Configuration Management Database (CMDB)
A database used to store configuration records throughout their lifecycle. The CMDB maintains the relationships between configuration items (CIs).
Impact
A trusted CMDB enables impact analysis ("If I restart this server, what services go down?") and rapid root cause analysis during incidents.
Weinto take
The traditional monolithic CMDB is dead. It is always out of date. We believe Git is the Source of Truth. The actual state of the infrastructure (what's running in AWS/Azure) should be a projection of what is in Git. If you need a relational view, query the cloud provider's API directly, don't build a shadow database that requires manual feeding.