@Override
    public void shutdown() {
        this.writeLock.lock();
        try {
            closeDatabase();
            LOG.info("BDBLogStorage shutdown, the db path is: {}.", this.homePath);
        } finally {
            this.writeLock.unlock();
        }
    }
First log index and last log index key in configuration column family.
jraft-extension/bdb-log-storage-impl/src/main/java/com/alipay/sofa/jraft/storage/impl/BDBLogStorage.java