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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
23
第
3
章
图平台和图处理
本章将简要介绍图处理的各种方法以及常用平台,进一步研究本书所用的两个平台:
Apache Spark
和
Neo4j
,以及它们的适用场景。此外,本章还将提供两个平台的安装指南,
以便为后续几章做好铺垫。
3.1
图平台和图处理的注意事项
图处理具有一些独特的性质,例如其计算过程是由结构驱动、全局聚焦的,而且很难解
析。本节将介绍图平台和图处理的一般注意事项。
3.1.1
平台注意事项
对于图处理,纵向扩展和横向扩展哪个更好,一直存在争议。是应该使用强大的多核、大
内存计算机,并且关注高效的数据结构和多线程算法,还是应该在分布式处理框架和与之
相关的算法上投入精力呢?
COST
(
configuration that outperforms a single thread
)是一种很有用的评估方法,
Frank McSherry
、
Michael Isard
和
Derek Murray
的论文“
Scalability! But
at What COST?
”有相关介绍。
COST
可用于比较系统的可伸缩性和引入的开销。其核心思想是,配置良好的系统使用优化的
算法和数据结构,在性能上能超过当前通用的横向扩展解决方案。采用这种方法衡量性能
时,并不会出现由于采用并行处理而掩盖低效率的情况。将可伸缩性和高效使用资源的概
念区分开来,有助于构建可直接按需配置的平台。
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Publisher Resources
ISBN: 9787115546678