We turn on Ignite's native persistence to store data on disk. Ignite keeps a subset of the data in memory and a superset on disk. If a cache has N entries and it is configured to keep only X objects in memory (X < N), then X-N objects are stored on disk.
The following are the advantages of native persistence:
- You can run distributed SQL queries over the full dataset, which spans both memory and disk.
- You don't have to worry about the size of the data and indexes in RAM. Ignite allows you to keep only the frequently used dataset in memory; the rest of the data can be stored on disk.
- When the entire cluster goes down and you restart it, the third-party persistence needs to preload the data and warm up the memory ...
