HP 12000 HP VLS Solutions Guide Design Guidelines for Virtual Library Systems - Page 56
Virtual Libraries/drives/cartridge Configuration, Table 19 Base Capacity License by VLS Model
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Table 19 Base Capacity License by VLS Model (continued) VLS model VLS6653, 750 GB drives VLS9000-series Base capacity license Covers the two MSA20 disk array enclosures that come bundled. Each node adds a base license for one full VLS9000 array (48 drives, 30 TB or 40 TB). The entry-level VLS9000 7.5 and 10 TB systems do not need additional licenses to add capacity kits up to the full array configuration. VLS9200 VLS12X00 Each node has zero base licenses and requires capacity licenses for every 10 TB of capacity. Each node adds a base license for 10 EVA LUNs. The base 2-node VLS12000 kit includes a 5-LUN upgrade license giving a total license of 25 LUNs of up to 2 TB each. If capacity is added to the VLS beyond the above base license level, you must install capacity upgrade licenses (which you can install via the VLS GUI). There is a different upgrade license for each VLS range: Table 20 Adding Capacity Beyond the Base Configuration VLS model VLS6000-series VLS9X00-series VLS12X00-series Capacity upgrade license Enables an additional MSA20 array with 250/500 GB drives or half an MSA20 array with 750/1000 GB drives per license (so you need two licenses to add an MSA20 array with 750/1000 GB drives). Enables an additional 10 TB VLS9X00 capacity per license. Enables an additional 2 TB (1 LUN) per license. Virtual Libraries/drives/cartridge Configuration The VLS provides a very flexible virtual library configuration, allowing you to create many more virtual tapes drives than a physical library could contain (and therefore run many more concurrent backup jobs), and to create virtual cartridges of any required size. On the multi-node devices such as VLS9X00 and VLS12X00, you also have the key ability to create a virtual library across the VLS nodes (see VLS Scalability) thus providing a single backup target with the entire device performance and capacity if required along with the ability to increase the virtual library performance by adding more nodes at a later date. When designing the virtual library configuration keep in mind the following considerations: • The virtual library emulation type can be whatever is certified on the backup application. For example, Symantec NetBackup certification requires an emulation that is not the same as a physical library so the "HP VLS" library type is used for this. For other backup applications any library emulation can be used but generally the "HP ESL-E" is the most flexible emulation because it can scale to 50,000 slots in firmware version 6.0 and higher (10,000 slots in firmware versions 3.x and 2.3.1). Remember that the virtual library does not in any way have to match any existing physical library because it is a brand new library on the SAN. It will have very different geometry because it will have many more drives and slots than the physical library and will also have different SAN WWPNs and serial numbers (in other words, it is not a replacement for the physical library). • You always need to have multiple concurrent backups going to the VLS to achieve maximum throughput. Therefore, analyze how many concurrent backup jobs will be needed to saturate the VLS performance and create at least that many virtual tape drives in the virtual library. Do not create more drives than you need because there is a minor performance impact (5-10%) if you use the maximum number of drives per node compared to the optimum performance at 4-8 drives per Fibre Channel port. 56 VLS Devices