Collection Management

**Table 1** Basic concepts of collection management
Terminology	Description
UniAgent	UniAgent manages the life cycle of plug-ins centrally and deliver instructions for operations such as script delivery or execution. It does not collect O&M data; instead, different plug-ins do so. Install, upgrade, and uninstall these plug-ins as required. More plug-ins (such as Cloud Eye and Host Security Service (HSS)) are coming soon.
AK/SK	Access key. You can install ICAgents using tenant-level AK/SK for easy log collection.
ICAgent	ICAgents collect metrics, logs, and application performance data. For the hosts created on the ECS or BMS console, manually install ICAgents. For the hosts that are created through CCE, ICAgents are automatically installed.
Installation host	You can deliver UniAgent installation instructions to hosts in batches through an installation host on AOM. After setting an installation host, you can remotely install UniAgents on other hosts in the same VPC.
Proxy area/Proxy	To enable network communication between multiple clouds, create and configure an ECS as a proxy and bind an EIP to it. AOM delivers deployment and control instructions to remote hosts and receives O&M data through the proxy. A proxy area contains multiple proxies for high availability.