Splits big data processing in two: a speed layer (the hot path) analyses events as they arrive, while a batch layer (the cold path) processes everything accurately but slowly. A serving layer joins up both sets of results.
Read more: Microsoft Learn
In the Ultra Transcenders books
Each book explains Lambda architecture in context, with comparison tables and the common traps.
Terms in this definition
- Hot
The online blob access tier where storing data costs the most but accessing it costs the least.
- PATH
Parent-child hierarchies in DAX rely on this function. For each row it builds one delimited text value listing the IDs of the row's ancestors, top level first and ending with the row's own ID, which PATHITEM, PATHLENGTH and friends can then pick apart.
- Cold
Online access tier for blobs that costs less to store than Cool but more to read, while data stays instantly available.