In what real-world scenarios is a semantic database better than a relational one?

Question

有没有像Metalog这样的语义数据库用于解决传统上用关系数据库完成的计算问题的实际（非学术）和公共（开源或免费）示例？

Answer 1

Semantic databases work much better if only part of your data follows a schema.

If you need additional columns in a semantic database, you just add them. Even for single rows. This is hard or inefficient in a relational database.

Also clustering is much more simple with semantic or tuple databases. Most often, this means just to install the database on N servers and set a few config options.