دانلود کتاب معماری Apache Iceberg – پلتفرم داده‌های مقیاس پذیر و منبع باز

Apache Iceberg solves a problem that is nearly 50 years old, from a time when computing looked very different from what it does now. There was no internet. There were no laptops. We were just beginning to get a glimpse of what PCs might become. It was hard to know at the time, but the long reign of the mainframe was about to come, if not to an end, at least to a middle. Databases, which used to be centralized, were scattered all over the enterprise. Once computing was cheap enough to put a useful machine on every desktop, it also became economically feasible to put a computer under every desktop. The emerging client–server architecture in the late ’80s and early ’90s took the data that was once centralized in the mainframe, where applications and reporting could share the same data, and scattered it in dozens or hundreds of departmental databases that were physically and logically dispersed throughout complex, global organizations. It was no longer possible to see the state of the increasingly computerized business in one place. Enter Bill Inmon and his groundbreaking 1992 work, Building the Data Warehouse. A new analytics architecture was born to bring order to the beneficial chaos the client– server era had unleashed. Bill saw clearly that data existed in two estates: operational, where applications executed database transactions that reflected the exchange of value between a business and its customers, and analytical, where decision makers tried to divine what all those transactions meant. This was a useful distinction between two kinds of data access with radically different operational characteristics. It was also a tool for reuniting enterprise data. The operational estate had been fragmented by the compelling economics of the client–server paradigm, and the data warehouse, fed by carefully engineered ETL processes, brought the entire state of the business back under a single pane of glass for decision makers to contemplate and act on.