Redis

• trivago article about redis usage in production: https://tech.trivago.com/post/learn-redis-the-hard-way/

Commands

• check memory stats: info memory
• check replication (see if node is master or slave): info replication
• create slave: SLAVEOF <ip> <port>
• promote slave to master: SLAVEOF NO ONE
• general info (cpu, mode, key number>): info
• list keys: keys * (NEVER use this command in production!)
• set key: set key_name key_value
• get key contents: get key_name

latency monitoring

• turn on latency monitoring: CONFIG SET latency-monitor-threshold <value>
• latency commands:
• LATENCY LATEST - returns the latest latency samples for all events.
• LATENCY HISTORY - returns latency time series for a given event.
• LATENCY RESET - resets latency time series data for one or more events.
• LATENCY GRAPH - renders an ASCII-art graph of an event's latency samples.
• LATENCY DOCTOR - replies with a human-readable latency analysis report.

Common config

protected-mode no
#bind 127.0.0.1 -::1 (comment this line)

Cluster

Configs for cluster:

protected-mode no
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 15000
appendonly yes

• create cluster: redis-cli --cluster create node_1_ip:node_1_port node_2_ip:node_2_port ... --cluster-replicas 1

Master - Slave

Slave config

replicaof ip port