Stamping Press Machine,Screw Washer Stamping Press Machine, Coin Minting Stamping Press Machine, Fins High Speed Stamping Press Machine, High Speed Stamping Press Machine Dongguan Samhoor Precision Machinery Co.,Ltd , https://www.samhoor-press.com
Sudden failures in data center operations (such as natural disasters and inevitable disasters) are unpredictable. The data in the computer is like a mine-sweeping game. The ambush is full of minefields. Game Over is possible at any time. Disaster recovery is data security. Line of defense, but you can avoid data loss caused by data center failures and data loss. Today I will introduce the "difference between disaster recovery and backup" and some simple points to minimize the chance of failure due to operation failure and strengthen the data backup environment of the enterprise.
What is disaster recovery?
Disaster recovery system refers to the establishment of two or more sets of IT systems with the same function in remote locations, which can monitor health status and switch functions between them. When a system stops due to an accident (such as a fire, earthquake, etc.) When working, the entire application system can be switched to another place, so that the system functions can continue to work normally.
Disaster recovery technology is an integral part of the system's high-availability technology. The disaster recovery system places more emphasis on dealing with the impact of the external environment on the system, especially the impact of catastrophic events on the entire IT node, and provides node-level system recovery functions.
Classification of disaster tolerance
According to the degree of protection of the system, the disaster recovery system can be divided into: data disaster recovery and application disaster recovery. Data disaster recovery refers to the establishment of an off-site data system, which is a real-time replication of local key application data.
Application disaster recovery is based on data disaster recovery, and a complete backup application system (which can be a backup for each other) equivalent to the local production system is established in a remote location. In the event of a disaster, the remote system quickly takes over the business operation, and the data recovery Disaster is the guarantee of disaster resistance, and the application of disaster recovery is the goal of disaster recovery system construction.
What is the connection between disaster recovery and backup?
Disaster recovery backup is actually two concepts. Disaster recovery is to ensure the normal operation of the information system in the event of a disaster, and to help enterprises achieve their business continuity goals. Backup is to deal with data loss caused by disasters. Before the emergence of integrated disaster recovery and backup products, the disaster recovery system and the backup system were independent. The goal of disaster recovery backup products is to help enterprises cope with "soft" disasters such as human misoperations, software errors, virus intrusions, and "hard" disasters such as hardware failures and natural disasters.
The difference between disaster recovery and backup
In general, backup refers to data backup or system backup, and disaster recovery refers to data backup or application system backup that are not in the same computer room. The backup is implemented using backup software technology, while disaster recovery is implemented through replication or mirroring software. The fundamental differences between the two are:
(1) Disaster recovery is mainly for major natural disasters such as fires and earthquakes, so a certain safety distance must be guaranteed between the backup center and the main center; data backup is performed in the same data center.
(2) The disaster recovery system not only protects data, the more important purpose is to ensure business continuity; while the data backup system only protects the security of the data.
(3) Disaster recovery guarantees the integrity of the data; backup can only restore the data before the backup time.
(4) Disaster recovery is an online process; backup is an offline process.
(5) In the disaster recovery system, the data of the two places are consistent in real time; the backup data has a certain timeliness.
(6) In the case of a failure, the switchover time of the disaster recovery system is several seconds to several minutes; and the recovery time of the backup system may be several hours to several tens of hours.
Classification of disaster recovery:
(1) Data level
Data-level disaster recovery is a basic means, which means that by establishing a remote disaster recovery center to do remote backup of data, to ensure that the original data will not be lost or damaged after a disaster, but at the data-level disaster recovery level, Applications are disrupted in the event of a disaster. This disaster recovery method can be simply understood as a remote data backup center, which is to establish a data backup system or a disaster recovery system, such as databases, files, and so on.
Advantages: relatively low cost and relatively simple implementation
Disadvantages: Data-level disaster recovery takes longer to recover
(2) Application level
Application-level disaster recovery is based on data-level disaster recovery. The same application system is also constructed at the backup site. Through synchronous or asynchronous replication technology, this can ensure that critical applications resume operations within the allowed time frame. Reduce the loss caused by the disaster, so that users basically do not feel the disaster. Application-level disaster recovery is to establish an application backup system. For example, a set of OA systems is running, and another set of OA systems is set up in another place.
Advantages: The services provided are complete, reliable and secure, ensuring business continuity
Disadvantages: higher cost, more software implementation required
(3) Business level
Business-level disaster recovery is a full-service disaster recovery. In addition to the necessary IT-related technologies, all infrastructure is required.
Pros: Guarantee business continuity
Disadvantages: The cost is very high, and it also requires investment in site costs, which is difficult to implement.
Backup level
Disaster recovery backup is to establish and maintain a backup storage system in an off-site location, using geographical separation to ensure the system and data's resistance to catastrophic events. According to the degree of resistance of the disaster recovery system to disasters, it can be divided into data disaster recovery and application disaster recovery. Data disaster recovery refers to the establishment of a remote data system, which is a real-time replication of key application data of the local system. When a disaster occurs, remote systems can quickly take over the local system to ensure business continuity. Application disaster recovery has a higher level than data disaster recovery, that is, a complete backup application system that is equivalent to the local data system is established in a different location (which can be a backup with the local application system or work with the local application system).
After the disaster, the remote application system quickly takes over or undertakes the business operation of the local application system. When designing a disaster recovery backup system, many factors need to be considered, such as the size of the backup / recovery data, the application data center, and the backup data center According to these factors and different application occasions, disaster recovery backup can be divided into four levels according to these factors and different application scenarios.
Level 0: No backup center
This level of disaster recovery backup, in fact, does not have disaster recovery capabilities. It only performs data backup locally, and the backed up data is only saved locally and not sent to another location.
Level 1: local tape backup, offsite storage
Back up critical data locally and send it offsite. After the disaster, restore the system and data according to the scheduled data recovery procedures. This solution is low cost and easy to configure. However, when the amount of data increases, there is a problem that the storage medium is difficult to manage, and when a disaster occurs, a large amount of data is difficult to recover in a timely manner. To solve this problem, when a disaster occurs, recover critical data first, and then recover non-critical data.
Level 2: Hot backup site backup
Establish a hot backup point in an off-site location to back up data through the network. That is, the data of the primary site is backed up to the backup site synchronously or asynchronously through the network. The backup site generally only backs up data and does not undertake business. When a disaster occurs, the backup site takes over the services of the primary site, thereby maintaining the continuity of business operations.
Level 3: Activity backup center
Establish two data centers in remote locations, both of which are in working state and back up each other's data. In the event of a disaster in one data center, another data center takes over its task. This level of backup can be divided into two types according to actual requirements and the amount of investment:
(1) The two data centers are limited to the mutual backup of key data;
(2) The two data centers are mirror images of each other, that is, zero data loss and so on. Zero data loss is a highly demanding disaster recovery backup method. It requires that no matter what disaster occurs, the system can ensure the security of the data. Therefore, it needs to configure complex management software and dedicated hardware equipment. The investment is relatively large, but the recovery speed is also large.