ascp4: Transferring from the command line Ascp4 is a FASP® transfer binary similar to ascp but it has different strengths as well as capabilities that are unavailable with Ascp. Introduction to ascp4Ascp4 is a FASP transfer binary that is optimized for sending 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.Ascp4 command referenceSupported environment variables, the general syntax, and command options for ascp4 are described in the following sections. ascp4 exits with a 0 on success or a 1 on error. The error code is logged in the ascp4 log file.Ascp4 transfers with object storageFiles that are transferred with object storage are sent in chunks through the Aspera® Trapd service. By default, ascp4 uses 64 KB chunks and Trapd uses 1 MB chunks; this mismatch in chunk size can cause ascp4 transfers to fail.Ascp4 examplesThe command options for ascp4 are generally similar to those for ascp. The following examples demonstrate options that are unique to Ascp4. These options enable reading management commands and enable read/write concurrency.Built-in I/O providerInput/output provider are library modules that abstract I/O scheme in Ascp4 architecture. Ascp4 has the following built-in I/O provider:Parent topic: Desktop Client Guide for Linux