Working with the Recon web user interface

Recon is a centralized monitoring and management service within an Ozone cluster that provides information about the metadata maintained by different Ozone components such as the Ozone Manager (OM) and the Storage Container Manager (SCM).

Recon keeps track of the metadata as the cluster is operational, and displays the relevant information through a dashboard and different views on the Recon web user interface. This information helps in understanding the overall state of the Ozone cluster.

The metadata that components such as OM and SCM maintain are quite different from one another. For example, OM maintains the mapping between keys and containers in an Ozone cluster while SCM maintains information about containers, DataNodes, and pipelines. The Recon web user interface provides a consolidated view of all these elements.