大数据 MongoDB 3.2.1 分片
mongos> use test switched to db testmongos> for(var i=1;i sh.status()
.......
databases:
{"_id" : "test","primary" : "shard0000","partitioned" : false }
#partitioned 值为false 表示数据库尚未分片。
mongos> sh.enableSharding("test") #启用数据库分片
mongos> db.users.createIndex({"id":1}) #创建索引
mongos> sh.shardCollection("test.users",{"id":1})#表分片
{ "collectionsharded" : "test.users", "ok" : 1 }
mongos> sh.status()
......
{ "id" : { "$minKey" : 1 } } -->> { "id" : 2341 } on : shard0001 Timestamp(5, 1)
{ "id" : 2341 } -->> { "id" : 4682 } on : shard0001 Timestamp(3, 0)
{ "id" : 4682 } -->> { "id" : 7023 } on : shard0000 Timestamp(6, 1)
{ "id" : 7023 } -->> { "id" : 9364 } on : shard0000 Timestamp(1, 3)
{ "id" : 9364 } -->> { "id" : 13407 } on : shard0000 Timestamp(3, 2)
{ "id" : 13407 } -->> { "id" : 21295 } on : shard0000 Timestamp(3, 3)
{ "id" : 21295 } -->> { "id" : 25976 } on : shard0001 Timestamp(4, 2)
{ "id" : 25976 } -->> { "id" : 33545 } on : shard0001 Timestamp(4, 3)
{ "id" : 33545 } -->> { "id" : 38226 } on : shard0000 Timestamp(5, 2)
{ "id" : 38226 } -->> { "id" : 45910 } on : shard0000 Timestamp(5, 3)
{ "id" : 45910 } -->> { "id" : { "$maxKey" : 1 } } on : shard0001 Timestamp(6, 0)
#数据存放在两个分片服务器上即：shard0000、shard0001中。
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