What is the use-case for setting Kafka's replication factor to 0 in production?

Question

为生产环境设置复制因子0是否无效，或者是否存在有意义的用例？

Answer 1

Replication factor = 1 means there is a single copy of your data. If your broker fails then you lost all your data.

Replication factor = 2 means you have 2x copies of your data. So when 1 node fails then you ends up with a single copy of your data. When your 2nd node fails that your data is lost.

Replication factor = n means you have Nx copies of your data.

Replication factor = 0 does not makes any sense at all.

Answer 2

复制因子必须大于0. Kafka不允许用户创建没有副本的主题。