Enterprise data backup and recovery technology

[Paper Keywords] data backup data storage disk array management system for network disaster recovery
[Abstract] introduced the network data backup technology, select the appropriate data in the enterprise network server backup technology, which reduces the risk of data loss, recover data in a timely manner to ensure system security, and database backup methods and strategies, for example, of security database security methods. application that enterprise data backup solution for the technical staff for historical data query, statistics and analysis, and archiving critical information provides an important means of preservation.

Stored in the enterprise server business critical data, once these servers some kind of failure, these data may be lost completely, and can not be undone. There are many applications, such as material management systems, fuel management systems, human operational errors , hardware failures, computer viruses, hacker attacks, natural disasters and many other factors, may be that the collapse of the platform server system, data loss, thus causing the whole system incalculable damage [1]. For this reason, good and effective The server system data backup, even hardware damage, virus infection, misuse and other causes of data loss, you can quickly restore business systems, ensuring the security of enterprise data, there are well prepared as can only "foolproof."
First, data backup
Data to be retained in some way to damage the system or other specific circumstances, a process that can be reused. The fundamental purpose of data backup, is to re-use, core of the work is to restore the backup. One can not recover the backup, on any systems are meaningless. data backup storage area as an important component of its position in the storage system and the role can not be ignored. For a complete enterprise information application systems, backup work is an integral part of them. Its significance lies not only in preventing the destruction of accidents, but also historical data, the best way to save the archive.

(1 backup category. From the backup mode of view, can be divided into physical backups and logical backup, backup strategy from the point of view, can be divided into a full backup, incremental backup and differential backup, the backup server during the backup process according to whether the user can receive response and data update, and can be divided into offline backup and online backup, or as cold backup and hot backup. At present, the enterprise network backup and more use of the network data storage management system. network data storage management system is in the distribution of network environment, through professional data storage management software, combined with the appropriate hardware and storage devices to the network-wide centralized management of data backup in order to achieve automated backup, file archiving, hierarchical data storage and disaster recovery.

(2 backup server. Network data storage management system works in the network, select an application server (of course you can reprovision the network server as a dedicated backup server as a network data storage management server, install the network data storage management server software, network backup server as a whole. on the backup server a large-capacity storage devices connected. In other needs of network management, data backup backup client installed on the server software, through the LAN to the data and centralized backup management backup server attached storage device.

(3 backup software. Network data storage management system is the backup management software. Through the backup software program functions, for the entire enterprise to create a comprehensive backup plans and strategies, and can call functions with a backup, so that all servers Backup can be at the same time. Backup software also provides complete disaster recovery means the ability to back up the excellent characteristics of the hardware to give full play to make the backup and disaster recovery time is shortened, to achieve fully automated intelligent network data backup management. now can be done in the field of data storage management, network data backup software products are Legato NetWorker, IBM ADSM, Veritas NetBackup and so on.

(4 backup. The main methods of data backup: full backup, incremental backup, differential backup, on-demand backup. Full backup required for the longest time, but the recovery time of the shortest, most convenient operation, small amount of data when the system , the use of the most reliable full backup, but with the increasing amount of data, we will not be able to do full backup at any time, but only full backup at a specific time, other times we use the incremental backup with less time or using differential backups in between. a variety of different data backup: full backup> differential backup> incremental backup, the backup to be used flexibly according to their characteristics. daily backup system backup to describe what a day way, using what the backup media is a system backup program specific implementation details. in the formulation has been completed, the system should be carried out strictly in accordance with the daily backup, the backup program will not be able to reach the goal.

