Licensing; Implementing The Initialization Process; Options For Initialization The Initial Data - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

Licensing

On HP D2D 2500/4000/4100 Backup Systems, Dynamic deduplication is included as standard.
Replication is a licensable feature at extra cost. Only one license is required for the replication target.

Implementing the Initialization Process

Before D2D replication can take place the reference data (the first full backup cycle performed with
deduplication enabled) needs to be sent to the target. This initial reference copy of the data is large
and could take a significant amount of time to transfer (weeks or months) if the WAN/LAN replication
link was sized around the daily deduplicated data to be transferred. Once the target is initialized
with the reference data the daily deduplication-enabled replication can commence over the WAN/LAN
link. The following diagram shows the initialization options:
Figure 29 Options for Initialization the Initial Data
.
• Active/Passive initialization options:
• Option 1: Co-locate the units and use a local high bandwidth (GbE) link, then separate units
and ship one to the target site.
• Option 2: If the link bandwidth is high enough and you are willing to wait several days then
use the WAN replication link to initialize the target device.
• Option 3: Use physical tape initialization. Physical tape library access is required at both sites.
Export tapes from the source, import tapes into the target. During the import, the deduplication
store is automatically created. Data is exported in backup software format.
• Many-to-one initialization options:
Co-location is probably not an option here because once remote sites are replicating to a single
target device you do not want to disturb it to ship to a remote site to initialize it.
• Option 1: If the link bandwidth is high enough and you are willing to wait several days then
use the WAN replication link to initialize the target device.
74 D2D Systems