This paper is concerned with online caching algorithms for the (n,k)-companion cache, defined by Brehob et al. (J. Scheduling 6 (2003) 149). In this model the cache is composed of two components: a k-way set-associative cache and a companion fully associative cache of size n. We show that the deterministic competitive ratio for this problem is (n+1)(k+1)-1, and the randomized competitive ratio is O(lognlogk) and Ω(logn+logk).
Bibliographical noteFunding Information:
Preliminary version of this paper appeared in . ∗Corresponding author. E-mail address: firstname.lastname@example.org (M. Mendel). 1The 'rst named author would like to dedicate this paper in memory of Steven Seiden. 2Partially supported by the Louisiana Board of Regents Research Competitiveness Subprogram
- Online algorithms