--[[Joey]]