1. 當前狀態

C:/>mongo 127.0.0.1:2222MongoDB shell version: 1.8.3connecting to: 127.0.0.1:2222/testneu:PRIMARY> rs.conf(){        "_id" : "neu",        "version" : 3,        "members" : [                {                        "_id" : 0,                        "host" : "ZJNO9LZF6G8LBPS:1111"                },                {                        "_id" : 1,                        "host" : "ZJNO9LZF6G8LBPS:2222"                },                {                        "_id" : 2,                        "host" : "ZJNO9LZF6G8LBPS:9999",                        "arbiterOnly" : true                }        ]}neu:PRIMARY> rs.status(){        "set" : "neu",        "date" : ISODate("2012-12-08T02:26:33Z"),        "myState" : 1,        "members" : [                {                        "_id" : 0,                        "name" : "ZJNO9LZF6G8LBPS:1111",                        "health" : 1,                        "state" : 2,                        "stateStr" : "SECONDARY",                        "uptime" : 109,                        "optime" : {                                "t" : 1354852100000,                                "i" : 1                        },                        "optimeDate" : ISODate("2012-12-07T03:48:20Z"),                        "lastHeartbeat" : ISODate("2012-12-08T02:26:32Z")                },                {                        "_id" : 1,                        "name" : "ZJNO9LZF6G8LBPS:2222",                        "health" : 1,                        "state" : 1,                        "stateStr" : "PRIMARY",                        "optime" : {                                "t" : 1354852100000,                                "i" : 1                        },                        "optimeDate" : ISODate("2012-12-07T03:48:20Z"),                        "self" : true                },                {                        "_id" : 2,                        "name" : "ZJNO9LZF6G8LBPS:9999",                        "health" : 1,                        "state" : 7,                        "stateStr" : "ARBITER",                        "uptime" : 59,                        "optime" : {                                "t" : 0,                                "i" : 0                        },                        "optimeDate" : ISODate("1970-01-01T00:00:00Z"),                        "lastHeartbeat" : ISODate("2012-12-08T02:26:32Z")                }        ],        "ok" : 1}

2. 在新窗口中啟動mongod進程

D:/mongodb>mongod --dbpath D:/mongodb/neu-2 --port 3333 --replSet neuSat Dec 08 10:37:09 [initandlisten] MongoDB starting : pid=368 port=3333 dbpath=D:/mongodb/neu-2 32-bit

** NOTE: when using MongoDB 32 bit, you are limited to about 2 gigabytes of data**       see http://blog.mongodb.org/post/137788967/32-bit-limitations**       with --dur, the limit is lower

Sat Dec 08 10:37:09 [initandlisten] db version v1.8.3, pdfile version 4.5

……

3. 增加成員

neu:PRIMARY> rs.add("ZJNO9LZF6G8LBPS:3333")Sat Dec 08 10:37:42 DBClientCursor::init call() failedSat Dec 08 10:37:42 query failed : admin.$cmd { replSetReconfig: { _id: "neu", version: 4, members: [ { _id: 0, host: "ZJNO9LZF6G8LBPS:1111" }, { _id: 1, host: "ZJNO9LZF6G8LBPS:2222" }, { _id: 2, host: "ZJNO9LZF6G8LBPS:9999", arbiterOnly: true }, { _id: 3.0, host: "ZJNO9LZF6G8LBPS:3333" } ] } } to: 127.0.0.1:2222shell got exception during reconfig: Error: error doing query: failedin some circumstances, the primary steps down and closes connections on a reconfignullSat Dec 08 10:37:42 trying reconnect to 127.0.0.1:2222Sat Dec 08 10:37:42 reconnect 127.0.0.1:2222 ok4. 查看當前狀態

rs.status()

新成員初始狀態為"stateStr" : "(not reachable/healthy)",然后變成"stateStr" : "STARTUP2",然后變成"stateStr" : "RECOVERING",最后當數據同步成功后，狀態變為"stateStr" : "SECONDARY"。

5. 副本集最新狀態

neu:PRIMARY>  rs.conf(){        "_id" : "neu",        "version" : 4,        "members" : [                {                        "_id" : 0,                        "host" : "ZJNO9LZF6G8LBPS:1111"                },                {                        "_id" : 1,                        "host" : "ZJNO9LZF6G8LBPS:2222"                },                {                        "_id" : 2,                        "host" : "ZJNO9LZF6G8LBPS:9999",                        "arbiterOnly" : true                },                {                        "_id" : 3,                        "host" : "ZJNO9LZF6G8LBPS:3333"                }        ]}

neu:PRIMARY> rs.status(){        "set" : "neu",        "date" : ISODate("2012-12-08T02:45:15Z"),        "myState" : 1,        "members" : [                {                        "_id" : 0,                        "name" : "ZJNO9LZF6G8LBPS:1111",                        "health" : 1,                        "state" : 2,                        "stateStr" : "SECONDARY",                        "uptime" : 451,                        "optime" : {                                "t" : 1354934262000,                                "i" : 1                        },                        "optimeDate" : ISODate("2012-12-08T02:37:42Z"),                        "lastHeartbeat" : ISODate("2012-12-08T02:45:14Z")                },                {                        "_id" : 1,                        "name" : "ZJNO9LZF6G8LBPS:2222",                        "health" : 1,                        "state" : 1,                        "stateStr" : "PRIMARY",                        "optime" : {                                "t" : 1354934262000,                                "i" : 1                        },                        "optimeDate" : ISODate("2012-12-08T02:37:42Z"),                        "self" : true                },                {                        "_id" : 2,                        "name" : "ZJNO9LZF6G8LBPS:9999",                        "health" : 1,                        "state" : 7,                        "stateStr" : "ARBITER",                        "uptime" : 451,                        "optime" : {                                "t" : 0,                                "i" : 0                        },                        "optimeDate" : ISODate("1970-01-01T00:00:00Z"),                        "lastHeartbeat" : ISODate("2012-12-08T02:45:14Z")                },                {                        "_id" : 3,                        "name" : "ZJNO9LZF6G8LBPS:3333",                        "health" : 1,                        "state" : 2,                        "stateStr" : "SECONDARY",                        "uptime" : 445,                        "optime" : {                                "t" : 1354934262000,                                "i" : 1                        },                        "optimeDate" : ISODate("2012-12-08T02:37:42Z"),                        "lastHeartbeat" : ISODate("2012-12-08T02:45:14Z")                }        ],        "ok" : 1}