The desire to reduce the dependency on tape for recovery gave rise to the development of virtual tape libraries (VTLs) that use disk drives for storing backup data by emulating tapes and tape hardware. Off-site storage of backup data is accomplished by copying virtual tapes onto physical tapes and transporting them to an off-site facility. This backup design is called disk-to-disk-to-tape, or D2D2T—where the first disk (D) is in file server disk storage, the second disk (D) is in a virtual tape system, and tape refers to tape drives and media.
VTLs significantly improve the automation of backup processes and provide good backup performance, but are more expensive than tape backup systems. Because the storage capacity of virtual tape products is limited, it might not be possible to backup as many servers or retain as much backup data as desired. For cost, capacity, and performance reasons, VTLs were mostly used in niche environments until dedupe technology was integrated with them and made them more widely applicable.
Source of Information : Rethinking Enterprise Storage
Subscribe to:
Post Comments (Atom)
Cloud storage is for blocks too, not just files
One of the misconceptions about cloud storage is that it is only useful for storing files. This assumption comes from the popularity of file...
-
Many of the virus, adware, security, and crash problems with Windows occu when someone installs a driver of dubious origin. The driver suppo...
-
The Berkeley motes are a family of embedded sensor nodes sharing roughly the same architecture. Let us take the MICA mote as an example. T...
-
To facilitate the development of network traffic filtering products, Microsoft created the Windows Filtering Platform (WFP). It is available...
No comments:
Post a Comment