redis安装

1、下载redis安装包并安装：https://redis.io/download

2、问题解决：

2.1）

make test
You need tcl 8.5 or newer in order to run the Redis test
make: *** [test] Error 1

1. wget http://downloads.sourceforge.net/tcl/tcl8.6.1-src.tar.gz  
2. tar xzvf tcl8.6.1-src.tar.gz  -C /usr/local/  
3. cd  /usr/local/unix/  
4. ./configure && make && make install 

2.2）

The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.

# 原因就是因为128太小了。执行echo 511 > /proc/sys/net/core/somaxconn
net.core.somaxconn=1024

2.3）

 overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect

vim /etc/sysctl.conf

# overcommit_memory is set to 0! Background save may fail under low memory condition
vm.overcommit_memory = 1

2.4）

This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.

vim /etc/rc/local

if test -f /sys/kernel/mm/transparent_hugepage/enabled; then
    echo never > /sys/kernel/mm/transparent_hugepage/enabled
fi

2.5）

Increased maximum number of open files to 10032 (it was originally set to 1024)

[root@rehl6-A1 etc]# ulimit -n
1024

https://stackoverflow.com/questions/36880321/why-redis-can-not-set-maximum-open-file