Replication: Stored Size differences between Primary and Replication sites (DS-Systems)


Creation Date: May 28, 2008
Revision Date: March 11, 2011
Product: DS-System

Summary

This article describes some storage differences you should consider when using Replication.

Details

Only the backed up data is replicated from one DS-System to another. Some of the items that are not replicated are:

Because replication tries to optimize on transmission time and storage, the stored size might differ significantly between the primary (Production) and replication DS-Systems.

Note: The Protected Size always remains the same for each replicated DS-Client's data.

An invoice generated in DS-Billing for a replication DS-System may show totally different storage numbers than an invoice generated in DS-Billing for the primary DS-System. This might be an issue if you send an invoice for a replication DS-System to your customer. Some reasons for these billing differences are listed below:

Library files

Library files are replicated from a primary DS-System to a replication DS-System as libraries and their information is inserted in the DS-System database of the replication DS-System so that future files with the same content will link to them.

Master generations

Replication is performed "incremental forever" from the primary DS-System.

See Also



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