An ECS is configured as backend storage for OpenStack Glance. Which type of data will it store?

Which ECS layer provides clustering, health, software and configuration management, as well as upgrade capabilities and alerting?

You are configuring an ECS system to be used for private cloud storage in a Data Domain Cloud Tier environment. You want to enable higher storage efficiency for archival data in the storage pool to support the backup solution.
What is the recommended configuration?

ECS has old data on the disks.
What command should be used to prepare the disks for a new install of the ECS software?

A company has deployed an ECS geo-federated setup. They need to read and write the accessible copy of the object if a temporary site failure occurs.
What must they do during ECS configuration to satisfy this requirement?