一、mongodb分片群集

cd /opt
tar zxvf mongodb-linux-x86_64-3.2.1.tgz         #将包拖入至/opt下
mv mongodb-linux-x86_64-3.2.1 /usr/local/mongodb
cd /usr/local/mongodb
cd bin/
ln -s /usr/local/mongodb/bin/mongo /usr/bin/mongo
ln -s /usr/local/mongodb/bin/mongod /usr/bin/mongod
mkdir -p /data/mongodb/mongodb{1,2,3,4}
cd /data/mongodb
mkdir logs
cd logs
touch mongodb{1,2,3,4}.log
chmod 777 *
ulimit -u 25000     #优化打开进程和文件数量，否则会造成缓存卡死
ulimit -n 25000cd /usr/local/mongodb/bin/
vim mongodb1.conf
port=37017
dbpath=/data/mongodb/mongodb1
logpath=/data/mongodb/logs/mongodb1.log
logappend=true
fork=true
maxConns=5000
storageEngine=mmapv1
configsvr=true

如果某节点内存不足时，从其他节点分配内存

sysctl -w vm.zone_reclaim_mode=0
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag

启动
mongod -f mongodb1.conf
mongo --port 37017

再创建二个实例

cp -p mongodb1.conf mongodb2.conf
vim mongodb2.conf
port=47017
dbpath=/data/mongodb/mongodb2
logpath=/data/mongodb/logs/mongodb2.log
logappend=true
fork=true
maxConns=5000
storageEngine=mmapv1
shardsvr=truecp -p mongodb2.conf mongodb3.conf
vim mongodb3.conf
port=47018
dbpath=/data/mongodb/mongodb3
logpath=/data/mongodb/logs/mongodb3.log
logappend=true
fork=true
maxConns=5000
storageEngine=mmapv1
shardsvr=truemongod -f mongodb2.conf
mongod -f mongodb3.conf     #启动mongo --port 47017
mongo --port 47018

启动路由服务器

./mongos --port 27017 --fork --logpath=/usr/local/mongodb/bin/route.log --configdb 192.168.241.9:37017 --chunkSize 1                ##mongos开启路由服务器
2021-04-13T09:13:29.225+0800 W SHARDING [main] Running a sharded cluster with fewer than 3 config servers should only be done for testing purposes and is not recommended for production.
about to fork child process, waiting until server is ready for connections.
forked process: 63252
child process started successfully, parent exiting

查看分片

[root@localhost bin]# mongo
MongoDB shell version: 3.2.1
connecting to: test
Server has startup warnings:
2021-04-13T09:46:43.802+0800 I CONTROL  [main] ** WARNING: You are running this process as the root user, which is not recommended.
2021-04-13T09:46:43.802+0800 I CONTROL  [main] mongos> show dbs
config  0.031GBmongos> sh.status()           #shards下为空，没有分片服务器
--- Sharding Status --- sharding version: {"_id" : 1,"minCompatibleVersion" : 5,"currentVersion" : 6,"clusterId" : ObjectId("6074f039076ea44dc58c1a90")
}shards:active mongoses:"3.2.1" : 1balancer:Currently enabled:  yesCurrently running:  noFailed balancer rounds in last 5 attempts:  0Migration Results for the last 24 hours: No recent migrationsdatabases:
# shards此时为空的#添加分片
mongos> sh.addShard("192.168.241.9:47017")
{ "shardAdded" : "shard0000", "ok" : 1 }
mongos> sh.addShard("192.168.241.9:47018")
{ "shardAdded" : "shard0001", "ok" : 1 }
mongos> sh.status()
--- Sharding Status --- sharding version: {"_id" : 1,"minCompatibleVersion" : 5,"currentVersion" : 6,"clusterId" : ObjectId("6074f039076ea44dc58c1a90")
}shards:{  "_id" : "shard0000",  "host" : "192.168.241.9:47017" }{  "_id" : "shard0001",  "host" : "192.168.241.9:47018" }active mongoses:"3.2.1" : 1balancer:Currently enabled:  yesCurrently running:  noFailed balancer rounds in last 5 attempts:  0Migration Results for the last 24 hours: No recent migrationsdatabases:————分片功能——————
use info
db.test.insert({"id":1,"name":"tx"})
for (var i=2;i<=1000;i++)db.test.insert ({"id":i,"name":"tom"+i})show tables
db.test.find().limit(5)
{ "_id" : ObjectId("6074fb0a08763fc9b512d6ee"), "id" : 1, "name" : "tx" }
{ "_id" : ObjectId("6074fb3908763fc9b512d6ef"), "id" : 2, "name" : "tom2" }
{ "_id" : ObjectId("6074fb3908763fc9b512d6f0"), "id" : 3, "name" : "tom3" }
{ "_id" : ObjectId("6074fb3908763fc9b512d6f1"), "id" : 4, "name" : "tom4" }
{ "_id" : ObjectId("6074fb3908763fc9b512d6f2"), "id" : 5, "name" : "tom5" }
这里说明数据已经成功导入sh.status()
--- Sharding Status --- sharding version: {"_id" : 1,"minCompatibleVersion" : 5,"currentVersion" : 6,"clusterId" : ObjectId("6074f039076ea44dc58c1a90")
}shards:{  "_id" : "shard0000",  "host" : "192.168.241.9:47017" }{  "_id" : "shard0001",  "host" : "192.168.241.9:47018" }active mongoses:"3.2.1" : 1balancer:Currently enabled:  yesCurrently running:  noFailed balancer rounds in last 5 attempts:  0Migration Results for the last 24 hours: No recent migrationsdatabases:{  "_id" : "info",  "primary" : "shard0000",  "partitioned" : false }
#"partitioned" : false 说明没有分片sh.enableSharding("info")          #启动数据库分片
sh.status()databases:{  "_id" : "info",  "primary" : "shard0000",  "partitioned" : true }db.test.createIndex({"id":1})          #对test表创建索引
{"raw" : {"192.168.241.9:47017" : {"createdCollectionAutomatically" : false,"numIndexesBefore" : 1,"numIndexesAfter" : 2,"ok" : 1}},"ok" : 1
}sh.shardCollection("info.test",{"id":1})       #表分片
{ "collectionsharded" : "info.test", "ok" : 1 }sh.status()

二、分片管理

use info
for (var i=1;i<=50000;i++)db.test2.insert({"id":1,"name":"jack"+i})
db.test2.createIndex({"id":1})
sh.shardCollection("info.test2",{"id":1})
db.test2.stats()#添加标签
sh.addShardTag("shard0000","sales00")
sh.addShardTag("shard0001","sales01")#连接配置服务器
mongo --port 37017use config
show tables
...
chunks
collections
databases               #这3个集合是之前定义的分片服务器的信息
...cd /use/local/mongodb/bin
cp -p mongodb3.conf mongodb4.conf
vim mongodb4.conf
port=47019
dbpath=/data/mongodb/mongodb4
logpath=/data/mongodb/logs/mongodb4.log
logappend=true
fork=true
maxConns=5000
storageEngine=mmapv1
shardsvr=truemongod -f mongodb4.confmongo
sh.addShard("192.168.241.9:47019")
chunks:shard0000            4shard0001          4shard0000          3删除分片节点
use admin
db.runCommand({"removeshard":"192.168.241.9:47019"})

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“芒果数据库”————mongodb分片全集和管理

目录

一、mongodb分片群集

二、分片管理

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