Introduction to Ascp 4
Ascp 4 is a FASP transfer binary that is optimized for sending extremely large sets of individual files. The executable, ascp4, is similar to ascp and shares many of the same options and capabilities, in addition to data streaming capabilities.
Both Ascp 4 and Ascp are automatically installed with IBM Aspera High-Speed Transfer Server, IBM Aspera High-Speed Transfer Endpoint, and IBM Aspera Desktop Client.
As installed, Ascp is used for transfers started from the GUI and Ascp 4 transfers can only be initiated from the command line. For information on how to make GUI-initiated transfers use Ascp 4, see Using Ascp 4 from the GUI.
Ascp 4 Streaming Transfers
Ascp 4 can be used for high-speed data stream transfers. For more information, see Data Streaming Command Syntax.
HST Server and HST Endpoint licenses prohibit users from streaming video or media. A separate product, IBM Aspera Streaming for Video, is available for video streaming. For more information, see the IBM Aspera Streaming for Video User Guide.
Required Configuration for Multicast-to-Multicast Streaming
The transfer user who authenticates the data multicast stream transfer must have no docroot configured in aspera.conf. A file restriction can be set instead to restrict access.
Run the following command to unset a docroot and set a file restriction:
# asconfigurator -x "set_user_data;user_name,username;absolute,AS_NULL;file_restriction,|restriction"The restriction can be set to allow all access (*) or limited by protocol, hostname or path:
| Restriction | Format Example |
|---|---|
| By protocol | udp://* tcp://* |
| By protocol and hostname | udp://hostname* |
| By protocol, hostname, and port | tcp://hostname:5000* |