Large Sme Site Consolidation Requiring Fibre Channel Shared Devices; Single Site Backup Consolidation Using Iscsi - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

Figure 18 Single Site Backup Consolidation using iSCSI
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Device configuration highlights:
• Configure iSCSI ports in high availability mode to give added redundancy.
• Configure a single library for best deduplication ratio or multiple libraries for best throughput.
• Consider configuring multiple virtual libraries for different data types (office files, MSExchange
databases) across multiple host servers to get the best possible performance and deduplication
ratio.
Backup application highlights:
• D2D devices have the highest throughput with multiple concurrent backup streams. Configure
multiple jobs to run in parallel (at least 4) to obtain best throughput.
• No additional licensing required for physical tape library because the backup application is
connected directly to the D2D unit (SAS or SCSI HBA required).
Recovery options: Depending on retention periods set, it is possible to recover all data directly from
D2D device over extended periods (3-6 months). If backup data on D2D is regularly copied to physical
tape and off-sited, there is a Disaster Recovery solution available also.
Solution advantages:
• Simple to implement
• Cost effective consolidation (iSCSI is free)
Solution trade-offs: Tape Offload functionality needs monitoring as a separate process.
When to use direct attach tape and when to use Backup ISV copy functionality?
If cost is a major driver, use direct tape attached to the D2D unit (because this does NOT attract extra
licencing costs with the backup software), and then use D2D tape offload capability to transfer data
from D2D to physical tape. However, this requires closer daily management by checking D2D through
the GUI. This copy is termed a media copy. If D2D tape has 50 GB of data, then 50 GB of data will
be transferred to physical tape and cannot be appended to.
Use Copy from D2D to Physical Tape using Backup Application when a single point of management
is required and where better use of physical media is required. Object copies via the ISV software
can merge several virtual cartridges onto a single physical cartridge saving physical media costs but
incurring additional licencing costs.

Large SME Site Consolidation Requiring Fibre Channel Shared Devices

Company requirements: fewer than 20 TB, up to 24 servers, growth proof, 12 hour backup window,
reduce dependency on physical tape.
HP StorageWorks VLS and D2D Solutions Guide 61