OpenStack is open source software for building public and private clouds that provide anInfrastructure as a Service (IaaS) platform. Keystone is an OpenStack subproject that providesidentity services, including user authentication and authorization, for the OpenStack family ofprojects. This article shows how to configure Keystone to use a Lightweight Directory AccessProtocol (LDAP) server as its back end for identity services, instead of the default SQL backend.

关键词：LDAP树；配置；单元测试

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Today’s highly scalable Internet applications are largely bound by speed-of-light communication delays between geographically disparate data centers. This latency is particularly problematic when writing to distributed database systems because waiting for messages to travel halfway around the world is often unacceptable, and maintaining any notion of consistency is exceedingly difficult when using modern asynchronous architectures. We present a novel architecture, based on asynchronous remote method invocation, that achieves interesting consistency guarantees, even when performing write operations asynchronously. An analysis of our implementation demonstrates that this solution can provide an intuitive interface to developers, and doesn’t require any specialized knowledge of databases, SQL (Standard Query Language), or transactions.

关键词：异步远程方法；数据库调用

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Risk and cost must be balanced in the design of semiconductor processing metrology. More speci cally, one needs to balance the cost of operating the metrology tool, and the loss in terms of processing cost and yield due to the limited sampling and the time lapse between the occurrence and the correction of a process fault. In virtual metrology (VM), the real-time data produced by the processing tool (e.g. plasma etching data during isolation trench formation) is used to predict an outcome of the wafer (e.g. critical dimension of the trench) utilizing an empirical model.

关键词：混合计量方案；虚拟计量校准；半导体

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In this article, the authors discuss the use of application programming interfaces (APIs) in IBM smartCloud Enterprise Version 2.2. They provide descriptions and use cases for functionalityintroduced in the 2.2 release and offer a range of API code samples, including examples of Representational State Transfer (REST), cURL, and command-line interface (CLI) commands,as well as PHP and Java code.

关键词：智能云企业；API代码；PHP；JAVA

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This article shows IBM PureFlex System administrators how to use the automationmanager function in Flex System Manager to automate responses to common cloud systemevents. Learn what the automation manager's capabilities are, how to create event automationplans with a GUI wizard, and how to reuse existing automation event plans and modify themprogramatically.

关键词：服务器；虚拟机；电子邮件服务；云计算

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In this report, we present a general framework for a distributed Video-on-Demand content distribution problem by formulating an optimization problem yielding a highly distributed implementation that is highly scalable and resilient to changes in demand. Our solution takes into account several individual node resource constraints including disk space, network link bandwidth, and node-I/O degree bound.

关键词：分布式视频点播；流媒体系统；网络链路带宽；约束程度

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Entanglement is at the heart of quantum mechanics. The nonlocal correlations that can be obtained from space-time separated measurements on an entangled state are a central feature which provably distinguish it from local theories. This dissertation studies entanglement through a computational viewpoint. We develop new insights into the complex nature of entanglement by studying its role in multiplayer games, in which cooperating, but noncommunicating, players interact with a referee in an attempt to win a pre-specified game. On the one hand, the nonlocal correlations that entanglement allows may enable players using it to develop new colluding strategies, defeating previously secure protocols. On the other,the richness of this new resource may also be exploited in order to design new protocols, providing solutions to problems previously deemed impossible. We explore both aspects of this dual nature of entanglement, putting limits on its strength while at the same time showing how it can be put to profit to solve new computational problems.

关键词：游戏；复杂性

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This dissertation provides a complexity-theoretic critique of Myerson's theorem, one of Mechanism Design's crown jewels, for which Myerson was awarded the 2007 Nobel Memorial Prize in Economic Sciences. This theorem gives a remarkably crisp solution to the problem faced by a monopolist wishing to sell a single item to a number of interested, rational bidders, whose valuations for the item are distributed independently according to some given distributions; the monopolist's goal is to design an auction that will maximize her expected revenue, while at the same time incentivizing the bidders to bid their true value for the item. Myerson solves this problem of designing the revenue-maximizing auction, through an elegant transformation of the valuation space, and a reduction to the problem of designing the social welfare-maximizing auction (i.e. allocating the item to the bidder who values it the most).

关键词：拍卖；设计；复杂性

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Large-scale data analytics frameworks are shifting towards shorter task durations and larger degrees of parallelism to provide low latency. However, scheduling highly parallel jobs that complete in hundreds of milliseconds poses a major challenge for cluster schedulers, which will need to place millions of tasks per second on appropriate nodes while offering millisecond-level latency and high availability.We demonstrate that a decentralized, randomized sampling approach provides nearoptimal performance while avoiding the throughput and availability limitations of a centralized design.We implement and deploy our scheduler, Sparrow, on a real cluster and demonstrate that Sparrow performswithin 14%of an ideal scheduler.

关键词：并行工作；调度；大规模数据；分析框架

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With the introduction of IBM InfoSphere? Streams 2.0 and the Streams processing language(SPL), developers gained access to two new collection types: set and map. This article describes these three collection types and how to exploit them as part of a native SPL application. You will also learn how to access collections using a primitive C++ Streams operator.

关键词：InfoSphere Streams 2.0；c++流操作符；流处理语言

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