CN110489495A - A kind of block chain snapshot production method based on modification collection - Google Patents
A kind of block chain snapshot production method based on modification collection Download PDFInfo
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- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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Abstract
The present invention discloses a kind of block chain Snapshot Method based on modification collection, is related to block chain technology, transaction execution field.This method specifically: record all status data changes in block chain implementation procedure first, obtain modification collection, later when needing to carry out snapshot, world state can be initialized, the modification of application block status data collects one by one according to block sequence, obtains final world state, calculate the Hash of final world state, it is compared with the Hash in corresponding block, unanimously then makes snapshot success, it is inconsistent, make snapshot failure.The present invention solves the problems, such as that traditional block chain can not carry out snapshot or snapshot operation limits very big, improves the availability and scalability of block chain, increases practicability.
Description
Technical field
The present invention relates to block chain technology, transaction execution field more particularly to a kind of block chain snapshots based on modification collection
Production method.
Background technique
Block chain technology, block chain are a kind of novel decentralization agreements, can safely store digital cash transaction or its
His data, information can not be forged and be distorted, and the trade confirmation on block chain is completed jointly by all nodes on block chain.And area
The feature of block chain limit its data volume be can only be ever-increasing, and in order to guarantee availability, the expansibility of block chain, fastly
According to being indispensable function.However current block catenary system does not support snapshot functions or snapshot functions more inflexible,
This situation is unfavorable to the development of block chain.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide it is a kind of based on modification collection block chain Snapshot Method,
It is able to ascend availability, the scalability of block chain, increases the practicality.
The present invention is achieved by the following technical solutions: a kind of block chain snapshot production method based on modification collection, should
Method specifically comprises the following steps:
(1) in the implementation procedure of entire block chain, the change of all status datas is recorded, and by the change of all status datas
Persistent storage obtains modification collection；
(2) when block chain receives snapshot request, judge whether snapshot target block number is legal, such as generated corresponding block
Snapshot, it is as illegal, snapshot production failure；Snapshot as do not generated corresponding block, it is as legal, then carry out snapshot
It generates；
(3) initialization world state is repaired according to block sequence using the block world state from first block to target block
Change collection, obtains final world state；
(4) Hash for calculating final world state, compares with the Hash in corresponding block, and unanimously then snapshot is successful,
Inconsistent then snapshot production failure.
Further, when step 2 receives snapshot request, if snapshot target block number is also not carried out, this is requested
Caching, when block chain goes to this block, carries out the production of snapshot.
Further, when step 3 initialization world state, if having existed prefix area block number corresponding snapshot, i.e.,
The world state of corresponding block number is obtained using this snapshot, and the application block world state modification collection on this world state, obtain
Obtain snapshot corresponding to target area block number.
Further, it needs to carry out unified brush using batch processing when application block world state modification collection in step 3
Enter.
Further, in entire block chain snapshot manufacturing process, snapshot request that persistence cannot be handled in time.
The beneficial effects of the present invention are: a kind of block chain Snapshot Method based on modification collection of the invention is executed in block chain
In the process, it will block chain world state is changed in the execution that parsing trades and trades in virtual machine.In change procedure
In, all changes are successively recorded, the modification collection of All Activity can be obtained.When making the snapshot of block chain, from block
The original state of chain starts, and successively all world states of application modify collection, it will be able to obtain the world at any one time point
State, so that the production of world state becomes simple controllable free.The present invention solve traditional block chain can not carry out snapshot or
Person's snapshot operation limits very big problem, allows block catenary system during data are ever-increasing, does not need offline
Carry out data snapshot, and can to any one block carry out snapshot production, improve block catenary system availability and can
Scalability increases the practicality.
Detailed description of the invention
Fig. 1 is the flow chart of the block chain Snapshot Method of the invention based on modification collection.
Specific embodiment
Below according to attached drawing and preferred embodiment the present invention is described in detail, the objects and effects of the present invention will become brighter
White, below in conjunction with drawings and examples, the present invention will be described in further detail.It should be appreciated that described herein specific
Embodiment is only used to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, for a kind of flow chart of the block chain snapshot production method based on modification collection of the present invention, this method tool
Body includes the following steps:
(1) in the implementation procedure of entire block chain, as unit of block, status data caused by All Activity in block is recorded
Change, and the change record of these status datas (i.e. the old value of state and new value) is packaged, persistent storage is modified
Collection.
