A scalability server is an optional management-free tier that is used when handling large numbers of agents, usually on remote networks separated by a WAN. It can be seen as a fan out mechanism to optimize network utilization.
A software delivery scalability server has a Software Package Library (called staging library) where software packages can be permanently stored to avoid sending a package over the network every time it is required by the agent. Instead of all the individually managed end systems (agents) communicating directly with a single manager, the load can be shared across multiple scalability servers.
Scalability servers use a file store database as a local repository to store the information required to service the agents. In a minimal scalability server installation, the file database consists of a dictionary of registered agents and the basic inventory reported by these.
A scalability server includes the Boot Server, which is needed for operating system deployment.
Note: With virtual applications, the scalability server also functions as the streaming server for virtual application packages that are streamed to target computers running the Windows operating system. See Registering Virtual Applications and Delivering Virtual Applications for more information.
The operating system environments currently supported by the scalability server are listed in the Certification Matrix available at CA Support.
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