Tutorial by Examples

MMAP is a pluggable storage engine that was named after the mmap() Linux command. It maps files to the virtual memory and optimizes read calls. If you have a large file but needs to read just a small part of it, mmap() is much faster then a read() call that would bring the entire file to the memory....
WiredTiger supports LSM trees to store indexes. LSM trees are faster for write operations when you need to write huge workloads of random inserts. In WiredTiger, there is no in-place updates. If you need to update an element of a document, a new document will be inserted while the old document will...
All data is stored in-memory (RAM) for faster read/access.
A key-value engine created to integrate with Facebook's RocksDB.
A storage engine created by SanDisk that makes it possible to bypass the OS file system layer and write directly to the storage device.
A storage engine created by Percona that uses fractal tree indexes.

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