You can transfer any data in the form of text between your servers, you can program it to execute a set of instructions on the server depending on the redis message, etc. This can be used for making scripts that sync data between all servers and much more!
You only need to have matching configuration in every server for communication and a Redis server to connect to. I recommend using VPS for hosting redis server, I personally use VPS from humbleservers.com.
#EncryptMessages may be useful if you cannot use TLS due to use of older version of Redis or if you're paranoid about privacy and want to double encrypt your messages
#however this will not encrypt the initial authentication password, only the messages sent (use TLS for initial authentication password encryption)
#the encryption configuration must be the same across all servers in order to communicate
#use 16 characters long key for AES-128 encryption
#32 characters long key for AES-256 encryption
#AES-128 is faster, but less secure (but it is not crackable by today's technology as of 2020, may be crackable by quantum computers)
#the AES implementation used in RediSkript uses SIV mode, which makes the same key resistant to cracking for a big count of messages without the need of changing the key very often
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