Attention! The project is under intensive development. The API can still change without backwards compatibility.
A document oriented database which can store strings, BLOBs and JSON documents (as tagged structs or bytes or JSON strings) and is meant for local (non distributed) usage as it stores everything in one file or can work fully in memory. Ideally suits cli or desktop applications, non distributed pipelines or testing frameworks.
All data is stored on disk in format based on RESP encoding. But it is not exactly RESP.
LemonDB supports transactions. Reads are concurrent and writes are executed under exclusive lock.
Keys can contain any alpha-numeric characters, dashes and underscored. : can be used as key segments separators
to be used in pattern matching - like user:*.
Also, it helps correct sorting when some segments of a key are integer numbers.
Like user:123:products
Any document can be tagged by an arbitrary number of tags. Queries can use these tags for filtering and sorting of results.
Tags in LemonDB are basically secondary indexes of 4 basic types float64, int, string, boolean.
Create/open a lemonDB database file
db, closer, err := lemon.Open("./mydb.ldb")
if err != nil {
// handle
}
defer func() {
if err := closer(); err != nil {
log.Println(err)
}
}()if you pass lemon.InMemory as the first argument to lemon.Open database will
work purely as in memory database and will not persist anything to disk.
- Fetching documents by keys and extracting values
- Iterating, searching and filtering
- Inserting and updating documents
- Tags for secondary indexes
- LemonDB documents
- Github Actions
- Lazy load values
- Storage cache buffer
- LemonDB server
- lemonDB Raft