![]() ![]() A surrogate key is how the business identifies an object if no direct business key is available. Hubs also contain a surrogate key for each Hub item. Business keys have a low chance to change.Ī Hub may represent any important business entity within an organization such as a product, store, or a customer. These business keys are keys or codes which the business uses to identify one record. HubsĪ Data Vault Hub contains a list of unique business keys. Hash keys do not only speed up the loading process they also ensure that the enterprise data warehouse can span across multiple environments: on-premise databases, Hadoop clusters and cloud storage. These hash keys are mandatory because of the many advantages. The additional 2 tables (PIT and Bridge) were introduced with Data Vault 2.0.Īnother big change in Data Vault 2.0 is the introduction of hash keys in the model. The original Data Vault spec had only 3 of them (Hubs, Sats and Links). There are 5 different types of tables in the Data Vault model. What are Hubs, Sats and Links in Data Vault? A business vault and information marts need to be created in order to provide value to the business When data is ingested into Data Vault, it may not be instantly user ready.A large storage may be needed to maintain a full history of data. ![]() Data vault Models can be more complicated/complex.Data Vault is a structured solution hence teams need proper training for Data Vault implementation.Allows for data loads with a high degree of parallelism. ![]()
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