Blockchain-based data migration method and apparatus

1. A computer-implemented method, comprising:

receiving, at a blockchain node device, a latest block associated with a blockchain, wherein the blockchain node device includes a first storage system and a second storage system, and wherein the second storage system is interconnected with the first storage system;

storing, at the blockchain node device and in the first storage system, the latest block;

determining, by the blockchain node device, whether a migration trigger event for blockchain data stored in the first storage system is detected, including determining whether the blockchain data stored in the first storage system satisfies a predetermined data migration rule, wherein the blockchain data includes at least one of total blockchain block data, transaction digest value data in each block, block digest value data in each block, or historical status data in a block that includes a historical value of transaction status on the blockchain, and wherein the predetermined data migration rule specifies a predetermined data capacity of the blockchain data stored in the first storage system or specifies a predetermined capacity ratio of the data capacity of the blockchain data stored in the first storage system relative to a total data capacity of the first storage system exceeds a predetermined threshold; and

in response to a determination that the migration trigger event is detected, migrating, to the second storage system in an ascending order of block heights, the blockchain data stored in the first storage system and exists prior to a migration reference time.

2. The computer-implemented method of claim 1 , wherein the first storage system is a centralized storage system, and wherein the second storage system is a distributed storage system including a coordinator node and a plurality of storage cluster nodes.

3. The computer-implemented method of claim 2 , further comprising:

successively allocating, by the coordinator node, blockchain data of the blockchain that is migrated to the plurality of storage cluster nodes of the second storage system.

4. The computer-implemented method of claim 3 , wherein successively allocating the blockchain data comprises:

migrating the blockchain data of the blockchain migrated to the second storage system to a first storage cluster node of the second storage system in an ascending order of block heights; and

if a storage capacity of the first storage cluster node exceeds a predetermined capacity threshold, iteratively migrating remaining blockchain data to a next storage cluster node of the second storage system in ascending order of block heights.

5. The computer-implemented method of claim 1 , wherein migrating blockchain data comprises invoking a data migration utility in the blockchain to migrate the blockchain data that is stored in the first storage system and that exists before the migration reference time to the second storage system.

6. The computer-implemented method of claim 1 , wherein migrating blockchain data comprises:

invoking a smart contract that triggers data migration in the blockchain; and

executing data migration logic included in the smart contract to migrate the blockchain data that is stored in the first storage system and that exists before the migration reference time to the second storage system.

7. A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

receiving, at a blockchain node device, a latest block associated with a blockchain, wherein the blockchain node device includes a first storage system and a second storage system, and wherein the second storage system is interconnected with the first storage system;

storing, at the blockchain node device and in the first storage system, the latest block;

determining, by the blockchain node device, whether a migration trigger event for blockchain data stored in the first storage system is detected, including determining whether blockchain data stored in the first storage system satisfies a predetermined data migration rule, wherein the blockchain data includes at least one of total blockchain block data, transaction digest value data in each block, block digest value data in each block, or historical status data in a block that includes a historical value of transaction status on the blockchain, and wherein the predetermined data migration rule specifies a predetermined data capacity of the blockchain data stored in the first storage system or specifies a predetermined capacity ratio of the data capacity of the blockchain data stored in the first storage system relative to a total data capacity of the first storage system exceeds a predetermined threshold; and

in response to a determination that the migration trigger event is detected, migrating, to the second storage system in an ascending order of block heights, the blockchain data stored in the first storage system and exists prior to a migration reference time.

8. The non-transitory, computer-readable medium of claim 7 , wherein the first storage system is a centralized storage system, and wherein the second storage system is a distributed storage system including a coordinator node and a plurality of storage cluster nodes.

9. The non-transitory, computer-readable medium of claim 8 , further comprising:

successively allocating, by the coordinator node, blockchain data of the blockchain that is migrated to the plurality of storage cluster nodes of the second storage system.

10. The non-transitory, computer-readable medium of claim 9 , wherein successively allocating the blockchain data comprises:

migrating the blockchain data of the blockchain migrated to the second storage system to a first storage cluster node of the second storage system in an ascending order of block heights; and

if a storage capacity of the first storage cluster node exceeds a predetermined capacity threshold, iteratively migrating remaining blockchain data to a next storage cluster node of the second storage system in ascending order of block heights.

11. The non-transitory, computer-readable medium of claim 7 , wherein migrating blockchain data comprises invoking a data migration utility in the blockchain to migrate the blockchain data that is stored in the first storage system and that exists before the migration reference time to the second storage system.

12. The non-transitory, computer-readable medium of claim 7 , wherein migrating blockchain data comprises:

invoking a smart contract that triggers data migration in the blockchain; and

executing data migration logic included in the smart contract to migrate the blockchain data that is stored in the first storage system and that exists before the migration reference time to the second storage system.

13. A computer-implemented system, comprising:

one or more computers; and

one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform one or more operations comprising:

receiving, at a blockchain node device, a latest block associated with a blockchain, wherein the blockchain node device includes a first storage system and a second storage system, and wherein the second storage system is interconnected with the first storage system;

storing, at the blockchain node device and in the first storage system, the latest block;

determining, by the blockchain node device, whether a migration trigger event for data stored in the first storage system is detected, including determining whether blockchain data stored in the first storage system satisfies a predetermined data migration rule, wherein the blockchain data includes at least one of total blockchain block data, transaction digest value data in each block, block digest value data in each block, or historical status data in a block that includes a historical value of transaction status on the blockchain, and wherein the predetermined data migration rule specifies a predetermined data capacity of the blockchain data stored in the first storage system or specifies a predetermined capacity ratio of the data capacity of the blockchain data stored in the first storage system relative to a total data capacity of the first storage system exceeds a predetermined threshold; and

in response to a determination that the migration trigger event is detected, migrating, to the second storage system in an ascending order of block heights, the blockchain data stored in the first storage system and exists prior to a migration reference time.

14. The computer-implemented system of claim 13 , wherein the first storage system is a centralized storage system, and wherein the second storage system is a distributed storage system including a coordinator node and a plurality of storage cluster nodes.

15. The computer-implemented system of claim 14 , further comprising:

successively allocating, by the coordinator node, blockchain data of the blockchain that is migrated to the plurality of storage cluster nodes of the second storage system.

16. The computer-implemented system of claim 15 , wherein successively allocating the blockchain data comprises:

migrating the blockchain data of the blockchain migrated to the second storage system to a first storage cluster node of the second storage system in an ascending order of block heights; and

if a storage capacity of the first storage cluster node exceeds a predetermined capacity threshold, iteratively migrating remaining blockchain data to a next storage cluster node of the second storage system in ascending order of block heights.

17. The computer-implemented system of claim 13 , wherein migrating blockchain data comprises invoking a data migration utility in the blockchain to migrate the blockchain data that is stored in the first storage system and that exists before the migration reference time to the second storage system.