Dell PowerVault DP600 - Manual (Page 106)

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Managing DPM Performance on a WAN
Performance is a serious consideration when the DPM server and the servers that it is protecting
are connected by low-speed wide area network (WAN) links, particularly for resource-intensive
jobs such as replica creation and consistency checks. For example, transferring a 20-GB volume
across a 512-Kbps link would take at least 120 hours.
In this network configuration, you should enable compression for all protection groups. For replica
creation of volumes larger than 5 GB, we recommend that you create the replica manually.
See Also
Managing Performance
How Protection Group Changes Affect Jobs
Changes to the configuration of a DPM protection group can result in the cancellation of some
active jobs. A change could affect replica jobs, archive jobs, or both. The following table lists the
jobs that are canceled in each category.
Job types
Replica jobs Archive jobs
• Replica creation
• Consistency check
• Synchronization
• Create recovery point on disk
• Recovery from disk • Create recovery point on tape
• Verification of data on tape
• Copy data to tape
• Back up to tape
• Recovery from tape
The following table lists the affects of protection group changes on active jobs. Jobs can be
canceled for all members of the protection group ("protection group"), all data sources on the
protected computer ("protected computer"), or all protected computers in the same time zone as
the computer hosting the data sources in the protection group that is changed ("time zone").
Protection group changes and active jobs
Change to protection group Job cancellations
Remove tape-based protection Archive jobs for the protection group
Add disk-based protection Archive jobs for the protection group if tape-
based protection is configured
Remove disk-based protection Replica and archive jobs for the protection
group