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In this article, the editor introduces in detail "what's the difference between blockchain and database technology". The content is detailed, the steps are clear, and the details are handled properly. I hope this article "what's the difference between blockchain and database technology" can help you solve your doubts. Let's follow the editor's train of thought to learn new knowledge.

Database

Traditional database is a data structure used to store information. This contains the data that can be used to produce reports that support a wide range of business, financial and management decisions. The government also uses databases to store large data, which can have millions of records. Starting from the file grading system, the database provides the most basic information acquisition and storage functions. Then, the database uses related models, and by correlating multiple databases, there can be more complex ways to obtain data. The information stored in the database can be managed using a management system. Simple databases are stored in rows of data, called tables. The table contains different fields, which are used to define the types of different records, and storing data is called attributes. Each field contains columns and navigation, representing stored records.

The database can be modified, managed and controlled by the administrator. The database will always have an administrator and have complete control over the database. They can create, delete, and modify any record in the database. They can optimize database performance and size. Larger databases have slower performance, so administrators can use methods to optimize. The administrator can also transfer this identity to someone else. For example, an administrator can transfer his identity to another user to back up the database. However, there will also be problems, such as when the server spans, the only way is to restore from a backup. The database is also recursive, which means you can go back and repeat a task, or delete a task. If the information has been backed up, the administrator deletes previous records and other expired information. For example, if you write "John Smith" in the database now, you need to update your address now. But now there is a backup of "John Smith", so you can update it with the new address of the existing database.

The database can be implemented through the server architecture. This is because computers need to connect to servers, which manage databases so that they can get information and stored data. Initially, the database client uses ODBC to connect, which is set by the administrator, and then connects to the database. The client software will then run to complete the encrypted connection, but you must have permission to enter. This permission can be set by the administrator, or the user can enter it through a password. This is why user accounts are created to allow authenticated users to enter while rejecting those who are not authenticated. Most systems now use web interfaces. But for private information, authentication is still required, but the public database can be easily accessed through the web page.

We can see that the database needs enough control, which makes it highly centralized. At the same time, this also needs to be allowed, that is, the administrator is required to set how to let the user in. In a production environment, DB administrators need to set read-only permissions, and they also need to set update and write permissions for users. The centralization of the traditional database will ensure the security and trust of the system. Many databases run on private networks, with firewalls of large companies behind them. Other databases are based on cloud servers. But they still need administrators to control them.

Block chain

For the description of the blockchain, we will think of bitcoin. But there are also many private chains that run in an enterprise environment. Blockchain was born in 2009, and Bitcoin is based on its first system. In the Bitcoin system, blockchain is an immutable digital ledger and a growing number of encrypted distributed databases. The blockchain stores information in blocks of the same size. Each block contains hash information for the previous block, providing encryption security. The information of this hash is the data and signature in the previous block, and the hash of the previous block will return to the first block of the block chain, which is called "Genesis Block". The entire message is hashed through and points to the address of the next block. Block chain data structures, such as Merkel trees, are effective ways to validate data.

In order to enable the block to be added to the block chain, game theory is included in the whole process. The computers that act as nodes in the network are called "miners" and must compete to find the correct value from the nonce. Miners have to use computing resources to solve this number, and it also requires computer hardware. The protocol built into the blockchain can be used to determine the difficulty of solving a difficult problem through network-wide computing power. This means that the more miners there are, the more difficult it will be to solve the problem. This is because if there are more miners, there will be more computing resources on the network, and the hash force will be increased, that is, hmax s. Once the miners have verified the block, they will be rewarded for providing numeracy. This part of the incentive is the motivation to push the nodes to dig the mine, because they get transaction costs and tokens. In Bitcoin, this is also known as the workload proof algorithm.

As we can see, blockchains use decentralized distributed networks. Decentralization means that all nodes in the network store backups of the blockchain. Nodes store full-node backups, either mining, or both. There is no administrator to verify the block transfer. You need miners who can solve encryption problems, but this is based on the percentage of network-wide computing power. Once the chunk is added to the chain, the information is immutable and transparent. Blockchain transfers are irreversible, which means that once blocks are verified, they cannot be reused. The blockchain is fault tolerant because if one or more nodes are down, there will always be other nodes running the blockchain. Another advantage of decentralization is transparency for those who don't know or don't trust. Blockchain increases trust by recording transfers and provides encrypted security algorithms to trade data.

