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This project targets on using automatic techniques to reduce MTTR of large-scale online service systems.
Project details
Labs: Asia
MODIST is a practical software model checker for unmodified concurrent, distributed and cloud systems. MODIST explores different execution paths systematically as well as simulating a variety of environment faults to discover subtle corner-case defects. We have applied MODIST in Oracle Berkely DB, MPS(Paxos implementation), SQL Azure, Windows Azure Storage and other real systems, and found many new bugs.
Project details
Labs: Asia
Project details
Labs: Cambridge
This project re-imagines and re-engineers wide area networks, to more than double their efficiency and allow flexible sharing of resources.
Project details
Labs: Redmond
Crowded: Digital Piecework and the Politics of Platform Responsibility in Precarious Times looks as crowdsourcing as a focal point for many of the issues that are raised by the structure of our current information economy: economic value, cultural meaning, and ethics.
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Project details
Labs: Redmond
Buildings have a tremendous impact on our society, resource footprint, environment and health. In the past few years, there have been significant advances in gaining visibility into buildings’ daily operations. As human activities and comfort impact how buildings operate, we argue that the next step is Human-Building Analytics (HBA). Specifically, HBA aims for analytics to be easier and more personalized to individual occupants, and buildings to be more adaptive to occupants’ behavior.
Project details
Labs: Asia
Project details
Labs: Asia
Waypoint project is up and running in Building 99.
Project details
Labs: Redmond
As PHY layer data rates increase, CSMA MAC overheads dominate. The 9 us slot width at 1Gbps data rate can result in MAC efficiency of under 10%. WiFi-Nano proposes a novel speculative transmission based technique that leverages self-interference cancelation and allows for using 800ns slots -- reducing CSMA overheads by an order of magnitude.
Project details
Labs: Cambridge | India
The quest for higher data rates in WiFi is leading to the development of standards that make use of wide channels (e.g., 40MHz in 802.11n and 80MHz in 802.11ac). We argue against this trend of using wider channels, and instead advocate that radios should communicate concurrently over multiple narrow channels for efficient and fair spectrum utilization. We propose WiFi-NC, a novel PHY-MAC design that allows radios to use WiFi over multiple narrow channels simultaneously.
Project details
Labs: Cambridge | India
Dhwani enables information theoretically secure Near Field Communication (NFC) on existing mobile phones without requiring any special hardware or PKI infrastructure. It uses existing microphones and speakers on phones to perform acoustic NFC.
Project details
Labs: India
The LKW project is aimed at designing low-power algorithms and systems for admission control to speech systems: i.e., detecting foreground speech, recognizing leading keywords and verifying speakers on a continuously-on wearable device. Our goal is to consume under 10 mW average on generic embedded hardware available today and under 100uW on custom hardware.
Project details
Labs: Redmond
In data centers, the IO path to storage is long and complex. It comprises many layers or “stages” with opaque interfaces between them. This makes it hard to enforce end-to-end policies that dictate a storage IO flow’s performance (e.g., guarantee a tenant’s IO bandwidth) and routing (e.g., route an untrusted VM’s traffic through a sanitization middlebox). We are researching architectures that decouple control from data flow to enable such policies.
Project details
Labs: Cambridge
The Scalable Hyperlink Store is a specialized "database" for the web graph. SHS maintains the web graph in main memory, distributed over many machines. The system is available as C# source code as well as precompiled binaries.
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A framework to reason about weaker forms of consistency and isolation in a replicated database.
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Energy drain in mobile devices is well recognized to be a serious problem. One solution is to provide tools and guidelines to enable application writers build more energy efficient programs. This project explores an alternative that mitigates the ill-effects of an energy hungry application. Our system, E-Loupe, offers a finer-grained approach to ensure predictable energy drain in mobile devices.
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Vision is the ultimate source of sensory input that we humans consume. We believe that the next generation of computers will provide the ability to continuously capture and analyze visual information in real-time, thus greatly enhancing the overall experience and efficiency of their users.
Project details
Labs: Redmond
Column store technology can provide very substantial performance improvements on data warehousing workloads. This project investigated how to integrate columnar storage into SQL Server. The solution adopted was to add a new index type, columnstore index, that stores data column wise instead of row wise. Columnstore indexes first shipped in SQL Server 2012 and significant enhancements will be included in the next release.
Project details
Labs: Redmond
This research project in MSR SVC aims to answer the following question: Can we allow programmers to write cloud applications as though they are accessing centralized, strongly consistent data while at the same time allowing them to specify their consistency/availability/performance (CAP) requirements in terms of service-level agreements (SLAs) that are enforced by the cloud storage system at runtime?
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The XCG Lab Security and Cryptography teams do development, applied research, and theoretical research in the fields of systems security and cryptography. These teams include the Cryptography Research team, the Security & Cryptography team, and the Systems Incubation team.
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Optimus is a framework for dynamically rewriting an execution plan graph in distributed data-parallel computing at runtime. It enables optimizations that require knowledge of the semantics of the computation, such as language customizations for domain-specific computations including matrix algebra. We address several problems arising in distributed execution including data skew, dynamic data re-partitioning, unbounded iterative computations, and fault tolerance.
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Real-time information about businesses such as, the current occupancy and music levels, as well as the type or exact song playing now, can be important factors in the local search decision process. In this work, we propose to automatically crowdsource such rich, real time business metadata through user check-in events.
Project details
Labs: Redmond
Project details
Labs: Redmond
The goal of the Physical Analytics project, or Phytics, is to perform analytics on the physical actions of users.
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Labs: India
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