Disk backup system is being "eroded" the market tape backup – disk, ta
In many organizations, the tape is the main backup mechanism, the main reason is that the tape should be cheaper than disk storage. However, Enterprise Has never been very fond of using tape – tape is slow, often unreliable, while maintaining it requires a lot of manual tape library.
A result, many Company Have been looking for a better Solutions . With the gradual decline in the price of disk storage, some companies have used the disk to replace tape. Virtual Tape Library (VTL) is a disk-tape backup system to simulate the storage system. VTL and tape backup systems provide comparable power, while eliminating the shortcomings of the tape.
So, VTL Market Very fast growth rate. International Data Corporation (IDC) found that the world's VTL sales revenue has grown from 830 million U.S. dollars in 2007 increased to 930 million U.S. dollars in 2008. Many companies have realized the VTL trends and have access to this area. Dell, EMC, HP, IBM, NetApp, OverlandStorage, Quantum, Sepaton, SpectraLogic and Sun and other vendors have entered the field.
Companies and manufacturers have a tape backup system put a lot of time, energy and money. VTL so companies can continue to rely on tape backup software, but in turn the information written to disk rather than tape.
VTL disk prices drop as major driver of growth. In the past, the same cost of disk capacity 20 times greater than the tape. Recently, Technology Progress has been made that gap has narrowed, so the disk is only about three to four times the price of tape. As the disk is more convenient to deploy and maintain, the disk has become many companies the potential alternative to tape systems Program .
Moved to the VTL system can bring many benefits to the company, of which speed is the most attractive advantage. Written to disk can provide more than 10 times the tape is written (some cases even higher) performance increase.
Time savings allow the company to shorten their backup windows. Tape and Removable Storage, IDC research director RobertAmatruda said: "As many companies continue to increase the amount of data, which is struggling to complete the backup of the specified period of time." VTL will not let the company take very long to back up or force the company over the weekend backup, VTL allows the company to achieve a daily back up information.
VTL can also help achieve the file recovery. Here, the file can be recovered from the disk, and this feature can often be a tape drive cache. Through the disk backup systems, and information to restore just a few minutes (depending on the use of backup systems, sometimes even just a few clicks of the mouse), and tape backup system for information retrieval often requires several hours or even days.
In addition, the complexity of the disk is usually lower than the tape – and therefore more reliable. Tape subsystem includes a number of components, which in some cases these components often malfunction. Many companies find that their tape systems often do not have a good backup tasks to complete information. Moved to the VTL can improve the success rate of backup. After giving up tape system
, companies can increase their data redundancy. Virtual tape machine data can be transmitted through the wide area network to a secondary site, then the secondary site can be used as Disaster Recovery site.
However, the promotion of these disk backup system still faces some problems. VTL has launched several years, but still just an emerging technology. Scalability is one of VTL constraints faced. Large organizations can now deploy large-scale tape libraries, virtual tape library that the number of tape slots can be expanded from 10,000 to 100,000. VTL usually can not be achieved.
Data deduplication is a hot topic in one of the storage market. Although this function has been applied to a number of VTL above, but has not yet reached all VTL, and its implementation should be improved.
Tape backup system over the years has developed a powerful, one of the VTL vendors target is VTL on the use of these features. Therefore, a company must ensure that its VTL to support its own backup system, such as EMC's Networker, IBM's TivoliStorageManager, or Symantec's NetBackup. However, not all of the VTL can work together with the tape backup system.
VLT's at quite high prices. These systems are often priced at 5 million for prices starting at, and can easily exceed 10 million. The cost of large-scale enterprises in the VTL can even reach 100 million. In this difficult economic situation, many companies find difficult to get in VTL good return on investment.
Because of high prices, VTL on the market in small and medium enterprises are not popular. Most cases, these SMEs do not use tape systems, but do not think it necessary to do so. DaveRussell Gartner research vice president, said: "SMEs often use disk system for backup, rather than tape solutions."
VTL backup market, the market has already had a major impact. Although VTL is not a panacea, but many companies still find VTL backup system can help them improve performance, therefore they will VTL tape system as an alternative solution or auxiliary program.
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