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26
Xbox Live
"... The convergence of games and online social platforms is an exploding phenomena. The continued success of social games hinges critically on the ability to deliver smooth and highly-interactive experiences to end-users. However, it is extremely challenging to satisfy the stringent performance requirem ..."
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of redundant Forward Error Correction packets to combat data loss. Trace-driven emulation demonstrates that Pangolin reduces the 99.9-percentile latency from more than 4 seconds to about 1 second with negligible overhead. Pangolin pre-computes all optimal actions and requires only simple table look-up during
Tales of the Tail: Hardware, OS, and Application-level Sources of Tail Latency
"... Interactive services often have large-scale parallel implemen-tations. To deliver fast responses, the median and tail laten-cies of a service’s components must be low. In this paper, we explore the hardware, OS, and application-level sources of poor tail latency in high throughput servers executing ..."
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Cited by 1 (0 self)
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eliminate these factors and show that Memcached can achieve a median latency of 11 µs and a 99.9th percentile latency of 32 µs at 80 % utilization on a four-core system. In comparison, a naı̈ve deployment of Memcached at the same utilization on a single-core system has a median latency of 100 µs and a 99.9
C3: Cutting Tail Latency in Cloud Data Stores via Adaptive Replica Selection
"... Achieving predictable performance is critical for many distributed applications, yet difficult to achieve due to many factors that skew the tail of the latency distribu-tion even in well-provisioned systems. In this paper, we present the fundamental challenges involved in design-ing a replica select ..."
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Cited by 3 (1 self)
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, and tail (up to 3 times improvement at the 99.9th percentile) and provides higher system through-put. 1
DeTail: Reducing the Flow Completion Time Tail in Datacenter Networks
- In Proc. of SIGCOMM
, 2012
"... Web applications have now become so sophisticated that rendering a typical page may require hundreds of intra-datacenter flows. At the same time, web sites must meet strict page creation deadlines of 200-300ms to satisfy user demands for interactivity. Long-tailed flow completion times make it chall ..."
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Cited by 66 (3 self)
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through NS-3 based simulation and Click-based implementation demonstrating our ability to consistently reduce the tail across a wide range of workloads. We often achieve reductions of over 50 % in 99.9 th percentile flow completion times.
Perchloroethylenecontaminated drinking water and the risk of breast cancer: additional results from Cape Cod
- Environ Health Perspect 111:167–173
"... In 1998 we published the results of a study suggesting an association between breast cancer and perchloroethylene (PCE; also called tetrachloroethylene) exposure from public drinking water. The present case–control study was undertaken to evaluate this association further. The cases were composed of ..."
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Cited by 24 (16 self)
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exposure levels were above the 75th and 90th percentiles when 0–15 years of latency were considered (adjusted odds ratios, 1.5–1.9 for> 75th percentile, 1.3–2.8 for> 90th percentile). When data from the present and prior studies were combined, small to moderate increases in risk were also seen among
Bobtail: Avoiding Long Tails in the Cloud
"... Highly modular data center applications such as Bing, Facebook, and Amazon’s retail platform are known to be susceptible to long tails in response times. Services such as Amazon’s EC2 have proven attractive platforms for building similar applications. Unfortunately, virtualization used in such platf ..."
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Cited by 23 (2 self)
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-scheduling of CPUbound and latency-sensitive tasks. We leverage these observations in Bobtail, a system that proactively detects and avoids these bad neighboring VMs without significantly penalizing node instantiation. With Bobtail, common communication patterns benefit from reductions of up to 40 % in 99.9th percentile
Tetrachloroethylene-contaminated drinking water in Massachusetts and the risk of colon-rectum, lung, and other cancers. Environ Health Perspect
, 1999
"... We conducted a population-based case-control study to evaluate the relationship between cases of breast cancer and exposure to tetrachloroethylene (PCE) from public drinking water (n=258 cases and 686 controls). Women were exposed to PCE when it leached from the vinyl lining of water distribution pi ..."
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Cited by 14 (2 self)
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.5-4.7 and OR 2.3, 95 % Cl 0.6-8.8 for the 75th percentile, and OR 2.7, 95 % Cl 0.4-15.8 and OR 7.6, 95 % Cl 0.9-161.3 for the 90th percentile). The number of highly exposed women was too small for meaningful analysis when more years of latency were considered. Because firm conclusions from these data are limited
FastLane: Making Short Flows Shorter with Agile Drop Notification
"... Abstract The drive towards richer and more interactive web content places increasingly stringent requirements on datacenter network performance. Applications running atop these networks typically partition an incoming query into multiple subqueries, and generate the final result by aggregating the ..."
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the responses for these subqueries. As a result, a large fraction -as high as 80% -of the network flows in such workloads are short and latency-sensitive. The speed with which existing networks respond to packet drops limits their ability to meet high-percentile flow completion time SLOs. Indirect notifications
Articles Tetrachloroethylene-contaminated Drinking Water in Massachusetts and the Risk of Colon-Rectum, Lung, and Other Cancers
"... We conducted a population-based case-control study to evaluate the relationship between cancer of the colon-rectum (n = 326), lung (n = 252), brain (n = 37), and pancreas (n- 37), and exposure to tetrachiloroethylene (PCE) from public drinking water. Subjects were exposed to PCE when it leached from ..."
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subjects whose exposure level was above the 90th percentile whether or not a latent period was assumed [ORh and 95 % confidence intervals (CIs) 3.7 (1.0-i1.7), 3.3 (0.6-13.4), 6.2 (1.1-31.6), and 19.3 (2.-141.7) for 0, 5, 7, and 9 years of latency, respectively]. The adjusted OhRs for colon-rectum cancer
Windows Azure
"... The datacenter network is shared among untrusted tenants in a public cloud, and hundreds of services in a private cloud. Today we lack fine-grained control over network bandwidth partitioning across tenants. In this paper we present EyeQ, a simple and practical system that provides tenants with band ..."
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implementation at 10Gb/s speeds using unmodified applications and adversarial traffic patterns. Our evaluation demonstrates EyeQ’s promise of predictable network performance isolation. For instance, even with an adversarial tenant with bursty UDP traffic, EyeQ is able to maintain the 99.9th percentile latency
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