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Operational data store (ODS)
An integrated database containing only operational data. This data can come from legacy systems and contains only current and recent data; usually dates up to 60 days old. The ODS is therefore fast and manageable. A data warehouse often contains many years of historical data. This is a separate environment next to the data warehouse, in which current, detailed operational data is stored. Like the data warehouse, this environment is integrated and subject-oriented.