What are the benefits of database backup, there are several ways to backup a database and what are t

The deletion operation in the data is irreparable, sometimes the data in the data table may be deleted due to misoperation, or the database crashes for other reasons, and all the data is lost, especially when there is a large amount of useful data in the database, then it is impossible for you to enter the data again from the beginning, this is the role of the backup database, back up the database, when the above situation occurs, you can restore the previous database through the backup file.

The data of the database is all on the computer, if there is some accident (system crash, thought damage, hard disk damage, etc.), it will cause data loss, and it will take a lot of time and money to recover the data, so if the data is backed up, there is no need to worry about the above situation.

The file has been tampered with, or the data error caused by a sudden power failure, or the computer is abnormal, etc., in various situations, you can take out the backup data and overwrite it, and it will be good to ......If you don't have a backup, it's over.

1. Full backup

This is the most common way for most people to back up the entire database, including all database objects such as user tables, system tables, indexes, views, and stored procedures. But it takes more time and space, so make a full backup once a week.

2. Transaction log backup

The transaction log is a separate file that records changes to the database and only needs to copy the changes made to the database since the last backup, so it takes very little time. In order for the database to be robust, it is recommended to back up the transaction log every hour or even more frequently.

3. Differential backup

Also called incremental backup. It is another way to back up only a portion of the database, and instead of using the transaction log, it uses a new image of the entire database. It is smaller than the original full backup because it contains only the databases that have changed since the last full backup.

It has the advantage of being fast in storage and recovery. We recommend that you perform a differential backup once a day.

4. File backup

A database can be made up of many files on a hard disk. If the database is very large and you can't back it up overnight, you can use File Backup to back up a portion of the database every night. Since databases are generally not large enough to use multiple file stores, this type of backup is not very common.

Database backup importance.

Especially in some industries that require high data reliability, such as banking, **, telecommunications, etc., if there is an unplanned downtime or data loss, the loss can be very heavy. To this end, database administrators should develop detailed database backup and disaster recovery strategies based on specific business requirements, and rigorously test each possible scenario by simulating failures to ensure high data availability.

Database backup is a long-term process, and recovery is only carried out after an accident, recovery can be regarded as the reverse process of backup, and the degree of recovery depends largely on the backup situation. In addition, whether the database administrator takes the correct steps at the time of recovery also directly affects the final recovery outcome.

1. First of all, open the SQL Server management system tool and log in to the data management system with the database.

2. After entering, click the + sign in front of the database file, click on the + sign in front of the system database, and find the database you want to backup, such as the markt database.

3. Right-click on the markt database and select the backup option under the task option.

4. In the pop-up interface, select the backup composition, backup time, and backup path.

5. Then select OK to make a backup. After the backup is successful, a message will be displayed indicating that the backup is successful, and finally you can close it.

Tools to prepare: PC Butler software.

2. Open the data backup window Enter the name of the backup file The format starts with English letters, and I use the abbreviation: backup 2018 year end backup bf2018njbf

4. The backup data is in the backup folder of the software installation directory, and the file name is the name entered during the backup.

5. Create a new set of accounts for the next year This year is 18 years, so I need to build a set of accounts for 19 years.

6. Set up a set of accounts and log in to the software Click System Maintenance - Data Recovery.

7. Select the data that has been backed up before.

9. Click System Maintenance - Annual Balance.

11. After the annual balance, it will be backed up once in prompt, and for the sake of data security, it will be backed up several times.

12.Complete the annual balance.

With the rapid development of the Internet, a large amount of data is constantly being generated, and with it comes how to store, retrieve, and manage it safely and effectively. Issues such as effective storage, efficient access, convenient sharing, and security control of data have become a very important issue in the information age. So what's the point of data backup?

The following Yikibi Xiaoyu will tell you, and you can also look at the name of Xiaoyu.

