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Oktay Ölmez

dblp:346/1196 · DBLP profile ↗
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3ranked-venue papers
1as first author
0since 2021 · last 2018
0000-0002-9130-0038ORCID · corroborated

Domains — the database's venue-derived domains; a paper can count in several

Security and privacy · 2Theory of computation · 1 · 1 first-author

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Computer architecture, parallel and distributed computing, and storage systems
1 paper
Storage systems · 50% Distributed systems · 50%
Theoretical computer science
1 paper
Coding theory · 100%

Topics — the 4 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Storage systems
distributed storage
0.212016
Fractional Repetition Codes With Flexible Repair From Combinatorial Designs · IEEE Trans. Inf. Theory 2016
Distributed systems
fault tolerance
0.212016
Fractional Repetition Codes With Flexible Repair From Combinatorial Designs · IEEE Trans. Inf. Theory 2016
Coding theory › distributed storage › distributed storage codes
fractional repetition codes
0.212016
Fractional Repetition Codes With Flexible Repair From Combinatorial Designs · IEEE Trans. Inf. Theory 2016
Coding theory › distributed storage › distributed storage codes
regenerating codes
0.212016
Fractional Repetition Codes With Flexible Repair From Combinatorial Designs · IEEE Trans. Inf. Theory 2016

Methods — techniques the papers use, named apart from their topics

latin squares · 0.5kronecker product · 0.5hadamard designs · 0.5steiner systems · 0.2steiner system · 0.2affine geometry · 0.2affine geometries · 0.2
YearPublicationVenuePosition
2018 A framework for constructing partial geometric difference sets
James A. Davis, Oktay Ölmez
Des. Codes Cryptogr.2
2016 Partial geometric designs with prescribed automorphisms
Kathleen Nowak, Oktay Ölmez
Des. Codes Cryptogr.2
2016 Fractional Repetition Codes With Flexible Repair From Combinatorial Designs
abstract
Fractional repetition (FR) codes are a class of regenerating codes for distributed storage systems with an exact (table-based) repair process that is also uncoded, i.e., upon failure, a node is regenerated by simply downloading packets from the surviving nodes. In this paper, we present the constructions of FR codes based on Steiner systems and resolvable combinatorial designs, such as affine geometries, Hadamard designs, and mutually orthogonal Latin squares. The failure resilience of our codes can be varied in a simple manner. We construct codes with normalized repair bandwidth (β) strictly larger than one; these cannot be obtained trivially from codes with β = 1. Furthermore, we present the Kronecker product technique for generating new codes from existing ones and elaborate on their properties. FR codes with locality are those where the repair degree is smaller than the number of nodes contacted for reconstructing the stored file. For these codes, we establish a tradeoff between the local repair property and the failure resilience and construct codes that meet this tradeoff. Much of prior work only provided lower bounds on the FR code rate. In this paper, for most of our constructions, we determine the code rate for certain parameter ranges.
Oktay Ölmez, Aditya Ramamoorthy
IEEE Trans. Inf. Theory1