Second, the backup and recovery methods
Easy to manage and recover from the point of view, the development of data storage media pool group and the corresponding strategies, disaggregated data on different numbers on the tape group and to establish different access privileges. Disaster recovery measures in the entire backup system plays an important position. as it relates to whether the system has experienced rapid recovery after a disaster. disaster recovery operations can usually be divided into two categories. The first is the overall recovery, the second category is for individual file recovery, there is also worth mentioning that redirected restore. overall recovery: the general application of the disaster led to an accident on the server all the data loss, system crash or a planned system upgrade, system restructuring, also known as system restore, restore individual files: As the operator's level is not high individual file recovery can recover much more common than Quanpan, use of the network backup system recovery, it is easy to restore the damaged individual files, just browse the backup database or directory, find the file, touch recovery function, the software will automatically drive storage devices, load the appropriate storage media, and then restore the specified file, redirected restore: redirected restore the backup file is restored to a different location or the system up, instead of a backup operation at the location of their . redirection recovery can restore the entire system, individual files can be restored. redirection recovery requires careful consideration, to ensure that the system or file recovery after the availability.

Links to Research Papers Download http://www.hi138.com three backup technology to optimize
3.1 to prevent the failure
To guard against data loss, we need to do a detailed disaster recovery plan, but also regular disaster drills. After a time, should be a disaster exercise. Can be used out of the machine or extra hard drive for disaster simulation to skilled disaster recovery operations, and test the resulting disaster recovery floppy disk and disaster recovery backup is reliable. Many applications have their own backup program to an application system as an example: The current system includes 2 sets of data layer SUN V880 minicomputer ( 2 1.2G CPU, 4G memory, a HDS 9570 disk array (capacity of 2T, 2 units SUN V880 minicomputer through FC-HBA card directly connected to the disk array, 2 SUN V880 Minicomputer software for dual-use Veritas Cluster hot standby, the database for the Oracle9i Enterprise Edition. middle-tier server for the IBM PC Server running Windows operating systems, there are two simultaneously, if a problem can be handed over to another customer service charge. Disk Array At present, only one, and no spare hard drive.

3.2 System backup technology to optimize
(1 system performance. The system server is currently only one disk array, and no spare hard drive, to be increased to five backup hard drive. Taking into account the disk array controller or the Oracle database, the event of a failure, can lead to data loss or system can not be normal operation, so the need to configure a SUN V890 minicomputer, the system will be running regular backups of the database system to this machine, the system is enabled when the major problems of the machine. In addition, with the increase in the amount of data, the system operation response time also increased, particularly during peak periods in the business have affected the system response speed to run the business. Thus, the original memory is configured to 2CPU 4G Minicomputer two SUN V880 to be upgraded to 4CPU 16G memory.

(2 server cluster system backup and recovery. There are a lot of business applications, such as portals, OA, domain, proxy servers, the operation of human error, hardware failure, computer viruses, hacker attacks, natural disasters and many other factors, have may result in the collapse of the platform server system, data loss, thus the whole system incalculable loss. within the enterprise to build a unified, highly available operating system backup and recovery management solutions, through professional operating system backup and recovery software will recover quickly , to avoid the resulting risk. companies need a centralized backup solution, as shown in Figure 1. the basis of existing network equipment, new backup server, without changing the existing network infrastructure. The centralized server data backup to the backup server disk array. the future will need to purchase specialized backup and recovery software and a disk array, the whole network will automatically backup multiple servers to disk arrays. When any server system failures, crashes, can be simple, quick recovery system backup and fast restore the system to run applications and protect the overall system availability. a complete data backup and disaster recovery solutions include: backup hardware, backup software, backup systems and disaster recovery plan has four parts. chose advanced backup hardware, backup software must not ignore the choice, because only the best pieces to be fully back up the advanced hardware features to ensure fast and effective data backup and recovery, but also the need for daily backup systems and disaster recovery measures and the management of effective implementation of the backup system.

IV Conclusion
Database operation mode, status, fault type of backup and recovery has a decisive influence. Data backup is to ensure the safe operation of the server data
The last barrier, and most important, make data backup and disaster recovery as the network system to ensure safe operation of the cornerstone.

References:
[1] Lu Chuan, Hu Xinjie. Oracle 10g Collection [M]. Beijing: Electronic Industry Press, 2007. Links http://www.hi138.com Research Papers Download