taskMode

Specifies one of the following task modes for your data transfer:

ENHANCED - Transfer virtually unlimited numbers of objects with higher performance than Basic mode. Enhanced mode tasks optimize the data transfer process by listing, preparing, transferring, and verifying data in parallel. Enhanced mode is currently available for transfers between Amazon S3 locations, transfers between Azure Blob and Amazon S3 without an agent, and transfers between other clouds and Amazon S3 without an agent.To create an Enhanced mode task, the IAM role that you use to call the CreateTask operation must have the iam:CreateServiceLinkedRole permission.
BASIC (default) - Transfer files or objects between Amazon Web Services storage and all other supported DataSync locations. Basic mode tasks are subject to quotas on the number of files, objects, and directories in a dataset. Basic mode sequentially prepares, transfers, and verifies data, making it slower than Enhanced mode for most workloads.