(2) when block chain receives snapshot request, judge whether snapshot target block number is legal, such as generated corresponding
The snapshot of block, as illegal, snapshot production failure；Snapshot as do not generated corresponding block, it is as legal, then it carries out fast
According to generation.When receiving snapshot request, if snapshot target block number is also not carried out, this request is cached, block is worked as
When chain goes to this block, then carry out the production of snapshot.
(3) when the snapshot there is no preposition block did not always carry out snapshot, world state is initialized,
According to block sequence, collection is modified using the world state from first block to target block, obtains final world state.And such as
When fruit has existed the snapshot of preposition block, then the world state of corresponding block number is obtained using this snapshot, and on this basis
Collection is modified using the world state of subsequent block, to avoid whole applications to modification collection, improves the production of block chain snapshot
Efficiency.When application block world state is modified and collected, need to carry out unified brush using batch processing to enter, to guarantee world's shape
The atomicity of state.
(4) the identical world state Hash calculation method of use and normal blocks chain processing logic, such as Merkel tree or
Increment Hash calculates the Hash of final world state, compares with the Hash in corresponding block, unanimously then snapshot is fabricated to
Function, inconsistent then snapshot production failure.
In the implementation process of the block chain Snapshot Method entirely based on modification collection, need persistence that cannot handle in time
Snapshot request, after preventing system failure from restarting, the loss of snapshot request guarantees the usage experience of user.
The block chain snapshot obtained by this method allows block catenary system during data are ever-increasing, is not required to
Data snapshot can be carried out by wanting offline, and the production of snapshot can be carried out to any one block, improve block catenary system
Availability and scalability, increase the practicality.
It will appreciated by the skilled person that being not used to limit the foregoing is merely the preferred embodiment of invention
System invention, although invention is described in detail referring to previous examples, for those skilled in the art, still
It can modify to the technical solution of aforementioned each case history or equivalent replacement of some of the technical features.It is all
Within the spirit and principle of invention, modification, equivalent replacement for being made etc. be should be included within the protection scope of invention.
Claims (5)
1. a kind of block chain snapshot production method based on modification collection, which is characterized in that this method specifically comprises the following steps:
(1) in the implementation procedure of entire block chain, the change of all status datas is recorded, and by the change of all status datas
Persistent storage obtains modification collection；
(2) when block chain receives snapshot request, judge whether snapshot target block number is legal, such as generated corresponding block
Snapshot, it is as illegal, snapshot production failure；Snapshot as do not generated corresponding block, it is as legal, then carry out snapshot
It generates；
(3) world state is initialized, according to block sequence, is modified using the world state from first block to target block
Collection, obtains final world state；
(4) Hash for calculating final world state, compares with the Hash in corresponding block, unanimously then makes snapshot success,
It is inconsistent, make snapshot failure.
2. block chain snapshot production method according to claim 1, which is characterized in that when step 2 receives snapshot request, if
Snapshot target block number is also not carried out, then caches this request, when block chain goes to this block, carry out the system of snapshot
Make.
3. block chain snapshot production method according to claim 1, which is characterized in that when step 3 initializes world state, such as
When fruit has existed prefix area block number corresponding snapshot, i.e., the world state of corresponding block number is obtained using this snapshot, and herein
Application block world state modification collection, obtains snapshot corresponding to target area block number on world state.
4. according to claim 1 or the 3 block chain snapshot production methods, which is characterized in that application block world shape in step 3
When state modification collection, need to carry out unified brush using batch processing to enter.
5. block chain snapshot production method according to claim 1, which is characterized in that in entire block chain snapshot manufacturing process
In, snapshot request that persistence cannot be handled in time.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111737276A (en) * | 2020-07-17 | 2020-10-02 | 支付宝(杭州)信息技术有限公司 | Method and system for modifying block chain data |
| CN112988469A (en) * | 2021-04-27 | 2021-06-18 | 支付宝(杭州)信息技术有限公司 | State backup method and device in alliance chain and electronic equipment |
| CN113994324A (en) * | 2020-10-27 | 2022-01-28 | 支付宝(杭州)信息技术有限公司 | Block chain system with efficient world state data structure |
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| CN112988469A (en) * | 2021-04-27 | 2021-06-18 | 支付宝(杭州)信息技术有限公司 | State backup method and device in alliance chain and electronic equipment |
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