The XML file contains relevant information about the database, and the folder contains all the “good stuff”. Inside of this folder, each tabular model creates a folder, appended with. Today while working and playing with it tonight, I think I’ve figured it out.Įach tabular model creates a folder in the data drive that we created and configured during installation, typically located at $InstallLocation/Microsoft SQL Server\MSAS11.TABULAR\OLAP\Data. The data itself may be stored in memory, but the relationships and the structure surely must have some reference files on disk that xVelocity and Tabular can use. In the case of a restart, or memory clearing of some way, how does the tabular model store it’s relationships between everything.
However, to me, 1 major question has bugged me about this from the beginning. The storage engine runs against the data that the xVelocity engine stores in the cache. Just like in multidimensional, the formula engine takes the request, determines the optimal query plan, and then answers the query or requests the data that it needs from the storage engine. The overall query request follows a pattern that can be visually represented using the below diagram:
This, theoretically, is very similar to how queries were answered in multidimensional models. However, it still consists of two main engines to drive and respond to user queries, the formula engine and the storage engine. SSAS Tabular stores data mostly in memory.
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