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-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Garey Barrell Sent: Tuesday, April 29, 2008 5:16 PM To: Drakelist Subject: Re: [drakelist] TR-4 TX Hang-Up Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang ------------------------------------------------------------ ---------- Ron - That's a NEW one! :-) How long did the relay have to be energized to generate enough heat? Garey [EMAIL PROTECTED] wrote: > I saw once where the relay iron core was expanding do to the heat the > coil generated around it, which to this point is normal. But in this > case as the core expanded it shorted against a bare coil winding. > The core itself being at ground potential, when shorted against the > coil winding provided the ground path to key the relay. Once the > relay was unkeyed by removing power, it cooled, and worked again as > normal until it heated up again. So don't put aside the > possibility of a heat related problem in the relay itself. > > Ron / WB4HFN > > ------------------------------------------------------------ ---------- Submissions: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: - sponsored by ------------------------------------------------------------ ---------- ---------------------------------------------------------------------- Submissions: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: - sponsored by ---------------------------------------------------------------------- v sV5.1.1 在HDP3.0环境下，构建NRT Cube出现错误：Missing required configuration "partition.assignment.strategy"D Z N

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I O U 减小了事实表的大小； 便于维度的管理和维护，增加、删除和修改维度的属性时，不必对事实表的大量记录进行改动； 维度表可以为多个事实表同时使用，减少重复工作。 WZ x

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第一步，选择要使用的数据模型，并为此Cube输入一个唯一的名称（必需的）和描述（可选）（如图2-9所示）；这里还可以输入一个邮件通知列表，以在构建完成或出错时收到通知。如果不想接收在某些状态的通知，可以从“Notification Events”中将其去掉。HA r J B O

OLAP（Online Analytical Process），即联机分析处理，它可以以多维度的方式分析数据，并且能弹性地提供上卷（Roll-up）、下钻（Drill-down）和透视分析（Pivot）等操作，是呈现集成性决策信息的方法，其主要功能在于方便大规模数据分析及统计计算，多用于决策支持系统、商务智能或数据仓库。与之相区别的是联机交易处理（OLTP），联机交易处理侧重于基本的、日常的事务处理，包括数据的增、删、改、查。X Re

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u ee一个数据表或数据模型上的字段就它们要么是维度，要么是度量（可以被聚合）3oedo

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