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5.
Run the first full backup (to replicating media in the source echo copy pool).
Only backups performed after the echo copy pool is created will be replicated. Any previous
existing backups will not be replicated until their cartridges expire in the backup application
and are overwritten by new backups. For any backups that you want to replicate, you must
ensure your backup application is configured to use the virtual cartridge media in the source
device's echo copy pool. Any backups that go to virtual cartridges on the source device that
are not in an echo copy pool will not be replicated.
6.
Trigger the tape initialization (if tape initialization selected, then trigger after first full backup).
If you selected "Initialize via Tape Transport" when creating the echo copy pool, after the first
backup to the source device has successfully completed you must trigger the tape initialization
process. (See
subsequent replication jobs will transfer over the LAN/WAN.
7.
Subsequent backups occur.
8.
Run new backups and replicate (over the LAN/WAN to the target device).
Replication takes place when the source start and duration and target start and duration
windows are aligned and there is a subsequent backup to the source cartridges in the echo
copy pool. See
different priority jobs on the source device and having job throttling on the target device.
Implementing the Initialization Process
Before replication can take place, the reference data (the first full backup cycle performed with
deduplication and replication enabled) needs to be sent to the target. This initial reference copy
of the data is large; if the WAN/LAN replication link was sized around the daily deduplicated
data to be transferred it could take a significant amount of time to transfer the reference copy
(weeks or months). Once the source tape references are transferred to the target (initialized), the
daily deduplication/replication can commence over the WAN/LAN link. There are several options
for initialization of the reference data:
Physical tape initialization
WAN initialization
Co-location initialization
Implementing the Initialization
Advanced Replication Job Control
Process). After tape initialization is complete,
for design consideration around having
VLS Replication Implementation 105
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