Redis is an in-memory data store used to store metadata about users’ profiles, authentication information, and manifest files. It is primarily used as an application cache or quick-response database. It is designed for real-time applications such as gaming, ad-tech, and financial services. It allows you to write fewer lines of code to store, access, and use data in your applications.
In this post, we will show you how to install Redis on Fedora Linux.
Step 1 – Install Redis
By default, the Redis package is included in the Fedora default repo. You can install it using the following command.
dnf install redis -y
After the installation, start and enable the Redis service using the following command.
systemctl enable --now redis
You can check the status of the Redis service using the following command.
systemctl status redis
Output:
● redis.service - Redis persistent key-value database
Loaded: loaded (/usr/lib/systemd/system/redis.service; disabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/redis.service.d
└─limit.conf
Active: active (running) since Tue 2023-09-19 00:45:48 EDT; 14min ago
Main PID: 4066 (redis-server)
Status: "Ready to accept connections"
Tasks: 5 (limit: 2328)
Memory: 2.0M
CPU: 1.619s
CGroup: /system.slice/redis.service
└─4066 /usr/bin/redis-server 127.0.0.1:6379
Sep 19 00:45:48 fedora systemd[1]: Starting Redis persistent key-value database...
Sep 19 00:45:48 fedora systemd[1]: Started Redis persistent key-value database.
At this point, Redis is started and listens on port 6379. You can check it with the following command.
ss -antpl | grep -i redis
Output:
LISTEN 0 511 127.0.0.1:6379 0.0.0.0:* users:(("redis-server",pid=4066,fd=6))
LISTEN 0 511 [::1]:6379 [::]:* users:(("redis-server",pid=4066,fd=7))
Step 2 – Configure Redis
Redis’ default configuration file is located at /etc/redis/redis.conf. You will need to edit it to secure Redis.
nano /etc/redis/redis.conf
Change the following lines.
bind 0.0.0.0 requirepass yourpass appendonly yes appendfilename "appendonly.aof"
Save and close the file, then restart the Redis service to apply the changes.
systemctl restart redis
Step 3 – Verify Redis Connection
At this point, Redis is installed and configured. Now, connect to the Redis instance using the Redis CLI.
redis-cli
Next, authenticate Redis using a password.
127.0.0.1:6379> AUTH yourpass
Next, check the Redis connectivity.
127.0.0.1:6379> PING
Output:
PONG
Run the following command to get Redis server information.
127.0.0.1:6379> INFO Server
Output:
# Server redis_version:6.2.7 redis_git_sha1:00000000 redis_git_dirty:0 redis_build_id:63e4c6cb7f542ebb redis_mode:standalone os:Linux 5.12.8-300.fc34.x86_64 x86_64 arch_bits:64 monotonic_clock:POSIX clock_gettime multiplexing_api:epoll atomicvar_api:c11-builtin gcc_version:11.2.1 process_id:6207 process_supervised:systemd run_id:4e86466f757313d4572daf01911d9914c5cfb3ec tcp_port:6379 server_time_usec:1695099789257222 uptime_in_seconds:25 uptime_in_days:0 hz:10 configured_hz:10 lru_clock:600973 executable:/usr/bin/redis-server config_file:/etc/redis/redis.conf io_threads_active:0
Step 4 – Benchmark Redis
Redis has a built-in benchmark tool used to send a pre-defined number of requests to the server to measure performance.
Let’s run the following command to check the average number of requests per second that Redis can handle.
redis-benchmark -a yourpass -h 127.0.0.1 -q
Output:
PING_INLINE: 165837.48 requests per second PING_BULK: 156006.25 requests per second SET: 156006.25 requests per second GET: 136425.66 requests per second INCR: 155038.77 requests per second LPUSH: 173913.05 requests per second RPUSH: 139275.77 requests per second LPOP: 136798.91 requests per second RPOP: 137362.64 requests per second SADD: 149031.30 requests per second HSET: 168067.22 requests per second SPOP: 151975.69 requests per second ZADD: 170648.45 requests per second
You can also use the -c and -t options to use 20 parallel connections to run 100000 SET requests on the server:
redis-benchmark -a yourpass -h 127.0.0.1 -p 6379 -n 100000 -c 20
Output:
====== PING_INLINE ====== 100000 requests completed in 3.87 seconds 20 parallel clients 3 bytes payload keep alive: 1 host configuration "save": 3600 1 300 100 60 10000 host configuration "appendonly": yes multi-thread: no Latency by percentile distribution: 0.000% <= 0.159 milliseconds (cumulative count 2129) 50.000% <= 0.391 milliseconds (cumulative count 50188) 75.000% <= 0.503 milliseconds (cumulative count 75368) 87.500% <= 0.567 milliseconds (cumulative count 88337) 93.750% <= 0.631 milliseconds (cumulative count 93856) 96.875% <= 0.703 milliseconds (cumulative count 97127) 98.438% <= 0.751 milliseconds (cumulative count 98549) 99.219% <= 0.791 milliseconds (cumulative count 99243) 99.609% <= 0.839 milliseconds (cumulative count 99630) 99.805% <= 0.999 milliseconds (cumulative count 99808) 99.902% <= 1.279 milliseconds (cumulative count 99903) 99.951% <= 1.599 milliseconds (cumulative count 99953) 99.976% <= 2.007 milliseconds (cumulative count 99976) 99.988% <= 2.151 milliseconds (cumulative count 99988) 99.994% <= 2.687 milliseconds (cumulative count 99994) 99.997% <= 2.791 milliseconds (cumulative count 99997) 99.998% <= 2.847 milliseconds (cumulative count 99999) 99.999% <= 2.863 milliseconds (cumulative count 100000) 100.000% <= 2.863 milliseconds (cumulative count 100000)
To see the real-time latency stats for your Redis server, run the following command.
redis-cli --latency
Output:
min: 0, max: 8, avg: 0.25 (5217 samples)
Conclusion
In this post, we explained how to install the Redis server on Fedora Linux. We also showed you how to secure Redis with a password and verify its connectivity. Then, we used the redis-benchmark tool to measure the performance of the Redis server. You can now try Redis on dedicated server hosting from Atlantic.Net!
