Is Google Cloud Storage object composition strongly consistent?

Google Cloud Storage supports S3-compatible multipart uploads and mentions that "[it] can take several minutes to process a request to complete a multipart upload". Does the same apply to the compose operation of the JSON API? Is it guaranteed that after composing an object with the JSON API, it will become immediately available for reading and listing it?


  • Once a Compose operation completes the resulting object is immediately readable and list-able.