How It Works; Vls Scalability - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

How it Works

VLS Scalability

The VLS9000 and VLS12000 models have a multi-node "grid-like" architecture that provides the
ability to scale both performance and capacity of the virtual library while still presenting it as a single
backup target to the backup application. This means that all the backup jobs can be configured to
use the same shared backup target which dramatically improves the amount of day-to-day administration
required to run the backups, which is one of the main advantages of a consolidating to an
enterprise-class scalable backup device. This is significantly better than having to divide up the backup
solution into multiple smaller lower performance backup targets because this would require manual
administration of which backups use which target, and as backups grow this also means switching
backups from one target to another as each target starts to run out of performance or capacity. (This
is similar to using one enterprise tape library such as an ESL-E compared to using multiple autoloaders.)
The VLS nodes present the virtual library with its virtual tape drives and the virtual cartridges are stored
on the back-end array LUNs. The internal architecture of the VLS has every VLS node connected (via
dual paths) to every back-end array LUN as shown in
Number of VLS12000 EVA Gateway Nodes with 2:1 compressible data or
1200 1800
5
MB/s MB/s
1200 1800
6
MB/s MB/s
deduplication disabled
2400 3000
MB/s MB/s
2400 3000
MB/s MB/s
Figure 43:
HP StorageWorks VLS and D2D Solutions Guide
3600 4000 4000
MB/s MB/s MB/s
3600 4200 4800
MB/s MB/s MB/s
111