How many nodes could be removed from the cluster at once

[c0desway]

I understand you are considering cascading failures, right?

But what if I’m sure the cascading failures would not going to be happened?
In addition, what if the math you’re worried about has no problem due to small traffic and using resources.
When assuming above is right, is it no problem to be removed several nodes functionally?

Plus, According to a link below,

What is the difference between Fail Over and Remove?

Practically I would like to know the difference between Fail Over and Remove. If one server is acting up I would probably “remove” it from the cluster and then when the problem is resolved reboot the server and add it back into the cluster. Doesn’t “Fail Over” do the same thing? I would think that it removes the server from the cluster and like remove you fix the problem and bring back into the cluster. What are the considerations when looking at the Web Console “Fail Over” and “Remove”?

It seems to be that the ‘Remove’ function is guaranteed by somehow internal process of couchbase. If it is, is it ok to be removed several nodes at once? (removing 3~5 nodes at once although replicas is 2) I mean, does removing multiple nodes has no any connection whatever with the value of replicas?

So then I ultimately wonder whether I could remove multiple nodes over than the value of replicas when the performance issue has no problem