DynamoDB versus Redis

Both DynamoDB and Redis are NoSQL databases that store the data in key-value format. But Redis is an open source database provided by BSD. Redis means Remote Dictionary Server. It is often called a data structure server as its key contains many data types, such as string hashes, in which the key and values are string, sorted sets of strings, stored sets, and lists of strings. We can perform atomic operations in Redis. Redis stores the whole dataset in memory, so we can persist it by dumping the data to disk, because Redis synchronizes data to the disk every 2 seconds. So if the system fails, we lose the data for only a few seconds. Another way to persist it is by appending each command to the log.

Redis supports master-slave replication, which allows the slave Redis server to be the same copy of the master Redis server with non-blocking replication. On the master-side server, it will handle queries when one or more slaves perform initial synchronization. On the other...