Object storage looks enough like a filesystem that people reach for it the same way — and then get surprised by eventual consistency, by listing costs, and by the fact that renaming a prefix is a full copy.
We go through the three failure patterns we see most often in support tickets, with the fix for each. None of them are exotic. All of them cost somebody a weekend.
If you take one thing away: stop listing a bucket to find a file. Keep the index somewhere that is actually an index.
