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+I often "copy --to remote" many files at once, and inevitably the transfer fails for some files (few out of hundreds). It would be great to subsequently be able to "copy --failed --to remote" to re-try only the transfers for failed files (similarly to how one can use "--unused").
+
+Related: <https://git-annex.branchable.com/todo/make_copy_--fast__faster/>
+
+git-annex is awesome btw. Thanks!