Blockchain is the network architecture of P2P. It does not need a centralized database, but all the nodes in the network are connected to each other. So, no one can control all the nodes. There is no administrator on the blockchain. What if someone in the node cheats? Will this affect the entire network? The theoretical answer is that if they get most of the math, then it is possible. In theory, if someone can control 51% of the computing power, they can control the network. This requires a lot of computing resources, so it is very expensive to generate attacks. Mining with computing resources is profitable. The essence of ensuring the security of the blockchain is decentralization. If someone wants to modify any information on the blockchain, they need the help of others to verify it. This will split the new chain from the main chain and will only be effective if it is longer than the main chain. There are thousands of nodes like Bitcoin, so if you need to cheat, you need to change all the nodes in the network. In fact, this requires a lot of calculation and electricity, and it is also very difficult to complete. This is a form of regulation to ensure that no one can deceive anyone. This is why the blockchain is immutable. At the same time, because the transfer information is visible to anyone, it is also transparent.

This is the difference between the blockchain and the database in the underlying architecture.

Block chain or database, when and which should be used?

Because of its good stability, the database is suitable for the enterprise network. They are also more user-friendly and have many supportive management systems for administrators and developers. Forbes 500 companies use databases to run high-end systems to process large amounts of data. The database can be expanded to millions of records and thousands of transfers can be processed per second. For handling large amounts of traffic, such as retail, a database is the best solution. The blockchain does not need to store a lot of processing for analysis, the database can store more data, and because it does not need nodes, the processing speed is faster. You don't need to encrypt every data. In general, the database is not encrypted because encryption adds a lot of redundancy to the database. Traditional databases improve encryption through authorization.

Unstructured data is another place where there is no need for blockchains, which are more suitable for database management systems. The data does not require trust verification, just as the store's data is recorded in the database every day. If you use blockchain to store private information, it will be very expensive. Information that can only be known to certain companies, such as social security and medical records, is stored in databases. The information used by the system can be publicly verified based on the block chain. This personal information can be authenticated on the block chain based on the public key encryption algorithm.

The database is suitable for:

Data that needs to be constantly updated, such as monitoring and sensors fast online money transfer process private information (not open to the public) financial data that needs to be processed quickly, data that does not need to be validated, data storage data, application relationship data

The need for blockchain is to build trust and transparency. Simply put, it is a public ledger that gives anyone access to information. It can help B2B transfer, such as supply chain, goods distribution and inventory to verify information. Transparency can help companies, such as advertising, minimize fraud by establishing more validation from advertising companies. Blockchain does not mean that large data records will have more information to verify. Bitcoin is the first successful deployment of blockchain, and it is also used as a system for value transfer and payment transfer verification. The success of Bitcoin also raises the problem of double-spending, which allows users to spend twice on the same token. Bitcoin uses a timestamp sequence that can be used to verify transfers. This will allow the system to process the transfer at the same time, thus preventing double flowers, which will be done in chronological order.

Some projects are studying the licensing system of blockchain and applying them to the voting system. Because the blockchain can verify identity and who will vote, it actually makes a lot of sense. The main goal is to prevent fraud, so blockchains can ensure the fairness of trust, and some blockchains do not require digital currency or mining, such as enterprise-level blockchains. In private and licensed environments, using blockchain technology can have new levels of systems, and sometimes integrate with databases to complete hybrid systems.

The database administrator will find that the blockchain is irrelevant. You cannot create links with related data in different block chains. This is the big difference between the two, so blockchains do not apply to these when information needs to be relevant.

Other applications of blockchain, such as smart contracts on Ethernet Square. These are more like database storage processes, where triggers can be used to execute code to process transfers. In the Ethernet Fong network, the intelligent contract runs code on all nodes in the network. Ethernet and other digital currencies, such as EOS and NEO, use blockchains as their smart contract ecology. This is an example of how blockchains are distinguished from traditional databases.

Blockchain is suitable for:

Verification of trusted data of fund transfer value transfer (identity, reputation, credit, etc.) Public key verification decentralized APP voting system

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