Source: zaynkorai.medium.com
Redis for DevOps Engineers
At least once in DevOps/SRE career you may have deployed Redis or worked on it. Redis is open source key-value store and it is mostly used for Cache but Redis is much more than a cache. It has in-memory data structure store, used as a database, cache, and message broker.
If you are using Redis version lower than 4.0 consider upgrading it to higher.Disable Swap CompletelyIf an operating system has SWAP configured — it can dump some Redis’ data to the disk and later when Redis will try to access them — it can take a long time to read them back to the memory.sysctl -w vm.swappiness=0More Cores != Better++Redis is a single threaded process and will, at most, consume two cores if you have persistence enabled.
Redis Cluster allows you to break apart keys amongst sets of given masters/slaves based on key ranges.If clustering is not an option, consider namespacing and distributing your keys among multiple instances.An amazing write-up on partitioning your data can be found on the redis.io website here.
If you are using Redis version lower than 4.0 consider upgrading it to higher.Disable Swap CompletelyIf an operating system has SWAP configured — it can dump some Redis’ data to the disk and later when Redis will try to access them — it can take a long time to read them back to the memory.sysctl -w vm.swappiness=0More Cores != Better++Redis is a single threaded process and will, at most, consume two cores if you have persistence enabled.
Redis Cluster allows you to break apart keys amongst sets of given masters/slaves based on key ranges.If clustering is not an option, consider namespacing and distributing your keys among multiple instances.An amazing write-up on partitioning your data can be found on the redis.io website here.
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