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Service Rate Region: A New Aspect of Coded Distributed System Design.

Authors :
Aktas, Mehmet
Joshi, Gauri
Kadhe, Swanand
Kazemi, Fatemeh
Soljanin, Emina
Source :
IEEE Transactions on Information Theory. Dec2021, Vol. 67 Issue 12, p7940-7963. 24p.
Publication Year :
2021

Abstract

Erasure coding has been recognized as a powerful method to mitigate delays due to slow or straggling nodes in distributed systems. This work shows that erasure coding of data objects can flexibly handle skews in the request rates. Coding can help boost the service rate region, that is, increase the overall volume of data access requests that the system can handle. This paper aims to postulate the service rate region as an important consideration in the design of erasure-coded distributed systems. We highlight several open problems that can be grouped into two broad threads: 1) characterizing the service rate region of a given code and finding the optimal request allocation, and 2) designing the underlying erasure code for a given service rate region. As contributions along the first thread, we find the rate regions of maximum-distance-separable, locally repairable, and simplex codes. We show the effectiveness of hybrid codes that combine replication and erasure coding in terms of code design. We also discover fundamental connections between multi-set batch codes and the problem of maximizing the service rate region. [ABSTRACT FROM AUTHOR]

Subjects

Subjects :
*SYSTEMS design

Details

Language :
English
ISSN :
00189448
Volume :
67
Issue :
12
Database :
Academic Search Index
Journal :
IEEE Transactions on Information Theory
Publication Type :
Academic Journal
Accession number :
153731623
Full Text :
https://doi.org/10.1109/TIT.2021.3117695