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NOTE:
If an active replication job was interrupted (for example, the cartridge was loaded into
a virtual tape drive or the link failed), this will cancel/reschedule the replication job and return it
to "Mirror Scheduled" status (if within a replication window) or "Out of Sync" (if outside of a
replication window) so that the replication job is run again once the interruption is resolved.
Target Device Replication Status
On the target device GUI you can check the replication status of each target virtual cartridge by
viewing "Slots" in a LAN/WAN replication targets. The "Last Successful Echo Copy" field shows
the date/time of the last successful replication operation. If the cartridge has never been replicated
or is in the middle of replicating the date/time is shown as "Unknown."
This target status information is very important in the event of a disaster because the source site
(including the source device) is destroyed and therefore the target device is the only available
source of information on what cartridges were replicated successfully. This information is needed
because when you restore from the target device you do not want to restore from cartridge in an
"Unknown" replication state because it could be half way through replicating or it could be obsolete
data. You can therefore use the "Last Successful Echo Copy" date/time to determine which target
virtual cartridges are safe to restore from.
Replication Job Status
On both the source and target device GUI, in the Automigration/Replication tab you can click on
the "Job Reporting" branch to view the active replication jobs. This allows you to monitor the
progress of the active jobs (with percentage complete indicators to monitor the actual replication
transfer) and you can also manually cancel any active jobs using the "Cancel" buttons.
Replication Job History
On both the source and target device GUI, you can use the replication "Job History" to view the
active and historical replication jobs. This can be used to monitor job successes and failures and
also the performance of the replication jobs. The "Start Time" and "End Time" represent the entire
replication job including preprocessing and postprocessing (so you can determine whether the
entire replication process is finishing on time), but the "Duration" and "Transfer Rate" represents
just the delta data (plus metadata) that is actually transferred from source to target device.
Given this provides a historical view, there will generally be multiple replication jobs for each
virtual cartridge. For example, each time a source virtual cartridge is appended/overwritten the
cartridge will be re-replicated each time, or if a replication was interrupted (for example, by loading
the cartridge into a drive) then each time the job is restarted it will be a new job in the history.
Interrupted jobs will have a status of "Rescheduled" to indicate this.
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Replication
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