EnvironmentConfig envConfig = new EnvironmentConfig();
envConfig.setAllowCreate(true);
envConfig.setInitializeRegions(true);

envConfig.setTransactional(true);
envConfig.setTxnNoSync(true);
envConfig.setInitializeLocking(false);

envConfig.setCacheSize(600000000);
envConfig.setInitializeCache(true);

envConfig.setErrorStream(System.err);
envConfig.setErrorPrefix("DiskIndexC5Env");

DatabaseConfig myDbConfig = new DatabaseConfig();
myDbConfig.setAllowCreate(true);
myDbConfig.setType(DatabaseType.HASH);
myDbConfig.setHashNumElements(1000000);
myDbConfig.setHashFillFactor(74);
myDbConfig.setTransactional(true);

Environment environment = new Environment(new File(path), envConfig);
Transaction transaction = environment.beginTransaction(null, null);
Database database = environment.openDatabase(transaction, "kvC5.db", "kvC5", myDbConfig);