REDIS

Redis

Redis is a structure used as a mesaj broker, keep data in memory, caching and as a database. Redis support more than one data types. Using Redis, you keep data permanently, get it’s replica and use lua script. Also Redis provide high availability via redis sentinel and automatically data partitioning with redis cluster.
Redis works fast because it uses memory to keep data. Also depends in your case, you can persist your data in your system with periodicaly dumping.
You can use redis with programming languages. You can see supportting languages in this link.

Redis Installation

In this topic will explain redis installation on linux server. To do this we need redis installation files and a few commands.You can install th redis by following the commands below. Also this intallastion will do on Rhel8 OS platform. You can use below command to install on Rhel7 OS platform.

Step1:
We will install the redis5 kiversion.To do this obtain the redis installation files with command below.

wget https://download.redis.io/releases/redis-5.0.10.tar.gz

Step2:
Decompress the dowlanded files.

tar -zxvf redis-5.0.10.tar.gz

Step3:
Go opened redis source code folder and complie source code. Before complie you make sure be installed neccassary packages. To do this you should install “Development Tools”.

yum group install "Development Tools"
cd redis-5.0.10
make
make install

Step4:
Create redis working directory, service file and other settings with command below

mkdir /etc/redis
cp redis.conf /etc/redis/redis.conf
vim /etc/redis/redis.conf

You should change below settings in redis.conf file.

daemonize no
supervised systemd
logfile /var/log/redis/redis.log
vim /usr/lib/systemd/system/redis.service
[Unit]
Description=Redis persistent key-value database
After=network.target
[Service]
ExecStart=/usr/local/bin/redis-server /etc/redis/redis.conf --supervised systemd
ExecStop=/usr/local/bin/redis-cli shutdown
Type=notify
User=redis
Group=redis
RuntimeDirectory=redis
RuntimeDirectoryMode=0755
[Install]
WantedBy=multi-user.target
mkdir /var/lib/redis
mkdir /var/log/redis/

Step4:
Redis user add and change folder permission.

useradd redis
chown -R redis:redis /etc/redis /var/lib/redis /var/log/redis/ /usr/lib/systemd/system/redis.service

Step5:
Enable redis service and check redis service status

systmctl daemon-reload
systemctl enable redis
systemctl start redis
systemctl status redis
Redis Service Status

If i enough time, I will write continue.

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