Each Distribution Server has a couple of tuneable parameters. These can be accessed by selecting the Distribution Server from Hosts → View hosts and then selecting the tab Distribution Server Settings. The settings are described below.
- Cache size
The maximum cache size of the Distribution Server. Each Distribution Server caches the transferred files (installation packages) in
/var/opt/ssh-mgmt/dist-cache. When the total amount of cached files rises over this limit, the least recently accessed files are deleted to reduce the cache size under the limit. This is not a hard limit: if all files are in use (accessed during the last minute), they are not deleted. If files accessed during the last hour are deleted, the Distribution Server logs a message recommending increasing the cache size.
Minimum setting for this parameter is 0, which effectively disables the caching. To avoid filling the disk in the Distribution Server, it should not be set higher than the available disk space on the Distribution Server.
- Downlink bandwidth limit
To avoid saturating the network, each Distribution Server has a setting to limit the total bandwidth of downstream file transfers. The setting is in bytes per second.
The limit should be set above zero. The default of 100 million bytes per second is the recommended maximum value.
The settings can be changed using the Edit button. The settings are not taken into use before the Distribution Server is deployed by pressing Hosts → Deploy Server Hierarchy → Deploy now.