Setting up the mechanism of disaster-tolerant backup for enterprises

9.11 events in the United States, the world's enterprises sounded a wake-up call. All kinds of natural disasters and emergencies can lead to the paralysis of enterprise information system, which has disastrous consequences. A survey by Texas University in the United States shows that only 6% of companies can survive the loss of data, 43% of companies will shut down completely, and 51% will disappear within two years. Gartner Group's data also show that 2/5 of the companies that have gone through a major disaster have never resumed operations, and 1/3 of the remaining companies have been bankrupt within two years. For enterprises with high reliance on information and information concentration, how to minimize the negative impact of disaster on enterprises is a problem that needs high attention.

What is a disaster recovery backup?

Disaster-tolerant backup is a kind of information system which can provide the normal application service to the maximum extent after the disaster damage.

Disaster recovery backup can be divided into data backup and application backup. Data backup needs to ensure the integrity, reliability and consistency of user data. And for real-time service of the information system, the user's service request in the disaster may be interrupted, the application of backup can provide uninterrupted application services, so that customer service requests can continue to operate, to ensure that information systems provide services complete, reliable and consistent.

Data backup is the base of disaster tolerant system and the guarantee of disaster tolerance system. The application of backup is the construction goal of disaster tolerant system, it must be built on the basis of reliable data backup, and it can be realized by good coordination among various resources such as application system and network system.

According to the IBM Company share 78 standard, disaster-tolerant technology can be divided into 7 levels, from no disaster recovery measures, to the backup of the tape stored offsite, and then to establish the application system real-time switching of the remote disaster-tolerant backup center, data and applications recover time from several days to a few hours or even a few seconds.

A complete disaster recovery backup system includes local data backup, remote data replication, and offsite backup centers. Of course, not all enterprises need such a system, only to the essential business can not be interrupted to establish disaster recovery backup center. The small enterprise can achieve good disaster recovery backup effect by establishing the NAS or SAN off-line data backup and the artificial data transfer.

The evolving disaster recovery backup

The development of disaster-tolerant backup is gradually improved with the development of the Times and the progress of technology. With the way of information storage and the change of enterprise's reliance on information, the demand of disaster-tolerant backup is developing continuously.

In the past, small and medium-sized enterprises produced a very limited amount of data per day, a large number of data is stored in paper media, electronic resources need only through floppy disk and a small number of hard disk can be backed up, and then the backup data saved to a safe off-site can achieve disaster-tolerant effect. For large enterprises and data centers, large amounts of data are saved to tape through tape drives and tape libraries, and tapes are transported to higher security locations for disaster recovery.

In view of the current disaster-tolerant standards, this does not achieve full disaster-tolerance effect. Because when a disaster occurs, SMEs can only recover data and provide data services by renting or purchasing hardware. While large enterprises and data centers have backup hardware devices, the loss of data is unavoidable due to the inability to guarantee real-time data backup. This period, short time data recovery and the provision of real-time data applications is an elusive dream.

With the development of information technology, especially the development of e-commerce, the data of enterprise grows exponentially, and it is shifted from distributed storage to centralized storage gradually. A large number of data in the enterprise wealth, while the loss of data loss is also more and more, disaster recovery is showing the importance of backup.

Small enterprises because of the small amount of data, the intermittent requirements for the provision of data services, the widespread use of fragmented data backup, and then send the backup data away from the local preservation can withstand disaster. After the disaster occurred, according to the scheduled data recovery procedures to purchase and security equipment hardware platform to restore the system and data can be. Data from midsize enterprises is transmitted through tape to a hot backup site established offsite. In this way, the recovery of data and applications can usually be done in one day. However, data loss persists because there is no real-time data backup. Large enterprises and data centers not only through snapshots, remote data replication and other technologies to real-time data transmission to off-site backup, and in different places to establish a hot backup site, in the event of a disaster can automatically switch to take the key application. At this time of disaster recovery began to gradually mature. However, since many enterprises do not really realize the importance of disaster recovery, the impact of catastrophic events on the enterprise preparation is insufficient, and perfect disaster recovery has a great distance.