When reviewing a GBase Database(GBase 8a) cluster installation, I once saw three host lists that looked like unrelated inventories: three scheduling nodes, four data nodes, and three GCware nodes.

The problem wasn't necessarily the number of machines. It was the assumption that each list represented a completely separate group of servers.

With GBase Database(GBase 8a MPP Cluster), the first step in a cluster deployment should be to map the node roles before running the installer.

1. Understand the Three Host Lists in demo.options

The host lists in demo.options describe different cluster roles.…