What tools to backup Redis RDB?

Question

Redis

I am not an admin.
There is a task to backup the Redis database. The base is big.
Running one huge file over the network every day is not an option.
What tool to choose to calculate the difference between two copies of the database, make a delta (as in git) and already form it as a backup?
I may have misread the doc, but rsync, rsnapshot, rdiff-backup only determine which files have been changed/added. And already considers them as a backup.
But in my case there is only one file. And it naturally changes every day.
Help to understand and advise the best solution in your opinion.
Thank you.

Answer 1

radish can't do incremental backups https://github.com/antirez/redis/issues/4070
I'm almost sure that it changes quite a lot and especially the diff will not help here, or it will be very large.

Answer 2

The order might be:

1. backing up locally
   
2. backing up a copy using deduplication (bup, ZBackup, attic, etc.) to a remote server. Subsequent backups will retain only the delta, not the entire copy.
   
3. delete local copy
   

Answer 3

По итогу заюзал xdelta для подсчета разницы между двумя бинарными rdb файлами.
Сама база около 7 Гб, ежедневная дельта выходит около 30мб, мне нормально.