Minimal replica set config with backup

Question

3个节点副本集是否为1个隐藏，投票成员用作备份源的可行配置，假设读取性能可以接受？

Answer 1

真的不能给出更好的答案：这样可以正常工作。

Answer 2

The default recommended setup for redundancy and backup on the documentation is 3 members.

It is perfectly acceptable for a startup set.

Answer 3

Just to confirm, you have 1 primary, 2 secondaries, and a hidden node?

If so, don't do that - as the hidden node will still partake in elections, and you never want an even number of voting members.

I'd knock off one of the secondaries, so you're back to 3 nodes, or add in another secondary.