Paper Info
Title
KnightShift: shifting the I/O burden in datacenters to management processor for energy efficiency
Abstract
Data center energy costs are growing concern. Many datacenters use direct-attached-storage architecture where data is distributed across disks attached to several servers. In this organization even if a server is not utilized it can not be turned off since each server carries a fraction of the permanent state needed to complete a request. Operating servers at low utilization is very inefficient due to the lack of energy proportionality. In this research we propose to use out-of-band management processor, typically used for remotely managing a server, to satisfy I/O requests from a remote server. By handling requests with limited processing needs, the management processor takes the load off the primary server thereby allowing the primary server to sleep when not actively being used; we call this approach KnightShift. We describe how existing management processors can be modified to handle KnightShift responsibility. We use several production datacenter traces to evaluate the energy impact of KnightShift and show that energy consumption can be reduced by 2.6X by allowing management processors to handle only those requests that demand less than 5% of the primary CPU utilization.
Year
DOI
Venue
2010
10.1007/978-3-642-24322-6_16
ISCA Workshops
Keywords
Field
DocType
energy impact,knightshift responsibility,management processor,energy consumption,energy proportionality,data center energy cost,remote server,primary server,out-of-band management processor,existing management processor,energy efficiency,o burden,deterministic finite automaton
Server farm,CPU time,Efficient energy use,Deterministic finite automaton,Computer science,Server,Parallel computing,Real-time computing,Input/output,Energy consumption,Data center,Operating system
Conference
Citations 
PageRank 
References 
2
0.38
6
Authors
3
Name
Order
Citations
PageRank
Sabyasachi Ghosh151.12
Mark Redekopp220.38
Murali Annavaram31685113.77