MongoDB对集合开启分片功能
mongos> sh.status()
--- Sharding Status ---
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5cc2dd241030c29eb9c33e2a")
}
shards:
{ "_id" : "rs01", "host" : "rs01/192.168.100.25:27001,192.168.100.26:27001", "state" : 1 }
{ "_id" : "rs02", "host" : "rs02/192.168.100.26:27002,192.168.101.25:27002", "state" : 1 }
{ "_id" : "rs03", "host" : "rs03/192.168.100.25:27003,192.168.101.25:27003", "state" : 1 }
active mongoses:
"3.6.12" : 3
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" : "config", "primary" : "config", "partitioned" : true }
config.system.sessions
shard key: { "_id" : 1 }
unique: false
balancing: true
chunks:
rs01 1
{ "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : rs01 Timestamp(1, 0)
{ "_id" : "test_db", "primary" : "rs03", "partitioned" : true }
test_db.test_tab
shard key: { "name" : 1 }
unique: false
balancing: true
chunks:
rs03 1
{ "name" : { "$minKey" : 1 } } -->> { "name" : { "$maxKey" : 1 } } on : rs03 Timestamp(1, 0)
mongos> db.handleResultMongo.insert({'name':'test'});
WriteResult({ "nInserted" : 1 })
mongos>
mongos>
mongos> show tables;
handleResultMongo
mongos> db.h
db.handleResultMongo db.hasOwnProperty db.help( db.hostInfo(
mongos> db.handleResultMongo.find()
{ "_id" : ObjectId("5cd5125795294c8733f3dad2"), "name" : "test" }
mongos> sh.enableSharding('scdataDB')
{
"ok" : 1,
"operationTime" : Timestamp(1557467898, 5),
"$clusterTime" : {
"clusterTime" : Timestamp(1557467898, 5),
"signature" : {
"hash" : BinData(0,"DPZYJwN+9VcAasQPMybjqKFbL3U="),
"keyId" : NumberLong("6684147943659798555")
}
}
}
mongos> sh.status()
--- Sharding Status ---
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5cc2dd241030c29eb9c33e2a")
}
shards:
{ "_id" : "rs01", "host" : "rs01/192.168.100.25:27001,192.168.100.26:27001", "state" : 1 }
{ "_id" : "rs02", "host" : "rs02/192.168.100.26:27002,192.168.101.25:27002", "state" : 1 }
{ "_id" : "rs03", "host" : "rs03/192.168.100.25:27003,192.168.101.25:27003", "state" : 1 }
active mongoses:
"3.6.12" : 3
autosplit:
Currently enabled: yes
balancer:
Currently enabled: yes
Currently running: no
Failed balancer rounds in last 5 attempts: 0
Migration Results for the last 24 hours:
No recent migrations
databases:
{ "_id" : "config", "primary" : "config", "partitioned" : true }
config.system.sessions
shard key: { "_id" : 1 }
unique: false
balancing: true
chunks:
rs01 1
{ "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : rs01 Timestamp(1, 0)
{ "_id" : "handleResultMongo", "primary" : "rs02", "partitioned" : true }
{ "_id" : "scdataDB", "primary" : "rs02", "partitioned" : true }
{ "_id" : "test_db", "primary" : "rs03", "partitioned" : true }
test_db.test_tab
shard key: { "name" : 1 }
unique: false
balancing: true
chunks:
rs03 1
{ "name" : { "$minKey" : 1 } } -->> { "name" : { "$maxKey" : 1 } } on : rs03 Timestamp(1, 0)
mongos> sh.shardCollection("scdataDB.handleResultMongo",{"_id":1})
{
"collectionsharded" : "scdataDB.handleResultMongo",
"collectionUUID" : UUID("94279e8c-e74b-4901-8e91-a61903901933"),
"ok" : 1,
"operationTime" : Timestamp(1557468137, 11),
"$clusterTime" : {
"clusterTime" : Timestamp(1557468137, 11),
"signature" : {
"hash" : BinData(0,"69UAIYlxWDxCsKBQ3IThOZasMmU="),
"keyId" : NumberLong("6684147943659798555")
}
}
}
mongos> db.handleResultMongo.stats()
{
"sharded" : true,
"capped" : false,
"ns" : "scdataDB.handleResultMongo",
"count" : 1,
"size" : 37,
"storageSize" : 16384,
"totalIndexSize" : 16384,
"indexSizes" : {
"_id_" : 16384
},
"avgObjSize" : 37,
"nindexes" : 1,
"nchunks" : 1,
"shards" : {
"rs02" : {
"ns" : "scdataDB.handleResultMongo",
"size" : 37,
"count" : 1,
"avgObjSize" : 37,
"storageSize" : 16384,
"capped" : false,
"wiredTiger" : {
"metadata" : {
"formatVersion" : 1
},
