Copy all keys from one db to another in redis

Question

Instade of move I want to copy all my keys from a particular db to another. Is it possible in redis if yes than how ?

Answer 1

If you can't use MIGRATE COPY because of your redis version you might want to copy each key separately which takes longer but doesn't require you to login to the machines themselves and allows you to move data from one database to another. Here's how I copy all keys from one database to another (but without preserving ttls)

#set connection data accordingly source_host=localhost source_port=6379 source_db=0 target_host=localhost target_port=6379 target_db=1  #copy all keys without preserving ttl! redis-cli -h $source_host -p $source_port -n $source_db keys \* | while read key; do     echo "Copying $key"     redis-cli --raw -h $source_host -p $source_port -n $source_db DUMP "$key" \         | head -c -1 \         | redis-cli -x -h $target_host -p $target_port -n $target_db RESTORE "$key" 0 done 

Keys are not going to be overwritten, in order to do that, delete those keys before copying or simply flush the whole target database before starting.