我有三个副本集，并试图进行分片。
即使我在收集数据中添加500000个文档也仅进入一个分片？ 。这是我第一次尝试创建碎片。
我也将getShardDistribution的输出发布在集合abcd和mybooks上
abcd集合在数据库shardingFinalDemo中，而mybooks在书中。
并且对于每个集合，它构成了整个数据集的一个块
这是sh.status（）的输出
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5e95cb79e8628e83e972957b")
}
shards:
{ "_id" : "first shard", "host" : "first shard/localhost:27011,localhost:27012,localhost:27013", "state" : 1 }
{ "_id" : "second shard", "host" : "second shard/localhost:27021,localhost:27022,localhost:27023", "state" : 1 }
{ "_id" : "sharding 3 ", "host" : "sharding 3 /localhost:27031,localhost:27032,localhost:27033", "state" : 1 }
active mongoses:
"4.2.2" : 1
autosplit:
Currently enabled: yes
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" : "books", "primary" : "second shard", "partitioned" : true, "version" : { "uuid" : UUID("97774c76-23f3-4455-af44-6b1f15f849c9"), "lastMod" : 1 } }
books.myBooks
shard key: { "_id" : 1 }
unique: true
balancing: true
chunks:
second shard 1
{ "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : second shard Timestamp(1, 0)
{ "_id" : "config", "primary" : "config", "partitioned" : true }
config.system.sessions
shard key: { "_id" : 1 }
unique: false
balancing: true
chunks:
first shard 1
{ "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : first shard Timestamp(1, 0)
{ "_id" : "demoDb", "primary" : "sharding 3 ", "partitioned" : true, "version" : { "uuid" : UUID("41903e6a-fcff-4ad6-8618-70b0fd5b3c07"), "lastMod" : 1 } }
demoDb.demoShard
shard key: { "_id" : 1 }
unique: true
balancing: true
chunks:
sharding 3 1
{ "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : sharding 3 Timestamp(1, 0)
{ "_id" : "demoShard", "primary" : "first shard", "partitioned" : true, "version" : { "uuid" : UUID("49913dce-d505-42cd-9009-a67f6f002b82"), "lastMod" : 1 } }
{ "_id" : "shardingFinalDemo", "primary" : "first shard", "partitioned" : true, "version" : { "uuid" : UUID("61324d20-5e3b-437d-ae52-542d479fd244"), "lastMod" : 1 } }
shardingFinalDemo.abcd
shard key: { "name" : 1 }
unique: true
balancing: true
chunks:
first shard 1
{ "name" : { "$minKey" : 1 } } -->> { "name" : { "$maxKey" : 1 } } on : first shard Timestamp(1, 0)
db.abcd.getShardDistribution()
Shard first shard at first shard/localhost:27011,localhost:27012,localhost:27013
data : 249KiB docs : 5000 chunks : 1
estimated data per chunk : 249KiB
estimated docs per chunk : 5000
Totals
data : 249KiB docs : 5000 chunks : 1
Shard first shard contains 100% data, 100% docs in cluster, avg obj size on shard : 51B
db.myBooks.getShardDistribution()
Shard second shard at second shard/localhost:27021,localhost:27022,localhost:27023
data : 25.16MiB docs : 455009 chunks : 1
estimated data per chunk : 25.16MiB
estimated docs per chunk : 455009
Totals
data : 25.16MiB docs : 455009 chunks : 1
Shard second shard contains 100% data, 100% docs in cluster, avg obj size on shard : 58B