MongoDB分片群集的部署（用心描述，详细易懂）！！
# mongo mongos> use schoolswitched to db school
mongos> for(var i=1;i show dbs
config0.031GB
school0.078GB
mongos> use school
switched to db school
mongos> show collections
system.indexes
users
mongos> db.users.find().limit(10)//查看头十行内容
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4ae"), "id" : 1, "name" : "jack1" }
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4af"), "id" : 2, "name" : "jack2" }
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4b0"), "id" : 3, "name" : "jack3" }
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4b1"), "id" : 4, "name" : "jack4" }
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4b2"), "id" : 5, "name" : "jack5" }
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4b3"), "id" : 6, "name" : "jack6" }
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4b4"), "id" : 7, "name" : "jack7" }
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4b5"), "id" : 8, "name" : "jack8" }
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4b6"), "id" : 9, "name" : "jack9" }
{ "_id" : ObjectId("5b4f6a24ef33d588c0dbc4b7"), "id" : 10, "name" : "jack10" }
mongos> sh.status() //查看数据库分片信息
--- Sharding Status ---
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5b4f68599dcf397cc4e7c598")
}
shards:
{"_id" : "shard0000","host" : "192.168.200.142:47017" }
{"_id" : "shard0001","host" : "192.168.200.142:47018" }
active mongoses:
"3.2.1" : 1
balancer:
Currently enabled:yes
Currently running:no
Failed balancer rounds in last 5 attempts:0
Migration Results for the last 24 hours:
No recent migrations
databases:
{"_id" : "school","primary" : "shard0000","partitioned" : false }
mongos> sh.enableSharding("school") //启用数据库分片
{ "ok" : 1 }
mongos> sh.status()
--- Sharding Status ---
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5b4f68599dcf397cc4e7c598")
}
shards:
{"_id" : "shard0000","host" : "192.168.200.142:47017" }
{"_id" : "shard0001","host" : "192.168.200.142:47018" }
active mongoses:
"3.2.1" : 1
balancer:
Currently enabled:yes
Currently running:no
Failed balancer rounds in last 5 attempts:0
Migration Results for the last 24 hours:
No recent migrations
databases:
{"_id" : "school","primary" : "shard0000","partitioned" : true }
mongos> db.users.createIndex({"id":1})//对users表创建索引
{
"raw" : {
"192.168.200.142:47017" : {
"createdCollectionAutomatically" : false,
"numIndexesBefore" : 1,
"numIndexesAfter" : 2,
"ok" : 1
}
},
"ok" : 1
}
mongos> sh.shardCollection("school.users",{"id":1})//表分片
{ "collectionsharded" : "school.users", "ok" : 1 }
mongos> sh.status()
--- Sharding Status ---
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5b4f68599dcf397cc4e7c598")
}
shards:
{"_id" : "shard0000","host" : "192.168.200.142:47017" }
{"_id" : "shard0001","host" : "192.168.200.142:47018" }
active mongoses:
"3.2.1" : 1
balancer:
Currently enabled:yes
Currently running:no
Failed balancer rounds in last 5 attempts:0
Migration Results for the last 24 hours:
No recent migrations
databases:
{"_id" : "school","primary" : "shard0000","partitioned" : true }
school.users
shard key: { "id" : 1 }
unique: false
balancing: true
chunks:
shard0000 3
{ "id" : { "$minKey" : 1 } } -->> { "id" : 4682 } on : shard0000 Timestamp(1, 0)
{ "id" : 4682 } -->> { "id" : 9364 } on : shard0000 Timestamp(1, 1)
{ "id" : 9364 } -->> { "id" : { "$maxKey" : 1 } } on : shard0000 Timestamp(1, 2) //分片成功
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