| This configuration helps you configure components using Redis. This so far only includes optional rate limiting component. |
| |
| Consult this link:https://github.com/apache/james-project/blob/fabfdf4874da3aebb04e6fe4a7277322a395536a/server/mailet/rate-limiter-redis/redis.properties[example] |
| to get some examples and hints. |
| |
| == Redis Configuration |
| |
| .redis.properties content |
| |=== |
| | Property name | explanation |
| |
| | redisURL |
| | the Redis URI pointing to Redis server. Compulsory. The value must fit redis.topology |
| |
| Reference: https://github.com/redis/lettuce/wiki/Redis-URI-and-connection-details |
| |
| | redis.topology |
| | Redis server topology. Defaults to standalone. Possible values: standalone, cluster, master-replica, sentinel |
| |
| | redis.readFrom |
| | The property to determine how Lettuce routes read operations to Redis server with topologies other than standalone. Defaults to master. Possible values: master, masterPreferred, replica, replicaPreferred, any |
| |
| Reference: https://github.com/redis/lettuce/wiki/ReadFrom-Settings |
| |
| | redis.sentinelPassword |
| | Redis sentinel password. If not specified, the redis driver will not set password for sentinel. |
| |
| | redis.ioThreads |
| | IO threads to be using for the underlying Netty networking resources. If unspecified driver defaults applies. |
| |
| | redis.workerThreads |
| | Worker threads to be using for the underlying driver. If unspecified driver defaults applies. |
| |=== |
| |
| == Enabling Multithreading in Redis |
| |
| Redis 6 and later versions support multithreading, but by default, Redis operates as a single-threaded process. |
| |
| On a virtual machine with multiple CPU cores, you can enhance Redis performance by enabling multithreading. This can significantly improve I/O operations, particularly for workloads with high concurrency or large data volumes. |
| |
| See link:https://redis.io/docs/latest/operate/oss_and_stack/management/config-file/[THREADED I/O section]. |
| |
| Example if you have a 4 cores CPU, you can enable the following lines in the `redis.conf` file: |
| .... |
| io-threads 3 |
| io-threads-do-reads yes |
| .... |
| |
| However, if your machine has only 1 CPU core or your Redis usage is not intensive, you will not benefit from this. |
