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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
图平台和图处理
|
25
3.2
典型平台
为满足图处理需求,已经出现了几种平台。图计算引擎和图数据库通常是分离的,这就要
求用户根据其处理需求来迁移数据。
图计算引擎
图计算引擎是只读的非事务处理引擎,主要用于高效执行图的迭代分析和对整张图的查
询。图计算引擎支持图算法的各种定义和处理样式,比如节点中心式方法(如
Pregel
、
GAS
1
模型)或基于
MapReduce
的方法(如
PACT
),
Giraph
、
GraphLab
、
Graph-Engine
和
Apache Spark
属于此类引擎。
图数据库
从事务处理的背景来看,图数据库主要关注用小型查询进行快速读写,通常只涉及图的
一小部分。图数据库的优点是操作稳健性和面向多用户的高并发可伸缩性。
3.2.1
选择平台
选择生产平台需要考虑很多因素,比如要运行的分析类型、性能需求、现有环境以及团队
偏好等。本书使用
Apache Spark
和
Neo4j
来展示图算法,因为它们都具有一些独特优势。
Apache Spark
(以下简称
Spark
)是一个横向扩展和以节点为中心的图计算引擎。其流行计
算框架和库支持数据科学的多种工作流程。
Spark
平台适用于如下场景。
•
算法本质上是可并行或可分割的。
•
算法工作流程需要在多种工具和多种语言的环境中进行“多语言”操作。
•
分析可以以批处理模式离线运行。
•
图分析针对没有转换成图格式的数据。
•
团队需要自己编写和实现算法,并且具备相关的专业知识。
•
团队使用图算法的频率不高。
•
团队更喜欢在
Hadoop
生态系统中保存所有数据和分析结果。 ...
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Publisher Resources
ISBN: 9787115546678