Blockchain World Center
blockchain is a digital account book that can be jointly bookkept, and will record all transactions that have occurred and have been unanimously recognized by the system it's the same as the whole family. You're bookkeeping, and your father and mother are also bookkeeping. They can see the general ledger, but the saved information can't be tampered with any more
In 2008, Nakamoto first proposed the concept of blockchain subsequently, blockchain has become the core component of electronic currency bitcoin, which serves as the public account book for all transactions. By using peer-to-peer network and distributed timestamp server, the blockchain database can be managed independentlyextended data:
type of blockchain
1, public blockchain
any indivial or group in the world can send transactions, and transactions can be effectively confirmed by the blockchain, and anyone can participate in its consensus process. Public blockchain is the earliest and the most widely used blockchain. The virtual digital currencies of bitcoin series are all based on public blockchain. There is only one blockchain corresponding to this currency in the world
2, Alliance (instry) blockchain
instry blockchain: multiple preselected nodes are designated as bookkeepers within a group, and the generation of each block is jointly determined by all preselected nodes (preselected nodes participate in the consensus process), and other access nodes can participate in the transaction, However, regardless of the bookkeeping process (in essence, it is still managed bookkeeping, only distributed bookkeeping, how many preselected nodes, and how to determine the bookkeeper of each block to become the main risk point of the blockchain), anyone else can conct limited query through the open API of the blockchain
3, private blockchain
only uses the general ledger technology of blockchain for bookkeeping. It can be a company or an indivial, and enjoys the write permission of the blockchain. This blockchain is not very different from other distributed storage schemes
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 dataso 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
China blockchain network adheres to & quot; Overview the situation and trends of blockchain, gather the business strategy of blockchain, spread the hot information of blockchain, and show the rich value of blockchain; It relies on world authoritative institutions (China social and economic decision making Advisory Committee, China social and economic decision making Advisory Center, China Market Research Center and China Market Research Center) to study, judge and make decisions on the blockchain. The operating institutions cooperate with the people's Bank of China, China Banking Regulatory Commission, China Securities Regulatory Commission, China Insurance Regulatory Commission, top 10 commercial banks, top 10 law firms, top 10 law firms, top 10 commercial banks, top 10 law firms The top ten accounting firms, top ten intellectual property companies, China professional credit platform and more than 100 Internet and financial research institutions of relevant national ministries and commissions have cooperated to absorb the authoritative views of 650 well-known experts and scholars from 200 key universities at home and abroad, and have more than 2000 excellent editors and 500 national Internet technology backbone special contributors to provide first-line information. Its authority, foresight, comprehensiveness, strategy, authenticity and practicability have been recognized by the global market, making China's blockchain network unique in the global blockchain field
the & quot
China blockchain network is a large-scale comprehensive media organization officially approved by relevant state departments to release financial and economic information. The website was jointly organized by China Enterprise News Watch, 28 financial institutions, 36 colleges and universities, 200 business associations and more than 100 world-famous media in 2012. It is now undertaken by Zhongcheng Cultural Media Co., Ltd. and is the world's largest blockchain portal
China blockchain network adheres to & quot; Overview the situation and trends of blockchain, gather the business strategy of blockchain, spread the hot information of blockchain, and show the rich value of blockchain; It relies on world authoritative institutions (China social and economic decision making Advisory Committee, China social and economic decision making Advisory Center, China Market Research Center and China Market Research Center) to study, judge and make decisions on the blockchain. The operating institutions cooperate with the people's Bank of China, China Banking Regulatory Commission, China Securities Regulatory Commission, China Insurance Regulatory Commission, top 10 commercial banks, top 10 law firms, top 10 law firms, top 10 commercial banks, top 10 law firms The top ten accounting firms, top ten intellectual property companies, China professional credit platform and more than 100 Internet and financial research institutions of relevant national ministries and commissions have cooperated to absorb the authoritative views of 650 well-known experts and scholars from 200 key universities at home and abroad, and have more than 2000 excellent editors and 500 national Internet technology backbone special contributors to provide first-line information. Its authority, foresight, comprehensiveness, strategy, authenticity and practicability have been recognized by the global market, making China's blockchain network unique in the global blockchain field
the & quot; Chain network, chain weekly, chain research report, finance and economics, news, banking, legal system, securities, futures, finance, finance, intellectual property, digital currency, financial management, credit and culture; And other important columns are famous all over the world. All kinds of dynamic information broadcasted daily is directly connected to financial institutions, central banks, China Banking Regulatory Commission, China Insurance Regulatory Commission, China Securities Regulatory Commission, commercial banks, Internet of things enterprises, law firms, financial companies, etc. all over the world. It is a link and bridge for blockchain to communicate and cooperate with all walks of life<
major activities such as "China small and medium sized enterprises investment and Development Forum" and "International Cultural Instry Investment Fair" sponsored and co sponsored by China blockchain network are well-known at home and abroad
the tenet of China blockchain network is to connect with the world, serve the world, run the network with integrity and keep pace with the world
Finance, news, banking, legal system, securities, futures, marketing, financial management, Culture & quot; And other important columns are famous all over the world. All kinds of dynamic information broadcasted daily is directly connected to financial institutions, central banks, China Banking Regulatory Commission, China Insurance Regulatory Commission, China Securities Regulatory Commission, commercial banks, policy banks, joint-stock banks and rural credit cooperatives all over the world, which is the link and bridge of communication and cooperation between blockchain and all sectors of society<
major activities such as "China small and medium sized enterprises investment and Development Forum" and "International Cultural Instry Investment Fair" sponsored and co sponsored by China blockchain network are well-known at home and abroad
the tenet of China blockchain network is to connect with the world, serve the world, run the network with integrity and keep pace with the world
China blockchain network: the leader of global blockchain
China blockchain network: the largest information exchange platform of global blockchain
Because the blockchain technology is not mature at this stage, and the infrastructure is not perfect, many applications are limited, and the overall application is still in a very early stage
First of all, the main function of blockchain is to store information. Any information that needs to be saved can be written to or read from the blockchain, so it is a database. Secondly, anyone can set up a server and join the blockchain network to become a node. In the world of blockchain, there is no central node (decentralization). Every node is equal and keeps the whole database. You can write / read data to any node, because all nodes will be synchronized in the end to ensure the consistency of the blockchain