Toy implementation of a key-value store in Go. It's a learning exercise for me to get more familiar file IO.
New(dbName, walName) will instantiate a new KVStore. dbName is the name of the database file, and walName is the name of the write-ahead log file. The database file is a binary file that stores the key-value pairs. The write-ahead log file is a binary file that stores the operations that have been performed on the database. The database file and the write-ahead log file are both created if they don't exist.
If they do exist, the data from the files are loaded into memory. The write-ahead log file is then replayed.
These are the operations available on a KVStore:
- Flush() - flushes the write-ahead log file to disk.
- Coalesce() - coalesces the write-ahead log file and stores the data in the database file.
- Get(key) - returns the value associated with the key
- Set(key, value) - sets the value associated with the key
- Delete(key) - deletes the key-value pair associated with the key
- Close() - closes the database file and the write-ahead log file