Three nodes using replica set in MongoDb and 2,

Question

in 3-node replicaSet, why, when 2 are below the third, become SECONDARY, not PRIMARY?

I want to have 2 mongods inside the DataCenter and one outside, so if the Datacenters fail, I want the third external mongod to become Primary.

Is it possible without an arbitrator?

+5

Wiliam Aug 26 '12 at 11:06

2 answers

(cluster_participants/2) + 1 ( , ), . noDe , .

, 5 noDe 3 , , 3 .

+3

Samuel García 13 . '12 19:01

Wiliam · Accepted Answer · 2012-08-26T11:11:50+0000

Ok, the answer is found:

?! , mongod , , . , . , , . , rep1-1 , , .