MongoDB集群搭建MongoDB的复制集群类型：·主从模式(master/slave)·副本集模式（replicaset）副本及模式至少3个节点（一主二从），从节点负责复制主节点的oplog
进入admin库，，激活collection分片并配置shard key唯一
>use admin
mongos> db.runCommand( { shardcollection : "test11.testcoll",key : {_id : 1 } , unique : true } )
{ "collectionsharded" : "test11.testcoll", "ok" :1 }
查看分片状态信息
mongos> db.printShardingStatus();
--- Sharding Status ---
sharding version: {
"_id" : 1,
"version" : 3,
"minCompatibleVersion" : 3,
"currentVersion" : 4,
"clusterId" :ObjectId("532fa07065574826130abfbf")
}
shards:
{ "_id" : "rs0", "host" :"rs0/172.23.214.47:27017,172.23.214.50:27017,172.23.215.61:27017" }
databases:
{ "_id" : "admin", "partitioned" : false, "primary" : "config"}
{ "_id" : "test11", "partitioned" : true, "primary" : "rs0" }
test11.testcoll
shard key: { "_id" : 1 }
chunks:
rs0 1
{ "_id" : { "$minKey" : 1 } } -->> { "_id": { "$maxKey" : 1 } } on : rs0 Timestamp(1, 0)
{ "_id" : "testdb", "partitioned" : true, "primary" : "rs0" }
{ "_id" : "test", "partitioned" : false, "primary" : "rs0" }
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