[hmottestad]

Does SQS guarantee delivery to all clients? If it does then that’s doing a lot of heavy lifting for you.

If it doesn’t guarantee delivery, then I believe you will at some point have a client that reads a cached value thinking it’s still valid because the invalidation message got lost in the network.

[maccard]

Eventually. The problem is that eventually delivering that message will result in clients assuming that it will always be the same, when it’s not.