CentOS Stream 8
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Redis 6 : Install
2021/06/28
 
Install Redis which is the In-memory Data structure store Software.
[1] Install Redis.
[root@www ~]#
dnf module -y install redis:6
[2] Configure basic settings for Redis.
[root@www ~]#
vi /etc/redis.conf
# line 68 : listening interface
# localhost only by default
# if you'd like to connect from other Hosts,
# hange to the own IP address or set to [0.0.0.0]

bind 127.0.0.1
# line 91 : listening port

port 6379
# line 224 : daemonize setting
# if you use Redis as service daemon, turn to [yes]

daemonize no
# line 275 : number of Databases
# database ID is assgined from 0 to (setting value - 1)

databases 16
# line 307 : save caching Datase on Disk
# the default settings below means like follows
# after 900 sec if at least 1 key changed
# after 300 sec if at least 10 keys changed
# after 60 sec if at least 10000 keys changed
# if you'd like to disable this function, comment out all lines fo "save ***" or specify [save ""]

save 900 1
save 300 10
save 60 10000
# line 791 : authentication password

requirepass password
# line 1089 : alternative persistence mode ("yes" means enabled)
# if enabled, Redis loses high performance but get more safety

appendonly no
# line 1118 : if enabled [appendonly yes] when wirting data on Disk
# [no] means do not fsync by Redis (just let the OS flush the data)

# appendfsync always
appendfsync everysec
# appendfsync no
# start Redis if set daemonize yes

[root@www ~]#
systemctl enable --now redis

[3] If Firewalld is running and also you use Redis as a service Daemon, allow service.
[root@www ~]#
firewall-cmd --add-service=redis --permanent

success
[root@www ~]#
firewall-cmd --reload

success
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