Copy Redis Key Directly From Redis Instance To Another Redis Instance

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If you want to move or clone your Redis instance, you can easily copy existing keys using RIOT.

Redis Input/Output Tools (RIOT) is a command-line utility designed to help you get data in and out of Redis.

1. Download RIOT wget https://github.com/redis-developer/riot/releases/download/v3.1.5/riot-standalone-3.1.5-linux-x86_64.zip

2. Unzip it unzip riot-standalone-3.1.5-linux-x86_64.zip, then go to the bin directory cd riot-standalone-3.1.5-linux-x86_64/bin

3. To copy all Redis keys to another Redis instance, use

   
   ./riot -h 192.168.1.2 -p 6379 -a "Server1RedisPass" --db 0 replicate -h 192.168.1.3 -p 6379 -a "Server2RedisPass" --db 0 --batch 10000 \
   --scan-count 10000 \
   --threads 4 \
   --read-threads 4 \
   --read-batch 500 \
   --read-queue 2000 \
   --read-pool 4 
   

4. If you want to use the export and import method

   #export all keys
   ./riot -h 192.168.1.2 -p 6379 -a "Server1RedisPass" \
   file-export /tmp/redis.json
   
   #then import all keys
   ./riot -h 192.168.1.3 -p 6379 -a "Server2RedisPass" \
   dump-import /tmp/redis.json
   

   

5. If you want to use the RIOT Docker version

   docker run fieldengineering/riot  \
   -h 192.168.1.2 -p 6379 -a "Server1RedisPass" --db 0 replicate -h 192.168.1.3 -p 6379 -a "Server2RedisPass" --db 0 --batch 1000 \
   --scan-count 10000 \
   --threads 4 \
   --read-threads 4 \
   --read-batch 500 \
   --read-queue 2000 \
   --read-pool 4 
   

   

6. If you want to copy from production (running redis instance) add --mode live

   docker run fieldengineering/riot  \
   -h 192.168.1.2 -p 6379 -a "Server1RedisPass" --db 0 replicate -h 192.168.1.3 -p 6379 -a "Server2RedisPass" --db 0 --batch 1000 \
   --scan-count 10000 \
   --threads 4 \
   --read-threads 4 \
   --read-batch 500 \
   --read-queue 2000 \
   --read-pool 4 
   --mode live
   

   If you not using --mode live, there will be error “Error executing step compare in job Replication: Verification failed”

   

References:

1. Stack Overflow - Copy all keys from one db to another in Redis