When storing data in main memory, gives performance benefits but it is an expensive method of data storage. An approach to realizing the benefits of in-memory storage while limiting its costs is to store the most frequently accessed data in-memory and the rest on disk. This approach is called hybrid architecture of in-memory with Disk. There are some benefits of using hybrid architecture listed below: Performance (which is enhanced by sorting, storing and retrieving specified data entirely in memory, rather than going to disk). Lower TCO from reduction in hardware investment Cost, because a less costly hard disk can be substituted for more memory. Reduced point of failure using Persistence - All data is stored and managed exclusively in RAM is at risk of being lost upon a process or server failure. So every In-memory database provide solution as a persistence to disk. This is usually act like hardening transaction log from memory to disk. Different vendor have different mec...
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