mongodb 3.2 分片部署步骤

#linux 网络优化1. 文件中/etc/sysctl.conf, 加入
net.core.somaxconn = 2048
fs.file-max = 2000000
fs.nr_open = 2000000
net.ipv4.ip_local_port_range = 1024 65535

• hard nofile 1000000
• soft nofile 1000000

2. 文件/etc/security/limits.conf中加入:

• hard nproc 1000000
• hard nproc 1000000

  3. mongo部分的优化
  echo never >/sys/kernel/mm/transparent_hugepage/enabled
  echo never > /sys/kernel/mm/transparent_hugepage/defrag

1. disable senux
   /etc/selinux/config
   SELINUX=disabled

1. 防火墙部分, 暂时停止firewalld
   firewall：
   systemctl start firewalld.service #启动firewall
   systemctl stop firewalld.service #停止firewall
   systemctl disable firewalld.service #禁止firewall开机启动

1. mongodb 安装
   如果是解压安装, 默认放到 /tools
   1. 解压到
   /root/tools/mongodb
   cd /
   ln -s /root/tools

   2. 加入PATH
   vim /etc/profile
   export PATH=$PATH:/tools/mongodb/bin

   对于rpm包, 运行下面命令
   rpm -ivh *.rpm

1. 配置mongodb
   mkdir /data/mongodb
   cd /data/mongodb
   mkdir db log

   常见配置文件, 并启动
   mongod --config configdb.conf

=====================================
https://docs.mongodb.org/manual/tutorial/deploy-shard-cluster/

1. 配置说明 
   234机器上:
   shard0 192.168.1.234:27018
   shard1 192.168.1.234:27019 
   configsrv 192.168.1.234:30001

1. 配置 configserver
   1. 文件配置的例子
   sharding:
   clusterRole: configsvr
   replication:
   replSetName: configReplSet
   net:
   port: <port>
   storage:
   dbpath: <path>

   2. 启动
   mongod --config configsrv1.conf
   非文件方式
   mongod --configsvr --replSet configReplSet --port <port> --dbpath <path>

1. 初始化configserver, 这里配置两个 configure
   1. 进入mongo shell
   mongo 192.168.1.234:30001
   rs.initiate( {
   _id: "configReplSet",
   configsvr: true,
   members: [ { _id: 0, host: "192.168.1.55:30001" }, { _id: 1, host: "192.168.1.234:30001" }
   ]
   } )

   2. 查看状态
   rs.status()

2. start mongos
   //mongos --configdb configReplSet/192.168.1.55:30001,192.168.1.234:30001 --port 37017&
   mongos --configdb configRS/192.168.1.234:30001 --port 37017 --logappend --logpath /data/mongodb/log/route.log&

1. connect to mongos
   mongo --host 192.168.1.234 --port 37017

1. add sharding
   1. 建立实例
   mkdir db2 db3
   修改对应的配置文件
   Note： 这个地方需要设置最大内存
   ulimit -v 10000000 修改最大虚拟地址空间为10G 
   --wiredTigerCacheSizeGB 5

   2. 加入分片
   // sh.addShard( "rs1/192.168.1.234:27018" ) // add a shard for a replica set named rs1 
   sh.addShard( "192.168.1.234:27018" )
   sh.addShard( "192.168.1.234:27019" )

   3. 激活分片
   sh.enableSharding("<database>") // db.runCommand( { enableSharding: <database> } )
   sh.enableSharding("mydb")

   4. 查看状态
   sh.status()

#########################
插入前的准备
sh.enableSharding("<database>") // db.runCommand( { enableSharding: <database> } )
sh.enableSharding("gwgps")

db.location.ensureIndex({"hostid":1})
db.location.ensureIndex({"posTime":1})

sh.shardCollection("gwgps.location", { "hostid": 1})