November 2021
Intermediate to advanced
410 pages
12h 1m
Chinese
Content preview from MongoDB权威指南（第3版）
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359
第 23章
备份
定期对系统进行备份很重要。备份可以很好地防止大多数类型的故障，只有极少数的故障
是无法通过从干净的备份中恢复来解决的。本章涵盖了几种常用的备份选项：
•
对单一服务器进行备份，包括快照的备份与恢复过程；
•
对副本集进行备份时的特别考虑；
•
对分片集群进行备份。
只有在紧急情况下有信心迅速完成对备份的部署时，备份才是有用的。因此，对于选择的
任何备份技术，都要确保同时对备份和恢复的操作进行练习，直到熟悉恢复过程为止。
23.1
备份方法
在
MongoDB
中有许多种方式对集群进行备份。作为
MongoDB
的官方云服务，
MongoDB
Atlas
提供了连续备份和云供应商快照
。连续备份采用集群中的数据增量备份，确保备份
通常只比操作系统落后几秒。云供应商快照使用集群的云服务供应商（如
Amazon
Web
Services
、
Microsoft
Azure
或
Google Cloud Platform
）的快照功能提供本地化的备份存储。
连续备份是大多数情况下的最佳备份解决方案。
MongoDB
还通过
Cloud
Manager
和
Ops Manager
提供了备份的能力。
Cloud Manager
是
MongoDB
的一个托管备份
、监控和自动化服务。
Ops Manager
是本地部署的解决方案，具
有与
Cloud Manager
类似的功能。
对于直接管理
MongoDB
集群的个人和团队
，有若干备份策略可供使用。本章接下来的内
容会逐一介绍这些策略。
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