HP 12000 HP StorageWorks 12000 Gateway Virtual Library System User Guide (AH81 - Page 49

Smart Copy Concepts, Replication Concepts

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established policy. If a destination tape was ejected while a copy was pending, then notifications in the VLS GUI will inform the user that they have interrupted the copy process. Smart Copy Concepts Smart copy allows the backup application to trigger copies from virtual cartridges to destination cartridges, and the VLS then performs that copy inside the device. The backup application can only use this feature if it supports the HP smart copy mechanism (via SMI-S v1.3 or later copy services). Keep in mind the following when determining whether to use smart copy pools: • The destination library is not visible to the backup application. • Copy traffic is no longer routed through the SAN. • All destination tapes created by smart copy are in the native tape format, so they can be restored directly from any tape drive or library that is visible to the backup application. • Because the copy jobs are initiated from the backup application, the backup application will be aware of any copy failures. • The destination library can only be used for copy operations. A smart copy pool is used to define which destination library slots are available as SMI-S copy targets for a specified source virtual library. Smart copy pools automatically detect all tapes in the destination library slots that are assigned to that pool. Destination tapes are unrelated to virtual cartridges - that is, they have different barcodes and headers. Smart copy jobs are initiated by the backup application using SMI-S V1.3 software, and the VLS then performs the specified copy (for example from a virtual cartridge to a destination cartridge, or from a destination cartridge back to a virtual cartridge, etc.). The backup application tracks the virtual cartridges and the destination cartridges separately since they have different barcodes and potentially different contents. NOTE: When smart copy jobs are triggered, they can override (reschedule) lower priority jobs, such as echo copy jobs, up to the maximum number of tape drives allocated to their smart copy pool. If you configure both smart copy pools and echo copy pools on the same VLS, it is advised that some destination library tape drives remain unallocated to smart copy pools so that echo copy operations can still continue while smart copy is active. Replication Concepts Replication provides automigration via LAN/WAN between two VLS devices. Because replication is a feature of automigration and uses the same Echo Copy policies that allow flexible cartridge/slot based configuration, any number of different replication configurations can be supported. You establish a replication policy and echo copy pools using Command View VLS in the same way you set up automigration with a destination library on the SAN. NOTE: The replication feature cannot use smart copy, only echo copy. During replication, the source VLS copies data to the echo copy pools on a replication library that is on the source. During the user-defined availability window, this replication library migrates data to the destination library, known as the LAN/WAN replication target. HP StorageWorks 12000 Gateway Virtual Library System User Guide 49

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established policy. If a destination tape was ejected while a copy was pending, then notifications in
the VLS GUI will inform the user that they have interrupted the copy process.
Smart Copy Concepts
Smart copy allows the backup application to trigger copies from virtual cartridges to destination
cartridges, and the VLS then performs that copy inside the device. The backup application can only
use this feature if it supports the HP smart copy mechanism (via SMI-S v1.3 or later copy services).
Keep in mind the following when determining whether to use smart copy pools:
•
The destination library is not visible to the backup application.
•
Copy traffic is no longer routed through the SAN.
•
All destination tapes created by smart copy are in the native tape format, so they can be restored
directly from any tape drive or library that is visible to the backup application.
•
Because the copy jobs are initiated from the backup application, the backup application will be
aware of any copy failures.
•
The destination library can only be used for copy operations.
A smart copy pool is used to define which destination library slots are available as SMI-S copy targets
for a specified source virtual library. Smart copy pools automatically detect all tapes in the destination
library slots that are assigned to that pool. Destination tapes are unrelated to virtual cartridges
–
that
is, they have different barcodes and headers. Smart copy jobs are initiated by the backup application
using SMI-S V1.3 software, and the VLS then performs the specified copy (for example from a virtual
cartridge to a destination cartridge, or from a destination cartridge back to a virtual cartridge, etc.).
The backup application tracks the virtual cartridges and the destination cartridges separately since
they have different barcodes and potentially different contents.
NOTE:
When smart copy jobs are triggered, they can override (reschedule) lower priority jobs, such as echo
copy jobs, up to the maximum number of tape drives allocated to their smart copy pool. If you configure
both smart copy pools and echo copy pools on the same VLS, it is advised that some destination
library tape drives remain unallocated to smart copy pools so that echo copy operations can still
continue while smart copy is active.
Replication Concepts
Replication provides automigration via LAN/WAN between two VLS devices. Because replication is
a feature of automigration and uses the same Echo Copy policies that allow flexible cartridge/slot
based configuration, any number of different replication configurations can be supported. You establish
a replication policy and echo copy pools using Command View VLS in the same way you set up
automigration with a destination library on the SAN.
NOTE:
The replication feature cannot use smart copy, only echo copy.
During replication, the source VLS copies data to the echo copy pools on a replication library that is
on the source. During the user-defined availability window, this replication library migrates data to
the destination library, known as the LAN/WAN replication target.
HP StorageWorks 12000 Gateway Virtual Library System User Guide
49