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SUMMARY:Soroban: Attributing latency in virtualized environments - Lucian 
 Carata (University of Cambridge)
DTSTART:20150630T130500Z
DTEND:20150630T135500Z
UID:TALK59967@talks.cam.ac.uk
CONTACT:Andrew Rice
DESCRIPTION:Applications executing in virtualized environments experience 
 a lack of performance isolation from other services executing on shared re
 sources. Latency sensitive applications running in the cloud are therefore
  sometimes affected by highly-variable response times\, yet understanding 
 the causes of such variations at the level of individual requests is an un
 solved problem.\n\nWe present Soroban\, a framework for attributing latenc
 y to either the cloud provider or their customer. Soroban allows developer
 s to instrument applications\, such as web servers to determine\, for each
  request\, how much of the latency is due to the cloud provider\, and how 
 much is due to the consumer’s application or service. With this support 
 Soroban enables cloud-providers to provision based on acceptable-latencies
 \, adopt fine-grained charging levels that reflect latency demands of user
 s and attribute performance anomalies to either the cloud provider or thei
 r consumer. We apply Soroban to a HTTP server and show that it identifies 
 when the cause of latency is due to a provider-induced activity\, such as 
 underprovisioning a host\, or due to the software run by the customer.\n\n
 For more details\, please visit https://www.cl.cam.ac.uk/research/dtg/rscf
 l/soroban.html\n\nThis is a practice talk for HotCloud'15\n
LOCATION:SS03\, William Gates Building
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