An experimental key-value storage engine written in rust.
orpheus is a key value store. It uses an in-memory BTree for indexing and a persistent log containes the raw bytes of given for values, each value is appended as UTF encoded byte array to the log file and its key, offset and length are stored in an in memory hashmap for later retreival.
Moving forward we would like to use a persistent index such as an on-disk BTree.
Compile using cargo build and run providing the relevant flags:
cargo run -- --log-path=/path/to/log/file.txt --port=<port>
orpehus runs a small server which allowes the user to interact with the engine, for example:
// Write key-value pair to the database
curl --header "Content-Type: application/json" -X POST --data '{"key":"hello", "value":"world"}' http://localhost:8000
// Retrieve value by a given key
curl --header "Content-Type: application/json" -X GET --data '{"key":"hello"}' http://localhost:8000
{"key":"hello","value":"world"}
MIT.