"creationString" : "access_pattern_hint=none,allocation_size=4KB,app_metadata=(formatVersion=1),assert=(commit_timestamp=none,read_timestamp=none),block_allocation=best,block_compressor=snappy,cache_resident=false,checksum=on,colgroups=,collator=,columns=,dictionary=0,encryption=(keyid=,name=),exclusive=false,extractor=,format=btree,huffman_key=,huffman_value=,ignore_in_memory_cache_size=false,immutable=false,internal_item_max=0,internal_key_max=0,internal_key_truncate=true,internal_page_max=4KB,key_format=q,key_gap=10,leaf_item_max=0,leaf_key_max=0,leaf_page_max=32KB,leaf_value_max=64MB,log=(enabled=true),lsm=(auto_throttle=true,bloom=true,bloom_bit_count=16,bloom_config=,bloom_hash_count=8,bloom_oldest=false,chunk_count_limit=0,chunk_max=5GB,chunk_size=10MB,merge_custom=(prefix=,start_generation=0,suffix=),merge_max=15,merge_min=0),memory_page_image_max=0,memory_page_max=10m,os_cache_dirty_max=0,os_cache_max=0,prefix_compression=false,prefix_compression_min=4,source=,split_deepen_min_child=0,split_deepen_per_child=0,split_pct=90,type=file,value_format=u",
"type" : "file",
"uri" : "statistics:table:scdataDB/collection-17-752567444311372324",
"LSM" : {
"bloom filter false positives" : 0,
"bloom filter hits" : 0,
"bloom filter misses" : 0,
"bloom filter pages evicted from cache" : 0,
"bloom filter pages read into cache" : 0,
"bloom filters in the LSM tree" : 0,
"chunks in the LSM tree" : 0,
"highest merge generation in the LSM tree" : 0,
"queries that could have benefited from a Bloom filter that did not exist" : 0,
"sleep for LSM checkpoint throttle" : 0,
"sleep for LSM merge throttle" : 0,
"total size of bloom filters" : 0
},
"block-manager" : {
"allocations requiring file extension" : 3,
"blocks allocated" : 3,
"blocks freed" : 0,
"checkpoint size" : 4096,
"file allocation unit size" : 4096,
"file bytes available for reuse" : 0,
"file magic number" : 120897,
"file major version number" : 1,
"file size in bytes" : 16384,
"minor version number" : 0
},
"btree" : {
"btree checkpoint generation" : 19914,
"column-store fixed-size leaf pages" : 0,
"column-store internal pages" : 0,
"column-store variable-size RLE encoded values" : 0,
"column-store variable-size deleted values" : 0,
"column-store variable-size leaf pages" : 0,
"fixed-record size" : 0,
"maximum internal page key size" : 368,
"maximum internal page size" : 4096,
"maximum leaf page key size" : 2867,
"maximum leaf page size" : 32768,
"maximum leaf page value size" : 67108864,
"maximum tree depth" : 3,
"number of key/value pairs" : 0,
"overflow pages" : 0,
"pages rewritten by compaction" : 0,
"row-store internal pages" : 0,
"row-store leaf pages" : 0
},
"cache" : {
"bytes currently in the cache" : 1142,
"bytes read into cache" : 0,
"bytes written from cache" : 131,
"checkpoint blocked page eviction" : 0,
"data source pages selected for eviction unable to be evicted" : 0,
"eviction walk passes of a file" : 0,
"eviction walk target pages histogram - 0-9" : 0,
"eviction walk target pages histogram - 10-31" : 0,
"eviction walk target pages histogram - 128 and higher" : 0,
"eviction walk target pages histogram - 32-63" : 0,
"eviction walk target pages histogram - 64-128" : 0,
"eviction walks abandoned" : 0,
"eviction walks gave up because they restarted their walk twice" : 0,
"eviction walks gave up because they saw too many pages and found no candidates" : 0,
"eviction walks gave up because they saw too many pages and found too few candidates" : 0,
"eviction walks reached end of tree" : 0,
"eviction walks started from root of tree" : 0,
"eviction walks started from saved location in tree" : 0,
"hazard pointer blocked page eviction" : 0,
"in-memory page passed criteria to be split" : 0,
"in-memory page splits" : 0,
"internal pages evicted" : 0,
"internal pages split during eviction" : 0,
"leaf pages split during eviction" : 0,
"modified pages evicted" : 0,
"overflow pages read into cache" : 0,
"page split during eviction deepened the tree" : 0,
"page written requiring cache overflow records" : 0,
"pages read into cache" : 0,
"pages read into cache after truncate" : 1,
"pages read into cache after truncate in prepare state" : 0,
"pages read into cache requiring cache overflow entries" : 0,
"pages requested from the cache" : 2,
"pages seen by eviction walk" : 0,
