4 ms·
Can you explain how this is useful? It seems like the destination is the important thing here not the source.
by ryanworl 5y ago
Can you explain how this is useful? It seems like the destination is the important thing here not the source.
- ithkuil 5y agoit can be useful for some coordination problems. for example imagine that you have N writers and you want only the first of them to write something in a n object. each writer writes their content into "_foo" and each tries to copy that to "foo", with "x-amz-copy-source-if-match". Only one of them will succeed and "foo" will have one consistent value, which all observers (including other writers) can agree who has won.