Paper Info
Title
Data layout for power efficient archival storage systems
Abstract
Legacy archival workloads have a typical write-once-read-never pattern, which fits well for tape based archival systems. With the emergence of newer applications like Facebook, Yahoo! Flickr, Apple iTunes, demand for a new class of archives has risen, where archived data continues to get accessed, albeit at lesser frequency and relaxed latency requirements. We call these types of archival storage systems as active archives. However, keeping archived data on always spinning storage media to fulfill occasional read requests is not practical due to significant power costs. Using spin-down disks, having better latency characteristics as compared to tapes, for active archives can save significant power. In this paper, we present a two-tier architecture for active archives comprising of online and offline disks, and provide an access-aware intelligent data layout mechanism to bring power efficiency. We validate the proposed mechanism with real-world archival traces. Our results indicate that the proposed clustering and optimized data layout algorithms save upto 78% power over random placement.
Year
DOI
Venue
2015
10.1145/2818613.2818742
HotPower@SOSP
Field
DocType
Citations 
Electrical efficiency,Architecture,Data layout,Scheduling (computing),Latency (engineering),Online and offline,Engineering,Cluster analysis,Blade server,Operating system
Conference
2
PageRank 
References 
Authors
0.37
11
4
Name
Order
Citations
PageRank
Ramana Reddy120.37
Atish Kathpal2131.63
Jayanta Basak337232.68
Randy H. Katz4168193018.89