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Worked example – backup, replication and housekeeping overlaps
Because we have sized D2D2502 for the sources - there is a limit of 4 concurrent source replication jobs at any
one time.
This simulation is valid for Code Versions 2.1 and above which use container matching technology and
improved housekeeping performance.
Backup
Replication
Housekeeping
Start of Replication Window
Spare Time for future growth or Physical Tape Offload
Housekeeping Window
During a rotation scheme cartridges/shares are being overwritten daily, so housekeeping will happen daily.
Consider Sites A and D
In the example below housekeeping is happening when other backups are running and also when replication is
running.
Initial Configuration with NO replication blackout window set
There are many overlapping activities (housekeeping and replication running together) and performance is not
predictable.
There is no real control. Backups are
overlapping with replication and
housekeeping leading to unpredictable
results.