The

Administrator Daemon

is a process that collects statistics and state information from all EDS Nodes, aggregates the information, and sends them to the Administrator tool. The

Administrator Daemon

sends EDS Node configuration and EDS license details to Apache ZooKeeper. The

Administrator Daemon

runs an HTTP server. The

EDS Node

s use the HTTP server to fetch configuration and libraries from the Administrator Daemon. The database stores configuration details.

The

Administrator Daemon

installation process also installs the UM Topic Resolution Daemon (LBMRD) and a persistent store. The persistent store provides storage to message streams.

A

EDS Node

is a Java program within which source services and target services exist. You can run multiple source services and target services on a single

EDS Node

. Source services collect data from data sources and publish the data. Target services receive and write that data to a data target.

You install

EDS Node

s on all the hosts on which you want to run source services or target services. The

EDS Node

s download plugins from the

Administrator Daemon

, and the configuration from Apache ZooKeeper.

Apache ZooKeeper is a centralized service that maintains the configuration information of the

EDS Node

s in a deployment. You can deploy ZooKeeper as a standalone instance or, for reliability, as a cluster called a ZooKeeper ensemble. When you start a

EDS Node

, it fetches its configuration information from ZooKeeper.