BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:End-to-End Performance Isolation through Virtual Datacenters - Hit
 esh Ballani (MSR Cambridge)
DTSTART:20141030T150000Z
DTEND:20141030T160000Z
UID:TALK54118@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:The lack of performance isolation in multi-tenant datacenters 
 at appliances like middleboxes and storage servers results in volatile app
 lication performance. To insulate tenants\, we propose giving them the abs
 traction of a dedicated virtual datacenter (VDC). VDCs encapsulate end-to-
 end throughput guarantees—specified in a new metric based on virtual req
 uest cost—that hold across distributed appliances and the intervening ne
 twork.\n\nI will present Pulsar\, a system that offers tenants their own V
 DCs. Pulsar comprises a logically centralized controller that uses new mec
 hanisms to estimate tenants’ demands and appliance capacities\, and allo
 cates datacenter resources based on flexible policies. These allocations a
 re enforced at end-host hypervisors through multi-resource token buckets t
 hat ensure tenants with changing workloads cannot affect others. Pulsar’
 s design does not require changes to applications\, guest OSes\, or applia
 nces. I will describe prototype results to show that Pulsar can ensure end
 -to-end performance guarantees while imposing reasonable overheads at the 
 data and control plane.\n
LOCATION:FW26\, Computer Laboratory\, William Gates Builiding
END:VEVENT
END:VCALENDAR