"pages written from cache" : 2,
"pages written requiring in-memory restoration" : 0,
"tracked dirty bytes in the cache" : 0,
"unmodified pages evicted" : 0
},
"cache_walk" : {
"Average difference between current eviction generation when the page was last considered" : 0,
"Average on-disk page image size seen" : 0,
"Average time in cache for pages that have been visited by the eviction server" : 0,
"Average time in cache for pages that have not been visited by the eviction server" : 0,
"Clean pages currently in cache" : 0,
"Current eviction generation" : 0,
"Dirty pages currently in cache" : 0,
"Entries in the root page" : 0,
"Internal pages currently in cache" : 0,
"Leaf pages currently in cache" : 0,
"Maximum difference between current eviction generation when the page was last considered" : 0,
"Maximum page size seen" : 0,
"Minimum on-disk page image size seen" : 0,
"Number of pages never visited by eviction server" : 0,
"On-disk page image sizes smaller than a single allocation unit" : 0,
"Pages created in memory and never written" : 0,
"Pages currently queued for eviction" : 0,
"Pages that could not be queued for eviction" : 0,
"Refs skipped during cache traversal" : 0,
"Size of the root page" : 0,
"Total number of pages currently in cache" : 0
},
"compression" : {
"compressed pages read" : 0,
"compressed pages written" : 0,
"page written failed to compress" : 0,
"page written was too small to compress" : 2,
"raw compression call failed, additional data available" : 0,
"raw compression call failed, no additional data available" : 0,
"raw compression call succeeded" : 0
},
"cursor" : {
"bulk-loaded cursor-insert calls" : 0,
"close calls that result in cache" : 0,
"create calls" : 1,
"cursor operation restarted" : 0,
"cursor-insert key and value bytes inserted" : 38,
"cursor-remove key bytes removed" : 0,
"cursor-update value bytes updated" : 0,
"cursors reused from cache" : 1,
"insert calls" : 1,
"modify calls" : 0,
"next calls" : 2,
"open cursor count" : 0,
"prev calls" : 1,
"remove calls" : 0,
"reserve calls" : 0,
"reset calls" : 5,
"search calls" : 0,
"search near calls" : 0,
"truncate calls" : 0,
"update calls" : 0
},
"reconciliation" : {
"dictionary matches" : 0,
"fast-path pages deleted" : 0,
"internal page key bytes discarded using suffix compression" : 0,
"internal page multi-block writes" : 0,
"internal-page overflow keys" : 0,
"leaf page key bytes discarded using prefix compression" : 0,
"leaf page multi-block writes" : 0,
"leaf-page overflow keys" : 0,
"maximum blocks required for a page" : 1,
"overflow values written" : 0,
"page checksum matches" : 0,
"page reconciliation calls" : 2,
"page reconciliation calls for eviction" : 0,
"pages deleted" : 0
},
"session" : {
"object compaction" : 0
},
"transaction" : {
"update conflicts" : 0
}
},
"nindexes" : 1,
"totalIndexSize" : 16384,
"indexSizes" : {
"_id_" : 16384
},
"ok" : 1,
"operationTime" : Timestamp(1557468182, 1),
"$gleStats" : {
"lastOpTime" : Timestamp(0, 0),
"electionId" : ObjectId("7fffffff0000000000000001")
},
"$configServerState" : {
"opTime" : {
"ts" : Timestamp(1557468186, 1),
"t" : NumberLong(1)
}
},
"$clusterTime" : {
"clusterTime" : Timestamp(1557468186, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
}
},
"ok" : 1,
"operationTime" : Timestamp(1557468186, 1),
"$clusterTime" : {
"clusterTime" : Timestamp(1557468186, 1),
"signature" : {
"hash" : BinData(0,"mYqJKszTfPJ4f1LSGHc/7SCjhSM="),
"keyId" : NumberLong("6684147943659798555")
}
}
}
查看是否分片
mongos> db.handleResultMongo.stats().sharded
true
插入数据测试
use scdataDB
for(var i=1;i<=10000;i++){db.handleResultMongo.insert({
x:i,name:"MACLEAN",name1:"MACLEAN",name2:"MACLEAN",name3:"MACLEAN"
})}
在每个分片上查看数据分布
rs01
rs02
rs03
刚开始没有分片成功：
分片成功后显示
测试完毕后删除表
db.handleResultMongo.drop()
删除测试的库
use test_db
db.dropDatabase()
创建账号：
创建账号
db.createUser(
{
user:"datacenter_r",
pwd:"******",
roles:[{role:"read",db:"scdataDB"}]
})
db.createUser(
{
user:"datacenter_rw",
pwd:"****",
roles:[{role:"readWrite",db:"scdataDB"}]
})