The last decade has seen tremendous developments in memory and storage technologies, starting with Flash Memory and continuing with the upcoming Storage-Class Memories. Combined with an explosion of data processing, data analytics, and machine learning, this led to a segmentation of the memory and storage market. Consequently, the traditional storage hierarchy, as we know it today, might be replaced by a multitude of storage hierarchies, with potentially different depths, each tailored for speciﬁc workloads. In this context, we explore in this “Kurz Erklärt” the state of memory technologies and reﬂect on their future use with a focus on data management systems. Keywords Storage · Main Memory · Flash · SSD · DRAM · Storage-Class Memory · Non-Volatile Memory 1Introduction be bound by memory bandwidth, by memory latency, or by energy consumption. In a real world scenario, a data- The traditional storage hierarchy comprises several layers intensive application will be constrained by a combination of memory technologies, ordered from the fastest and least of the three. This disparity in bandwidth, latency, and en- dense to the slowest and densest: CPU caches (SRAM), ergy consumption constraints led hardware manufacturers main memory (DRAM), secondary memory (HDD), and to segment the market of
Datenbank-Spektrum – Springer Journals
Published: Jun 4, 2018
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