HP 12000 HP VLS Solutions Guide Design Guidelines for Virtual Library Systems - Page 52

How it Works, VLS Scalability

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Table 18 VLS12000 EVA Gateway Backup Throughput without Deduplication (continued) Number of VLS12000 EVA Gateway Nodes with 2:1 compressible data or deduplication disabled 6 1200 MB/s 1800 MB/s 2400 MB/ 3000 MB/s 3600 MB/s 4200 MB/s 4800 MB/s Number of 1 EVA8000 or EVA8100 Arrays 2 (assumes 112 drives per array controller) 3 800 MB/s 800 MB/s 800 MB/s 800 MB/s 800 MB/s 800 MB/s 800 MB/s 1200 MB/s 1600 MB/s 1600 MB/s 1600 MB/s 1600 MB/s 1600 MB/s 1600 MB/s 1200 MB/s 1800 MB/s 2400 MB/s 2400 MB/s 2400 MB/s 2400 MB/s 2400 MB/s 4 1200 MB/s 1800 MB/s 2400 MB/s 3000 MB/s 3200 MB/s 3200 MB/s 3200 MB/s 5 1200 MB/s 1800 MB/s 2400 MB/s 3000 MB/s 3600 MB/s 4000 MB/s 4000 MB/s 6 1200 MB/s 1800 MB/s 2400 MB/s 3000 MB/s 3600 MB/s 4200 MB/s 4800 MB/s How it Works VLS Scalability The VLS9X00 and VLS12X00 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 Figure 18 (page 53). 52 VLS Devices

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Table 18 VLS12000 EVA Gateway Backup Throughput without Deduplication
(continued)
Number of VLS12000 EVA Gateway Nodes with 2:1 compressible data or deduplication
disabled
4800
MB/s
4200
MB/s
3600
MB/s
3000
MB/s
2400 MB/
1800
MB/s
1200
MB/s
6
800 MB/s
800 MB/s
800 MB/s
800 MB/s
800 MB/s
800 MB/s
800 MB/s
1
Number of
EVA8000 or
1600
MB/s
1600
MB/s
1600
MB/s
1600
MB/s
1600
MB/s
1600
MB/s
1200
MB/s
2
EVA8100 Arrays
(assumes112
drives per array
controller)
2400
MB/s
2400
MB/s
2400
MB/s
2400
MB/s
2400
MB/s
1800
MB/s
1200
MB/s
3
3200
MB/s
3200
MB/s
3200
MB/s
3000
MB/s
2400
MB/s
1800
MB/s
1200
MB/s
4
4000
MB/s
4000
MB/s
3600
MB/s
3000
MB/s
2400
MB/s
1800
MB/s
1200
MB/s
5
4800
MB/s
4200
MB/s
3600
MB/s
3000
MB/s
2400
MB/s
1800
MB/s
1200
MB/s
6
How it Works
VLS Scalability
The VLS9X00 and VLS12X00 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
Figure 18 (page 53)
.
52
VLS Devices