![]() Storage pool thresholds enable retention of exported virtual tape data for certain periods of time (tape caching) QUADStor's Virtual Tape Library Auto replication to a remote server is supported for automatic disaster recovery management Tape Import/Exportĭata from a virtual tape can be easily exported to a physical tape either manually or can be triggered by backup application. With the VTL extended edition replication virtual tape data to one or more remote VTL servers for disaster recovery. Data can be compressed prior to storing on disk, the compression algorithm used is fast and can achieve 2:1 compression ratios. Data compressionĭata compression decreases disk capacity requirements with translates to lesser storage costs. With data deduplication, store terabytes of backup data for a fraction of the storage cost. The VTL extended edition supports inline data deduplication with support for backup data streams from leading backup applications. For example a WORM pool can be created for virtual cartridges with WORM property enabled. Additionally disk storage can be categorized into storage pools and virtual cartridges can be associated with a storage pool. Additional disk storage can be configured at a later point of time to increase the available storage capacity. Storage is allocated to a virtual cartridges on demand removing the need for pre allocation of disk space. Also multiple simultaneous backup streams improve overall backup throughput. Each backup server would direct its backups to its own VTL instance, removing the need for tape library sharing and backup stream multiplexing. Multiple VTL instances can be created and one or more VTL instances can be dedicated to a host. The integration of the VTL solution into the backup environment is seamless and non‐disruptive. From a backup application’s point of view nothing needs to change, and to it there isn’t a difference between a virtual tape and a physical tape library. ![]() Tape libraries and drives from leading manufacturers are emulated. Only data needed for archival purposes would have to be transferred to a physical tape, reducing the amount of tape media that is eventually needed. Handling of tape media is greatly reduced, hence lesser manual intervention is required. QUADStor VTL devices can be accessed over iSCSI, Fiber Channel (FC) and an InfiniBand network. When compared to other disk-to-disk backup (D2D) solutions, virtual tape libraries are high performance solutions with access to the virtual devices over the storage area network (SAN) while a D2D system utilizes a NAS network. Sequential access of data is still maintained by VTL system by writing the backup data to disk in a sequential manner. Benefits of a Virtual Tape Library (VTL) system Improved backup and restore timesĭisk based backup offers faster backup and restore times. Backup applications, policies, licenses etc need not change due to a VTL emulating an existing tape library system. The biggest advantage of a VTL over other disk based backup solutions is its seamless integration into an existing tape backup infrastructure. Backup streams sent to the virtual tape drives are however written to and restored from disk. The performance of disk based backup is generally consider faster and individual file restores from disk are significantly faster due to faster seek times.Ī VIRTUAL TAPE LIBRARY (VTL) is a disk based backup system which appears to the backup host as a real tape library system. In recent years disk based backup gained popularity due to a drop in disk prices and due to lesser manual intervention. With current tape technology, tape media have a lifetime of 30 years or more and therefore are the number one choice for data archival. Tape technology remains the most cost effective backup solution till date. What is a Virtual Tape Library ? QUADStor VTL Introduction
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