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Working this week on a long missing capability of git-annex: The ability to
time out, and perhaps retry, a transfer that has gotten stuck.
It's a lot harder than it sounds, because to get it right with no resource
leaks, every process and child thread that git-annex runs has to be stopped
by a timeout too, which the current code base was not designed for at all.
[[gory details here|todo/more_extensive_retries_to_mask_transient_failures]]
So far I have most processes being stopped, and that took 2 solid days.
This may take a while to finish. I do think though, that once the basic
operation of stopping a transfer is available, there will be other uses
besides timeouts.
One I can think of already is, if a remote is being very slow, it might
make sense to stop a transfer from it and switch to using a different
remote. Another is that there could be a hotkey to skip the current
transfer, moving on to the next file.
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