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O'Reilly Platform
book
数据分析之图算法: 基于Spark和Neo4j
by
Mark Needham
,
Amy E. Hodler
September 2020
Intermediate to advanced
213 pages
5h 25m
Chinese
Posts & Telecom Press
Content preview from
数据分析之图算法: 基于Spark和Neo4j
26
|
第
3
章
•
分析结果与事务性工作负载集成。
•
结果用于增强已有的图。
•
团队需要集成基于图的可视化工具。
•
团队希望采用预打包和提供支持的算法。
此外,有些组织兼用
Spark
和
Neo4j
进行图处理:将
Spark
用于大规模数据集的高层筛选
与预处理以及数据集成,将
Neo4j
用于特定处理并且与基于图的应用集成。
3.2.2
Apache Spark
Spark
是用于大规模数据处理的图计算引擎。它使用一种名为
DataFrame
的抽象表来表示
和处理以行列(列要指定名称和类型)方式组织的数据。该平台集成了多种数据源,支持
Scala
、
Python
和
R
等语言。
Spark
支持多种分析库,如图
3-1
所示。它具备基于内存的系
统,在运行时采用高效分布式计算图。
图
3-1
:
Spark
是一个开源的分布式通用集群计算框架,包含适用于各种工作负载的模块
GraphFrames
是
Spark
的一个图处理库,于
2016
年替代
GraphX
,但是它与核心
Spark
是分
离的。
GraphFrames
基于
GraphX
,但是使用
DataFrame
作为底层数据结构。
GraphFrames
支持
Java
、
Scala
和
Python
等编程语言。
2019
年春,提案“
Spark
Graph:
Property
Graphs,
Cypher
Queries,
and Algorithms
”被接受(参见本章“
Spark Graph
的发展”部分的说明)。
我们希望使用
DataFrame
框架和
Cypher
查询语言,将许多图功能引入核心
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Publisher Resources
ISBN: 9787115546678