Crunch

Crunch is an LSM-tree storage engine, and will eventually also have an actual NoSQL database built on top of it.

This is a hobbyist project; it is not meant for serious use.

Environment Variables

Types

These type placeholders are used throughout the environment variable table:

Type	Accepted Value(s)
bool	true | 1 | false | 0
uint	Integer value >= 0

Variables

Variable Name	Description	Accepted Value(s)
CRUNCH_MEMTABLE__CAPACITY	The number of key-value pairs that the memtable can hold before it flushes to disk	<number>
CRUNCH_STORE__COMPACTION_ENABLED	Whether the background thread to perform compaction should run.	<bool>
CRUNCH_STORE__COMPACTION_INTERVAL_SECONDS	The number of seconds between compaction runs.	<number>

Usage

Right now, if you run cargo run you will get a REPL type interface for setting key-value pairs directly in the engine. This is useful for development, but eventually the database will run as its own server and allow arbitrary clients to communicate with it over the network.