@inproceedings{narayanan2008everest,
author = {Narayanan, Dushyanth and Donnelly, Austin and Thereska, Eno and Elnikety, Sameh and Rowstron, Antony and Rowstron, Ant},
title = {Everest: Scaling down peak loads through I/O off-loading},
booktitle = {Proceedings of 8th USENIX Symposium on Operating Systems Design and Implementation (OSDI '08)},
year = {2008},
month = {December},
abstract = {Bursts in data center workloads are a real problem for storage subsystems. Data volumes can experience peak I/O request rates that are over an order of magnitude higher than average load. This requires significant overprovisioning, and often still results in significant I/O request latency during peaks. In order to address this problem we propose Everest, which allows data written to an overloaded volume to be temporarily off-loaded into a short-term virtual store. Everest creates the short-term store by opportunistically pooling underutilized storagere sources either on a server or across servers within the data center. Writes are temporarily off-loaded from overloaded volumes to lightly loaded volumes, thereby reducing the I/O load on the former. Everest is transparent to and usable by unmodified applications,and does not change the persistence or consistency of the storage system. We evaluate Everest using traces from a production Exchange mail server as well as other benchmarks: our results show a 1.4–70 times reduction in mean response times during peaks},
publisher = {USENIX},
url = {http://approjects.co.za/?big=en-us/research/publication/everest-scaling-down-peak-loads-through-io-off-loading/},
edition = {Proceedings of 8th USENIX Symposium on Operating Systems Design and Implementation (OSDI ’08)},
}