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    • 1. 发明申请
    • LOAD SHEDDING IN A DATA STREAM MANAGEMENT SYSTEM
    • 数据流管理系统中的负载冲击
    • WO2014094825A1
    • 2014-06-26
    • PCT/EP2012/075955
    • 2012-12-18
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    • MANZANO MACHO, DavidLAFUENTE ALVAREZ, Luis Maria
    • G06F17/30
    • G06F17/30516G06F17/30595G06N99/005
    • A data stream management system, DSMS (110), that receives input data streams (120) from data stream sources and location information associated with the sources and executes a continuous query against data items of the input data streams to generate at least one output data stream (140). The DSMS comprises means (112) to execute a load shedding process when the DSMS is overloaded with data from the input data streams (120) and also includes a learning module (113) that determines, when the DSMS is not overloaded and for the location information associated with the data stream sources, a respective utility value indicating a utility to the DSMS client of data from the data stream sources. The load shedding module (112) identify one or more input data streams whose data items are to be discarded by using location information, together with the location information and data utility values.
    • 数据流管理系统DSMS(110),其从数据流源接收输入数据流(120)和与源相关联的位置信息,并且针对输入数据流的数据项执行连续查询以产生至少一个输出数据 流(140)。 DSMS包括当DSMS由来自输入数据流(120)的数据过载时执行卸载过程的装置(112),并且还包括学习模块(113),该学习模块(113)确定何时DSMS没有超载并且位置 与数据流源相关联的信息,指示来自数据流源的数据对DSMS客户端的效用的相应效用值。 负载脱落模块(112)通过使用位置信息以及位置信息和数据效用值来识别要丢弃其数据项的一个或多个输入数据流。
    • 2. 发明申请
    • OPTIMISED DATA STREAM MANAGEMENT SYSTEM
    • 优化数据流管理系统
    • WO2012152315A1
    • 2012-11-15
    • PCT/EP2011/057492
    • 2011-05-10
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)MANZANO MACHO, DavidPALLARES LOPEZ, Miguel Angel
    • MANZANO MACHO, DavidPALLARES LOPEZ, Miguel Angel
    • G06F17/30
    • G06F17/30011G06F17/30023G06F17/30507G06F17/30516G06F17/30536G06F17/30548G06F17/30598G06F17/30861
    • A continuous query result estimator for use in a data stream management system to reduce data stream processing times, the data stream management system being operable to execute a continuous query against data items received via one or more input data streams to generate one or more output data streams. The continuous query result estimator (200) comprises a classification module (210) operable to classify a set of one or more data items received via the one or more input data streams into one of a plurality of input data groups, and a data store (220) configured to store, in association with each of the input data groups, a respective rule for estimating a result of executing the continuous query against a data item belonging to the input data group. The continuous query result estimator (200) also includes a result estimation module (230) operable to select a rule from the rules stored in the data store (220) on the basis of the classification performed by the classification module (210), and apply the selected rule to the received set of data items to generate an estimate for a result of executing the continuous query against the received set of data items.
    • 一种在数据流管理系统中用于减少数据流处理时间的连续查询结果估计器,所述数据流管理系统可操作以对经由一个或多个输入数据流接收的数据项执行连续查询,以生成一个或多个输出数据 流。 连续查询结果估计器(200)包括分类模块(210),其可操作以将经由所述一个或多个输入数据流接收的一组或多个数据项集合分组成多个输入数据组中的一个,以及数据存储器 220),被配置为与每个输入数据组相关联地存储用于估计针对属于所述输入数据组的数据项执行所述连续查询的结果的相应规则。 连续查询结果估计器(200)还包括结果估计模块(230),其可操作以基于由分类模块(210)执行的分类从存储在数据存储(220)中的规则中选择规则,并应用 所选择的规则到所接收的数据项集合,以生成对所接收的数据项集合执行连续查询的结果的估计。