Optimal computer crash performance precaution
2012 (English)In: Discrete Mathematics and Theoretical Computer Science, ISSN 1462-7264, Vol. 14, no 1, 55-68 p.Article in journal (Refereed) Published
For a parallel computer system withmidentical computers, we study optimal performance precaution for one possible computer crash. We want to calculate the cost of crash precaution in the case of no crash. We thus define a tolerance level r meaning that we only tolerate that the completion time of a parallel program after a crash is at most a factor r + 1 larger than if we use optimal allocation on m - 1 computers. This is an r-dependent restriction of the set of allocations of a program. Then, what is the worst-case ratio of the optimal r-dependent completion time in the case of no crash and the unrestricted optimal completion time of the same parallel program? We denote the maximal ratio of completion times f(r, m) - i.e., the ratio for worst-case programs. In the paper we establish upper and lower bounds of the worst-case cost function f(r, m) and characterize worst-case programs.
Place, publisher, year, edition, pages
Maison de l'informatique et des mathematiques discretes , 2012. Vol. 14, no 1, 55-68 p.
Computer crash, Load balancing, Optimization, Parallel computer, Process allocation, Scheduling
Mathematics Computer Science
IdentifiersURN: urn:nbn:se:bth-7056Local ID: oai:bth.se:forskinfoB06EE51C5781B5C7C1257AC90038EBEFOAI: oai:DiVA.org:bth-7056DiVA: diva2:834635
Open Access Journal2012-12-212012-12-032015-06-30Bibliographically approved