In this section, See also, Selecting the number of dpm servers – Dell PowerVault DP600 User Manual
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If you plan to protect a large Windows SharePoint Services farm, you should install DPM on a
volume that has sufficient disk space for the DPM database. The DPM database requires about 1
GB for every million items that exist in the farm. For example, if you protect a farm with 5 million
items, you would plan about 5 GB storage in the DPM database to hold the catalog for such a
farm. This space requirement is in addition to the storage space that DPM requires for the tape
backup catalogs, job logs, and so forth.
In This Section
Selecting the Number of DPM Servers
Selecting the Instance of SQL Server
Planning the Tape Libraries Configuration
See Also
End-User Recovery Considerations
Selecting the Number of DPM Servers
As you consider the number of DPM servers that your organization requires, keep in mind that
there is no precise formula for determining the number of DPM servers. In practice, the number of
servers and amount of data that a single DPM server can protect will vary based on the following
factors:
• Change rate of the data sources to be protected
• The amount of space available in the storage pool
• How often the data will be synchronized
• Available bandwidth at each protected computer
• Aggregate bandwidth on the DPM server
To get an estimate of your data change rate, you can review an incremental backup for a recent,
average day. The percentage of your data included in an incremental backup is usually indicative
of your data change rate. For example, if you have a total of 100 GB of data and your incremental
backup includes 10 GB, your data change rate is likely to be approximately 10 percent each day.
However, because the method that DPM uses to record changes to data is different from that of
most backup software, incremental backup size is not always a precise indicator of data change
rate. To refine your estimate of your data change rate, consider the characteristics of the data you
want to protect.