MongoDB 是文档类数据库(json),是海量级数据存储的数据库 被称为最像关系型数据库的NoSQL
第一章:逻辑结构
MongoDB 逻辑结构 MySQL逻辑结构 库database 库 集合 表 文档 数据行
第二章: 安装部署
1.系统准备
(1) redhat或centos6.2 以上系统 (2) 系统开发包完整 (3) ip地址和hosts文件解析正常 (4) iptables防火墙&SElinux关闭 (5) 关闭大页内存机制
######################################################################## root用户下 在vi /etc/rc.local最后添加如下代码 if test -f /sys/kernel/mm/transparent_hugepage/enabled; then echo never > /sys/kernel/mm/transparent_hugepage/enabled fi if test -f /sys/kernel/mm/transparent_hugepage/defrag; then echo never > /sys/kernel/mm/transparent_hugepage/defrag fi
临时关闭大页内存 echo never > /sys/kernel/mm/transparent_hugepage/enabled echo never > /sys/kernel/mm/transparent_hugepage/defrag
cat /sys/kernel/mm/transparent_hugepage/enabled
cat /sys/kernel/mm/transparent_hugepage/defrag
其他系统关闭参照官方文档:
https://docs.mongodb.com/manual/tutorial/transparent-huge-pages/
为什么要关闭? Transparent Huge Pages (THP) is a Linux memory management system that reduces the overhead of Translation Lookaside Buffer (TLB) lookups on machines with large amounts of memory by using larger memory pages. However, database workloads often perform poorly with THP, because they tend to have sparse rather than contiguous memory access patterns. You should disable THP on Linux machines to ensure best performance with MongoDB. ############################################################################
2.MongoDB的安装
创建所需用户和组
useradd mongod
passwd mongod
创建mongodb所需目录结构
mkdir -p /mongodb/conf
mkdir -p /mongodb/log
mkdir -p /mongodb/data
上传并解压软件到指定位置
[root@db01 data]# cd /data
[root@db01 data]# tar xf mongodb-linux-x86_64-rhel70-3.6.12.tgz
[root@db01 data]# cp -r /data/mongodb-linux-x86_64-rhel70-3.6.12/bin/ /mongodb
设置目录结构权限
chown -R mongod:mongod /mongodb
设置用户环境变量
su - mongod
vi .bash_profile
export PATH=/mongodb/bin:$PATH
source .bash_profile
启动mongodb
mongod --dbpath=/mongodb/data --logpath=/mongodb/log/mongodb.log --port=27017 --logappend --fork
登录mongodb
[mongod@server2 ~]$ mongo