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book
大数据项目管理:从规划到实现
by
Ted Malaska
,
Jonathan Seidman
January 2020
Beginner to intermediate
155 pages
3h 17m
Chinese
Posts & Telecom Press
Content preview from
大数据项目管理:从规划到实现
数据项目的主要类型及考虑因素
|
9
访问控制
谁可以访问数据流之外的持久化数据。
捕获元数据
通过字段添加元数据。
在更高级的系统中,你还可以找到下面这些额外的功能。
转换逻辑
在数据进入暂存区域之前,对数据进行自定义转换。
聚合和会话
知道如何基于数据窗口执行操作的转换逻辑。
治理问题
随着需要收集、存储和分析的数据越来越多,对数据保护和隐私等问题的关注也在日益增
长。因此,你需要制定计划以响应数据治理法规,并防止外部攻击、内部滥用等行为。你
需要确保对所收集的数据有清晰的了解和归类。第
6
章将继续探讨这个话题。
5.
延迟和传递确认
与实时系统不同,数据管道在延迟和传递确认方面通常有很大的回旋余地。不过,在你确
定系统期望时,数据管道的延迟和传递确认是非常重要的两个方面。接下来让我们定义这
两个术语,并看看需要为此做些什么。
延迟
延迟是指从数据源发布信息开始,直到给定处理层或暂存系统能够访问到信息所花费的时
间。为了更好地说明这一点,我们使用流处理应用程序作为示例。假设数据通过
Kafka
传
入,然后由
Flink
或
Spark Streaming
消费。应用程序可能会根据处理结果向下游系统发送
警报。我们可以将延迟量化为多个部分,如图
1-1
所示。
数据源
下游系统
流处理应用程序
触发器
Kafka
Kafka
A
B
C
D
图
1-1
:量化系统延迟
让我们来仔细看看每个部分。
•
A
:数据从源头到
Kafka
所花费的时间。这段时间就是我们所说的用于缓冲和网络传输
的时间。但可能存在一种扇入式架构,其中包括负载均衡器、微服务或其他可能导致延 ...
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Publisher Resources
ISBN: 9787115457363