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A survey of techniques for architecting SLC/MLC/TLC hybrid Flash memory–based SSDs
Author(s) -
Alsalibi Ahmed Izzat,
Mittal Sparsh,
AlBetar Mohammed Azmi,
Sumari Putra Bin
Publication year - 2018
Publication title -
concurrency and computation: practice and experience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 67
eISSN - 1532-0634
pISSN - 1532-0626
DOI - 10.1002/cpe.4420
Subject(s) - computer science , flash (photography) , garbage collection , flash memory , spark (programming language) , computer hardware , embedded system , flash file system , flash memory emulator , operating system , computer memory , semiconductor memory , garbage , art , visual arts , programming language
Summary Flash memory–based solid‐state drives (SSDs) offer several attractive features and benefits compared to hard disk drive (HDD), such as shock resistance and better performance especially for random data access. Depending on the number of bits in each cell, Flash memory can be designed as single/multi/triple level cell (SLC/MLC/TLC), which have different performance, density, cost and write endurance characteristics. To bring the best of these together, several researchers have proposed designing SSD using hybrid SLC/MLC/TLC Flash memory. However, these SSDs also present several challenges such as buffer management, placement of hot/cold data in suitable portion, and intelligent garbage collection. Several recent techniques aim to address these challenges. In this paper, we present a survey of techniques for managing SSDs designed with SLC/MLC/TLC Flash memory. We classify the works on several axes to bring out their similarities and differences. We aim to synthesize the state‐of‐art progress in hybrid SSD management and also spark further research in this area.