Machine 1 (ip-10-240-29-21) oplog.rs: { "ts" : { "t" : 1357863722000 , "i" : 1 }, "h" : 0, "v" : 2, "op" : "n", "ns" : "", "o" : { "msg" : "initiating set" } } { "ts" : { "t" : 1357865329000 , "i" : 1 }, "h" : 6910061698716008465, "v" : 2, "op" : "n", "ns" : "", "o" : { "msg" : "Reconfig set", "version" : 2 } } { "ts" : { "t" : 1357866346000 , "i" : 1 }, "h" : -7413762552519158796, "v" : 2, "op" : "n", "ns" : "", "o" : { "msg" : "Reconfig set", "version" : 3 } } system.replset: { "_id" : "rs0", "version" : 3, "members" : [ { "_id" : 0, "host" : "ip-10-240-29-21:27017" }, { "_id" : 1, "host" : "ip-10-226-97-195:27017" } ] } Machine 2 (ip-10-226-97-195) oplog.rs: { "ts" : { "t" : 1357864849000 , "i" : 1 }, "h" : 0, "v" : 2, "op" : "n", "ns" : "", "o" : { "msg" : "initiating set" } } system.replset: { "_id" : "rs0", "version" : 1, "members" : [ { "_id" : 0, "host" : "ip-10-226-97-195:27017" } ] }