Alibaba Group Holding Limited
Data storage method, apparatus, and device for multi-layer blockchain-type ledger

Abstract:

Computer-implemented methods, non-transitory, computer-readable media, and computer-implemented systems for data storage. One computer-implemented method includes: obtaining a data block from a previous blockchain-type ledger in multi-level blockchain-type ledgers, where in the multi-level blockchain-type ledgers comprise a bottom-layer blockchain-type ledger and at least one higher-layer blockchain-type ledger; determining a block height of the data block and a root hash of a Merkel tree constructed by data records in the data block; constructing updated data records comprising the root hash and the block height; and recording the updated data records in a data block in a current blockchain-type ledger in the multi-level blockchain-type ledgers a level higher than the previous blockchain-type ledger.