Mongodb的副本集Replica Set和分片Sharding
#./bin/mongod --dbpath=data/rs0-0/ --logpath=log/rs0-0.log --bind_ip 10.8.8.162 --fork --rest --logappend --replSet rs0 --port=30000##注：--rest是为了打开web监控。http://10.8.8.162:31000/_replSet可以查看各个节点的状态
#./bin/mongod --dbpath=data/rs0-1/ --logpath=log/rs0-1.log --bind_ip 10.8.8.162 --fork --rest --logappend --replSet rs0 --port=30001
#./bin/mongod --dbpath=data/rs0-2/ --logpath=log/rs0-2.log --bind_ip 10.8.8.162 --fork --rest --logappend --replSet rs0 --port=30002
#./bin/mongod --dbpath=data/rs0-arb/ --logpath=log/rs0-arb.log --bind_ip 10.8.8.162 --fork --rest --logappend --replSet rs0 --port=40000
#./bin/mongo --port 30000 --host 10.8.8.162
MongoDB shell version: 2.4.5
connecting to: 10.8.8.162:30000/test
> rs.conf()
null
> use admin
switched to db admin
> db.runCommand({"replSetInitiate" : {
..."_id":"rs0",##这个键指明了副本集的名称，必须与气动mongod进程时指定的名称一致！##
..."members":[ ##这个键指明服务器列表，我们以后还可以往副本集中加入服务器##
... {"_id":0,"host":"10.8.8.162:30000","priority":2},##“id”内嵌文档的键，用于唯一标示副本集中的某一台服务器."priority ：N，优先级，指明一个服务器的优先级，默认为1，可以是，通过这个我们可以指明副本集某台服务器节点初始为活跃节点"##
... {"_id":1,"host":"10.8.8.162:30001","priority":3},
... {"_id":2,"host":"10.8.8.162:30002","priority":4},
... {"_id":3,"host":"10.8.8.162:40000","arbiterOnly":"true"}##arbiterOnly ：true，仲裁节点，特定指明某个服务器节点为仲裁节点，仲裁节点不会复制数据，不会成为活跃节点，其存在的目的只有一个：当前活跃节点失效后，副本集内重新投票选活跃节点时，防止出现僵局！##
... ]
... }
... }
... )；
{
"info" : "Config now saved locally.Should come online in about a minute.",
"ok" : 1
}
rs0:SECONDARY> rs.status();##这个可能需要数分钟才能正常显示！##
{
"set" : "rs0",
"date" : ISODate("2014-04-18T09:06:41Z"),
"myState" : 2,
"syncingTo" : "10.8.8.162:30002",
"members" : [
{
"_id" : 0,
"name" : "10.8.8.162:30000",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 1411,
"optime" : Timestamp(1397811410, 1),
"optimeDate" : ISODate("2014-04-18T08:56:50Z"),
"self" : true
},
{
"_id" : 1,
"name" : "10.8.8.162:30001",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 591,
"optime" : Timestamp(1397811410, 1),
"optimeDate" : ISODate("2014-04-18T08:56:50Z"),
"lastHeartbeat" : ISODate("2014-04-18T09:06:39Z"),
"lastHeartbeatRecv" : ISODate("2014-04-18T09:06:39Z"),
"pingMs" : 0,
"syncingTo" : "10.8.8.162:30002"
},
{
"_id" : 2,
"name" : "10.8.8.162:30002",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 591,
"optime" : Timestamp(1397811410, 1),
"optimeDate" : ISODate("2014-04-18T08:56:50Z"),
"lastHeartbeat" : ISODate("2014-04-18T09:06:40Z"),
"lastHeartbeatRecv" : ISODate("2014-04-18T09:06:39Z"),
"pingMs" : 0,
"syncingTo" : "10.8.8.162:30000"##开始我觉得这里有些奇怪！当我用30002这个PRIMARY节点登陆之后再查看，显示就正常了！##
},
{
"_id" : 3,
"name" : "10.8.8.162:40000",
"health" : 1,
"state" : 7,
"stateStr" : "ARBITER",
"uptime" : 562,
"lastHeartbeat" : ISODate("2014-04-18T09:06:40Z"),
"lastHeartbeatRecv" : ISODate("2014-04-18T09:06:40Z"),
"pingMs" : 0
}
],
"ok" : 1
}
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