STENG, clusters and servers

The STENG (Scalable Trusted Engine) is the execution agent of Data One. It performs executive tasks orchestrated by the CEMAN, such as file transfers, data compression, and data encryption. Among its activities, it can act as a server for users to upload and download files, or as a client to push and pull files from remote servers.

A STENG cluster is a group of cooperative STENG peers. Having a cluster ensures high availability and enables tasks to be executed in parallel.

Navigate to Setup → STENG, Clusters, and Servers to view all clusters in the system, the STENGs associated with each cluster, and all servers in each STENG.

The General Statistics card on the right displays the count of Clusters, STENGs, and Servers. It also provides the number of active Servers and STENGs out of the total.

In the figure above, three clusters are linked to the STENG. If a cluster's box is grey, its status is unknown.

When you select a server, a card appears in the top-right corner displaying its details. The card indicates whether the server is running and includes two buttons to start or stop the server as needed.

The Stop action stops the STENG at function level but the JVM remains active.

To see the full list of Servers in a separate window, you can click the View All button.

Clusters, CEMAN and STENG must always be odd and must be at least 3 (each).

When you delete a STENG, all the servers configured on that STENG will be deleted as well without further notice!