The significance of data backup lies in the fact that when an accident occurs such as network attack, intrusion, power failure or operation error, the original system can be restored completely, quickly, simply and reliably, and the normal operation of the system can be guaranteed within a certain range. Some enterprises that do not pay much attention to backup data often regret the sudden loss or damage of server data. In terms of data backup, enterprises should regularly carry out tape backup, database backup, network data backup and update, remote mirror operation, etc., and can also carry out multiple data backups, one backup if there is a problem and redundant backup.

Method 2: Establish a disaster recovery center with backup does not mean that everything is fine, in the face of regional, devastating disasters such as ** and fire, etc., just data backup can not be recovered, then there needs to be a disaster recovery center to do remote backup of data, to ensure that the original data will not be lost or destroyed. The recovery time of data disaster recovery is relatively long, but the cost is low and the construction and implementation are relatively simple, and the main methods are real-time replication, scheduled replication, and storage** replication.

Of course, data backup is still the most basic, without data backup, any disaster recovery is of no practical significance. Method 3: Use RAID disk array to store data RAID, Chinese referred to as independent redundant disk array.

To put it simply, it is to combine multiple independent hard disks in different ways to form a hard disk group, which provides higher storage performance than a single hard disk and provides data backup technology, thereby greatly enhancing data security. The different ways in which a disk array is composed are called RAID levels, and selecting the appropriate RAID level can meet the user's requirements for storage system availability, performance, and capacity. By storing data in this way, we can recover damaged data relatively easily, as long as not all hard drives are damaged at the same time.

Method 4: Artificial misoperation without blind operation or modification of data is an important cause of data loss. Sometimes, if you accidentally delete files, or if you format them by mistake, partition them by mistake, clone partitions by mistake, or lose partition table information (MBR), you may not handle them well, and the entire server or even the entire system may be paralyzed or even shut down.

In addition to not modifying or blindly operating the server, it is also necessary to set reasonable permissions, such as giving the user permission "" to the user who is responsible for daily updates. This can greatly reduce the misoperation of non-professionals and greatly improve the data security of the server.

Threats to data are often difficult to prevent, and when they become a reality, they can destroy not only the data, but also the systems that access it. The main causes of data loss and destruction are as follows.

1. Data processing and access software platform failure.

2. The design vulnerabilities of the operating system or the "black hole" artificially preset by the designer for ulterior purposes.

3. Hardware failure of the system.

4. Human operation error.

5. Malicious damage by illegal visitors in the network.

6. Network power supply system failure, etc.

The important data, archives or historical records in the computer, whether it is for enterprise users or individual users, are very important, a moment of accidental loss, will cause immeasurable losses, at least the hard work accumulated in vain, serious will affect the normal operation of the enterprise, to scientific research, production caused huge losses.

In order to ensure the normal operation of production, sales and development, enterprise users should take advanced and effective measures to back up data and prevent it from happening.

The advent of the digital age has changed the business logic, changed the production relations within the enterprise, and the application and popularization of informatization have made everything possible to speak with data, and data has become more penetrating. Some people say that "the emergence of big data has started a new round of technological revolution in the world", and enterprises are facing a world that will be disrupted by digital at any time.

Because of this, data has become more valuable. While enterprises are thinking about how to make good use of these data to mine the value of enterprise data, the first thing to do is to protect these data and protect the capital of the enterprise.

The value of data is being valued by all walks of life, and the state also regards information security as an important national strategy, which shows that the significance of data backup is completely beyond the scope of its own data protection, and is an important means to protect national information security.

The role and value of database backup and recovery are mainly reflected in the following aspects:

1. Improve the high availability and disaster recoverability of the system, and when the database system crashes, the data can be found with database backup. Forward touch.

2. Using database backup to restore the database is the best solution to minimize the cost of data recovery when the database system crashes.

3. Database backup is a powerful stool to prevent disasters before they occur.

1. Cold backup, also known as offline backup, refers to a complete backup of the database when the data is being closed and the database cannot be updated, and the data can be restored specified.

2. Hot backup, also known as online backup, is a method of backing up a database in ArchiveLogmode mode when the database is running.

3. Logical backup refers to the use of software techniques to export data from the database and write an output file, the format of the file is generally different from the file format of the original database, just a reflection of the data content in the original database.