czmgygyw / minibase

An embedded KV storage engine for learning HBase

MiniBase is an embedded KV storage engine, it's quit simple, not for production env, just for better understand HBase or other LSM-related index algorithm.

In MiniBase, we use those basic algorithm and data structure:

• BloomFilter: it can helps a lot when filtering much useless IO.
• ConcurrentSkipListMap: Yeah, it's quite suitable when designing memstore. It can maintian an sorted key value set in high concurrency scenarios.
• LSM Index Algorithm: the memstore part and disk store part.

How to use ?

Config conf = new Config().setDataDir(dataDir).setMaxMemstoreSize(1).setFlushMaxRetries(1)
    .setMaxDiskFiles(10);
MiniBase db = MiniBaseImpl.create(conf).open();

// Put
db.put(Bytes.toBytes(1), Bytes.toBytes(1));

// Scan
Iter<KeyValue> kv = db.scan();
while (kv.hasNext()) {
    KeyValue kv = kv.next();
    //...
}

How to build and test?

git clone [email protected]:openinx/minibase.git
mvn clean package