Network coded storage with multi-resolution codes
Ulric J. Ferner, Tong Wang, Muriel Médard · 2013
From a user perspective in modern data centers, temporary data unavailability dominates permanent data unavailability. Complementing data center repair research, this paper focuses on this temporary unavailability. To help manage this traffic-induced unavailability, we propose a coded resolution-aware storage (CRS) scheme for data center video-streaming applications. In particular, files stored on drives are pre-network coded across multi-resolution (MR) layers. We explore the characteristics of this concept and compare it to an uncoded resolution-aware storage (URS) scheme, as well as to classic storage systems. We illustrate that the CRS scheme can in some cases provide an order of magnitude in saturation probability gains over URS and classic systems.