MONGODB Best Practices

最新推荐文章于 2025-12-29 09:25:10 发布

转载最新推荐文章于 2025-12-29 09:25:10 发布 · 532 阅读

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本文概述了数据模型设计的最佳实践，包括如何使用顶级对象、详细项细节对象、嵌入式对象以及处理复杂关系和性能优化的方法。重点讨论了在数据集大小和性能考量下，选择将对象嵌入或作为独立集合的策略。

"First class" objects, that are at top level, typically have their own collection.
Line item detail objects typically are embedded.
Objects which follow an object modelling "contains" relationship should generally be embedded.
Many to many relationships are generally done by linking.
Collections with only a few objects may safely exist as separate collections, as the whole collection is quickly cached in application server memory.
Embedded objects are a bit harder to link to than "top level" objects in collections.
It is more difficult to get a system-level view for embedded objects. When needed an operation of this sort is performed by using MongoDB's map/reduce facility.
If the amount of data to embed is huge (many megabytes), you may reach the limit on size of a single object. See alsoGridFS.
If performance is an issue, embed.