MongoDB相關
- mongoDB 和 redis 一樣 都是 鍵值存儲，現持久化使用的redis,慮支持mongoDB 防止服務器的宕機玩家回檔。
MongDB安裝
選擇在 CentOS7.x系列上安裝
1.下載地址:
https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-3.2.9.tgz
2.下載：
wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-3.2.9.tgz
3.解壓:
tar xvf mongodb-linux-x86_64-rhel70-3.2.9.tgz
4.重命名:
mv mongodb-linux-x86_64-rhel70-3.2.9 mongodb
5.拷貝到安裝目錄:
\cp -rf mongodb /usr/local/mongodb
6.增加環境變量:
vim /etc/profile
加入:
if [ -d /usr/local/mongodb/bin ]; then
export PATH=$PATH:/usr/local/mongodb/bin/
fi
運行生效:
source /etc/profile
7.創建數據庫文件目錄:
阿里云的ssd 默認掛載 在/alidata1目錄下
mkdir -p /alidata1/dbdata/mongodb/db
8.禁用 Transparent Huge Pages (THP) 透明頁
默認centos7 系統
查看透明頁是否開啟
RHEL使用:
cat /sys/kernel/mm/redhat_transparent_hugepage/enabled
CentOS 和其他系統使用:
cat /sys/kernel/mm/transparent_hugepage/enabled
返回:
[always] madvise never
always:開啟
madvise:警示
never:關閉
臨時禁用：
echo never >/sys/kernel/mm/transparent_hugepage/defrag
echo never >/sys/kernel/mm/transparent_hugepage/enabled
永久禁用：
方法1:
在grub中禁用
vim /etc/grub.conf
transparent_hugepage=never
方法2:
使用mongodb官網的腳本
在/etc/init.d/創建 disable-transparent-hugepages
vim /etc/init.d/disable-transparent-hugepages
=====>>
#!/bin/sh
### BEGIN INIT INFO
# Provides: disable-transparent-hugepages
# Required-Start: $local_fs
# Required-Stop:
# X-Start-Before: mongod mongodb-mms-automation-agent
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Disable Linux transparent huge pages
# Description: Disable Linux transparent huge pages, to improve
# database performance.
### END INIT INFO
case $1 in
start)
if [ -d /sys/kernel/mm/transparent_hugepage ]; then
thp_path=/sys/kernel/mm/transparent_hugepage
elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then
thp_path=/sys/kernel/mm/redhat_transparent_hugepage
else
return 0
fi
echo 'never' > ${thp_path}/enabled
echo 'never' > ${thp_path}/defrag
unset thp_path
;;
esac
賦予運行權限
chmod 755 /etc/init.d/disable-transparent-hugepages
Ubuntu and Debian
sudo update-rc.d disable-transparent-hugepages defaults
SUSE
sudo insserv /etc/init.d/disable-transparent-hugepages
Red Hat, CentOS, Amazon Linux, and derivatives
sudo chkconfig --add disable-transparent-hugepages
查看 運行 chkconfig
Note: This output shows SysV services only and does not include native
systemd services. SysV configuration data might be overridden by native
systemd configuration.
If you want to list systemd services use 'systemctl list-unit-files'.
To see services enabled on particular target use
'systemctl list-dependencies [target]'.
aegis 0:off 1:off 2:on 3:on 4:on 5:on 6:off
agentwatch 0:off 1:off 2:on 3:on 4:on 5:on 6:off
disable-transparent-hugepages 0:off 1:off 2:on 3:on 4:on 5:on 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
redis_6379 0:off 1:off 2:on 3:on 4:on 5:on 6:off
修改tuned 和ktune
使用centos7:
創建目錄
sudo mkdir /etc/tuned/no-thp
修改配置
vim /etc/tuned/no-thp/tuned.conf
輸入
#include=virtual-guest
include=throughput-performance
[vm]
transparent_hugepages=never
顯示 配置 看是否有no-thp
tuned-adm list
切換模式
tuned-adm profile no-thp
centos7 檢測 開啟情況
cat /sys/kernel/mm/transparent_hugepage/enabled
cat /sys/kernel/mm/transparent_hugepage/defrag
或者：
cat /sys/kernel/mm/redhat_transparent_hugepage/enabled
cat /sys/kernel/mm/redhat_transparent_hugepage/defrag