clientRequestToken

An idempotency token for resource creation, in a string of up to 63 ASCII characters. This token is automatically filled on your behalf when you use the Command Line Interface (CLI) or an Amazon Web Services SDK.

By using the idempotent operation, you can retry a CreateFileCache operation without the risk of creating an extra cache. This approach can be useful when an initial call fails in a way that makes it unclear whether a cache was created. Examples are if a transport level timeout occurred, or your connection was reset. If you use the same client request token and the initial call created a cache, the client receives success as long as the parameters are the same.