在一台机器上模拟mongodb分片

首先选择一个目录在其中建立以下2个文件夹：data和log

在data下建立9个文件夹：

其中前3个为配置服务器所在文件夹，按照官网要求，一个集群需要3个config server

rs-a-n和rs-b-n为两个replica set（副本集），我们的目的就是将它们给集群了。

一.初始化副本集

初始化mongod：

初始化副本集，这里形成两个副本集shard-a和shard-b，图示为shard-a初始化：（Wonder为我的主机名）

同理，shard-b也可以初始化。使用rs.status()可以查看副本集的状态：

shard-a:PRIMARY> rs.status()
{
        "set" : "shard-a",
        "date" : ISODate("2015-08-04T12:11:31.793Z"),
        "myState" : 1,
        "members" : [
                {
                        "_id" : 0,
                        "name" : "Wonder:30000",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 650,
                        "optime" : Timestamp(1438690267, 1),
                        "optimeDate" : ISODate("2015-08-04T12:11:07Z"),
                        "electionTime" : Timestamp(1438689898, 2),
                        "electionDate" : ISODate("2015-08-04T12:04:58Z"),
                        "configVersion" : 3,
                        "self" : true
                },
                {
                        "_id" : 1,
                        "name" : "Wonder:30001",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 43,
                        "optime" : Timestamp(1438690267, 1),
                        "optimeDate" : ISODate("2015-08-04T12:11:07Z"),
                        "lastHeartbeat" : ISODate("2015-08-04T12:11:29.800Z"),
                        "lastHeartbeatRecv" : ISODate("2015-08-04T12:11:30.115Z"
),
                        "pingMs" : 0,
                        "syncingTo" : "Wonder:30000",
                        "configVersion" : 3
                },
                {
                        "_id" : 2,
                        "name" : "Wonder:30002",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 23,
                        "optime" : Timestamp(1438690267, 1),
                        "optimeDate" : ISODate("2015-08-04T12:11:07Z"),
                        "lastHeartbeat" : ISODate("2015-08-04T12:11:29.800Z"),
                        "lastHeartbeatRecv" : ISODate("2015-08-04T12:11:29.804Z"
),
                        "pingMs" : 0,
                        "configVersion" : 3
                }
        ],
        "ok" : 1
}