ODS(Operational Data Sources)

Its a replica of OLTP system and so the need of this, is to reduce the burden on production system (OLTP) while fetching data for loading targets. Hence its a mandate Requirement for every Warehouse.

So every day do we transfer data to ODS from OLTP to keep it up to date?

OLTP is a sensitive database they should not allow multiple select statements it may impact the performance as well as if something goes wrong while fetching data from OLTP to data warehouse it will directly impact the business.

ODS is the replication of OLTP.

ODS is usually getting refreshed through some oracle jobs.

enables management to gain a consistent picture of the business.