Compression is enabled, on a per-service-class basis, on the Configuration: Service Classes
page. This page has a pull-down menu for each service class, with the following options:
- Disk, meaning that both disk based and memory based compression are enabled. This option should be selected unless you have a specific reason for disabling it.
- Memory, meaning that memory based compression is enabled but disk based compression is not. This setting is rarely used, because the appliance automatically selects memory or disk if both types of compression are enabled.
- Flow-Control Only, which disables compression but enables flow-control acceleration. Select this option for services that are always encrypted, and for the FTP control channel.
- None, meaning that compression and flow-control are both disabled.