README.md

This is an implementation of the LevelDB key/value database in the Go programming language.

Installation

go get github.com/syndtr/goleveldb/leveldb

Usage

Create or open a database:

db, err := leveldb.OpenFile("path/to/db", &opt.Options{Flag: opt.OFCreateIfMissing})
...
defer db.Close()
...

Read or modify the database content:

ro := &opt.ReadOptions{}
wo := &opt.WriteOptions{}
// Remember that the contents of the returned slice should not be modified.
data, err := db.Get([]byte("key"), ro)
...
err = db.Put([]byte("key"), []byte("value"), wo)
...
err = db.Delete([]byte("key"), wo)
...

Iterate over database content:

iter := db.NewIterator(ro)
for iter.Next() {
	// Remember that the contents of the returned slice should not be modified, and
	// only valid until the next call to Next.
	key := iter.Key()
	value := iter.Value()
	...
}
iter.Release()
err = iter.Error()
...

Batch writes:

batch := new(leveldb.Batch)
batch.Put([]byte("foo"), []byte("value"))
batch.Put([]byte("bar"), []byte("another value"))
batch.Delete([]byte("baz"))
err = db.Write(batch, wo)
...

Use bloom filter:

o := &opt.Options{
	Flag:   opt.OFCreateIfMissing,
	Filter: filter.NewBloomFilter(10),
}
db, err := leveldb.OpenFile("path/to/db", o)
...
defer db.Close()
...

Documentation

You can read package documentation here.