WhiteDB is a lightweight database which is known for its speed and portability across ecosystems,it operates fully in main memory. Disk is used only for dumping/restoring database and logging. Data is persistently kept in the shared memory area and is available simultaneously to all processes
Redis is a data structure server. The key features of Redis is that It is open-source, networked, in-memory, and stores keys with optional durability. Data in a key-value database has two parts: the key and the value. Because Redis can accept keys in a wide range of formats, operations can be executed on the server and reduce the client's workload. Redis is often used for caches to speed up web applications.
There has been a demand for in memory SQL solutions. Some of the best SQL in memory solutions that we have used include HSQLDB and MEMSQL. These tools are relatively new in the market and see a lot of active development. They have integrations rolled out with almost every other system that might be necessary.