Post by raselbd114 on Dec 5, 2023 8:51:56 GMT
Kimball's approach unlike Inmon's assumes strong involvement of end users from the very beginning of creating a wholesale store. One version of Linstedt's facts Data Vault Unlike Inmon's view of data Linstedt assumes that all available data for the entire period should be loaded into the warehouse. This is what is known as a one fact story approach. As in the case of Kimball's star schema in the case of Data Vault Linstedt introduces some additional objects to organize the structure of the data warehouse. These objects are referred to as: hub satellite and link. Data Vault Linstedt data warehouse architecture Fig. Data Vault architecture diagram according.
Linstedt Hubs are objects that contain a unique list of business keys from source systems. Additionally the hub stores metadata regarding the date and time of the first appearance of a given key and its source. The Hub does not contain descriptive or factual data. Links Email Marketing List in turn allow you to define relationships between hubs. They are similar to fact tables in multidimensional modeling. Satellites contain descriptive data resembling dimensions known from multidimensional modeling and can only connect to hubs or links. An example of a hub may be a unique customer identifier in the sales system; the link will be a single sales line and the satellite will be customer data for shipping.
Linstedt architecture diagram data warehouse architecture Fig. Data warehouse architecture diagram according to Linstedt For optimization purposes in Data Vault. instead of primary keys coming directly from the source systems usually integers they are transformed using the socalled hash function e.g. MD or the more secure SHA. Additionally thanks to this approach it is possible to implement Data Vault on Hadoop. Another innovation of Data Vault. is the use of the socalled Hash Diff for efficiently comparing data already loaded with data waiting to be loaded in the next feed.
Linstedt Hubs are objects that contain a unique list of business keys from source systems. Additionally the hub stores metadata regarding the date and time of the first appearance of a given key and its source. The Hub does not contain descriptive or factual data. Links Email Marketing List in turn allow you to define relationships between hubs. They are similar to fact tables in multidimensional modeling. Satellites contain descriptive data resembling dimensions known from multidimensional modeling and can only connect to hubs or links. An example of a hub may be a unique customer identifier in the sales system; the link will be a single sales line and the satellite will be customer data for shipping.
Linstedt architecture diagram data warehouse architecture Fig. Data warehouse architecture diagram according to Linstedt For optimization purposes in Data Vault. instead of primary keys coming directly from the source systems usually integers they are transformed using the socalled hash function e.g. MD or the more secure SHA. Additionally thanks to this approach it is possible to implement Data Vault on Hadoop. Another innovation of Data Vault. is the use of the socalled Hash Diff for efficiently comparing data already loaded with data waiting to be loaded in the next feed.