Blockchain from the perspective of Technology

1. blockchain does not belong to any instry. Blockchain is a new application mode of computer technology, such as distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and so on. In a narrow sense, blockchain is a kind of chain data structure that combines data blocks in a sequential way according to the time sequence, and it is a distributed account book that can not be tampered with and forged by means of cryptography.

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From the perspective of technology and architecture, I will tell you my understanding of blockchain in common language

what is blockchain? In a word, blockchain is a storage system. To be more specific, blockchain is a distributed storage system without an administrator and each node has all the data

What are the common storage systems like

first, how to ensure high availability

the common storage system usually uses "rendancy" to solve the problem of high availability. As shown in the figure above, if the data can be copied into several copies and rendant to multiple places, high availability can be guaranteed. The data in one place is hung, and there is data in other places. For example, the master-slave cluster of MySQL is the same principle, and the raid of disk is also the same principle

two points need to be emphasized in this place are: data rendancy often leads to consistency problems

1. For example, in the master-slave cluster of MySQL, there is actually a delay in reading and writing, which means there is a inconsistency in reading and writing in a short period of time. This is a side effect of data rendancy

The second point is that data rendancy often reces the efficiency of writing, because data synchronization also consumes resources. If you add two slave libraries, the write efficiency will be affected. The common storage system is to use rendancy to ensure the high availability of data

so the second question, ordinary storage system, can write more

the answer is yes, for example, take this graph as an example:

in fact, MySQL can do a master-slave synchronization of al masters, master-slave synchronization of al masters, two nodes can be written at the same time. If you want to do a multi room multi live data center, in fact, multi room multi live data synchronization. What we should emphasize here is that multi-point writing often leads to the consistency problem of writing conflicts. Take MySQL as an example, suppose that the attribute of a table is self incrementing ID, then the data in the database is 1234 now. If one of the nodes writes and inserts a piece of data, it may become 5, and then these 5 pieces of data are synchronized to another master node, Before synchronization, if another write node inserts a piece of data, a piece of data with self incrementing ID of 5 will be generated. Then, after the generation, synchronize to another node, and the synchronized data will conflict with the two local 5's after it arrives, which will lead to synchronization failure and write consistency conflict. This problem will occur in the case of multi-point writing

how to ensure consistency in multi-point writing

the reform "Swan class" gives you more technical work

3. The definition of Chongqing jinwowo analysis blockchain technology is as follows:
1. Blockchain is a distributed database (system) placed in a non secure environment
2. The blockchain uses cryptography to ensure that the existing data cannot be tampered with
3, the blockchain uses consensus algorithm to reach consensus on new data
the system with the above three properties is blockchain.

4. If you have invested more than 200000 yuan, and now it shows that the withdrawal is successful, but the money is not in the account, you can only sue the company and ask the company to pay the account
you can't pay back the money you owe
first, there are several steps in the process of court prosecution for non repayment of arrears

there are five steps in the process of court prosecution for non repayment of arrears. The ordinary procere shall be concluded within six months. According to the provisions of the civil procere law, if a creditor requests the debtor to pay money or securities, he may apply to the basic court with jurisdiction for a payment order if the following conditions are met: there is no other debt dispute between the creditor and the debtor; The payment order can be served on the debtor< The general procere of prosecution is as follows:

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2. Bring evidence and indictment to the court and pay litigation costs

3. The court will hold a trial after examining and confirming the acceptance

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the trial time of civil cases: the summary procere shall be concluded within three months< Second, how to sue if you don't owe money

according to the provisions of the civil procere law, if the creditor requests the debtor to pay money or securities, he can apply to the basic court with jurisdiction for a payment order if the following conditions are met: there is no other debt dispute between the creditor and the debtor; The payment order can be served on the debtor

if the debtor fails to pay off the debt or raise a written objection to the court within 15 days after receiving the payment order issued by the court, the creditor can apply to the court for compulsory execution< (3) can you call the police if you still owe money

the case of non repayment of money in arrears is a civil dispute, which is not under the jurisdiction of the public security organ and can not be reported to the police for handling. However, the parties can settle the debt dispute through negotiation. If the negotiation fails, they can bring a lawsuit to the court and settle the dispute through the court< Article 3 the provisions of this Law shall apply to the court's acceptance of civil lawsuits brought by citizens, legal persons, other organizations and between them e to property relations and personal relations< Article 21 a civil action against a citizen shall be under the jurisdiction of the court in the place where the defendant has his domicile; If the defendant's domicile is different from his habitual residence, the court of habitual residence shall have jurisdiction over it

a civil action against a legal person or other organization shall be under the jurisdiction of the court in the place where the defendant has his domicile

if several defendants in the same lawsuit have their domicile or habitual residence in more than two courts, each court shall have jurisdiction.

5. Chongqing jinwowo: from a technical point of view, a block is a retrievable and tamperable data structure. Each block includes block head information and block body.

6. The analysis of jinwowo network technology is as follows from the narrow and broad perspectives:
in the narrow sense, blockchain is a kind of chain data structure composed of data blocks connected in sequence according to the time sequence, and it is a distributed account book that can not be tampered with and forged by means of cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing paradigm, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data.

7. From the perspective of mechanism design, blockchain can be divided into three levels:
the first level is distributed network, which mainly solves the problem of point-to-point communication network and is also the foundation of blockchain
by establishing a set of cryptography account book system on top of point-to-point communication, we can move from point-to-point communication to point-to-point transaction, which is the second level of blockchain - distributed account book
adding new incentive mechanism and governance mechanism on the basis of distributed ledger is the third level of blockchain - public blockchain, such as bitcoin blockchain.