Appendix Restarting Aspera Services When you change product settings, you might need to restart certain Aspera services in order for the new values to take effect. Docroot vs. File Restriction A transfer user's access to the server's file system can be restricted by configuring a docroot or a file restriction. Though similar, certain Aspera features require that the transfer user have a file restriction rather than a docroot. Aspera Ecosystem Security Best Practices Testing and Optimizing Transfer Performance To verify that your system's FASP transfer is reaching the target rate and can use the maximum bandwidth capacity, prepare a client to connect to an Aspera server. For these tests, you can transfer an existing file or file set, or you can transfer uninitialized data in place of a source file, which you can destroy at the destination, eliminating the need to read from or write to disk and saving disk space. aclean Reference The Aspera aclean command-line tool is a fast method of deleting directories and files from local and object storage. Directories and files can be filtered based on their last modified times. For Windows operating systems, the created time (CTIME) and modified time (MTIME) are used as the matching criteria. You can do a dry run of an aclean command to test what content will be deleted. aclean can be run on any platform on which Ascp 4 is supported. Create an SSL Certificate (Apache) You can generate an RSA Private Key, Certificate Signing Request (CSR), and optional self-signed certificate by using OpenSSL. For your organization's internal or testing purposes, Aspera provides the PEM files aspera_server_cert.pem and aspera_server_key.pem, which are in the following directory: Enable SSL (Apache) Install and enable an SSL certificate for your HST Server Web UI. Log Files The application log file includes detailed transfer information and can be useful for review and support requests. You can configure log rotation and redirect Aspera logging so that it is not recorded in the system log file. Preserving IBM Spectrum Scale ACLs of Transferred Files Ascp and Aspera Sync can preserve NFSv4 and POSIX ACLs and immutability attributes when transferring files from an IBM Spectrum Scale (formerly GPFS) cluster to another cluster. Connecting to IBM Aspera Shares from the GUI As of IBM Aspera Shares version 1.9.3, the client must have version 3.6.0 or later of HST Server, HST Endpoint, or Desktop Client installed in order to access Shares on a server with version 3.6.0 or later of HST Server, HST Endpoint, or Desktop Client installed. Product Limitations Describes any limitations that currently exist for Aspera transfer server and client products.