Recovery Manager for AD Disaster Recovery Edition 10.3 - User Guide

How many domain controllers to back up at once?

The Recovery Manager Console allows you to group the computers you want to back up into computer collections with each collection having its own backup creation parameters and schedule.

All computers in a computer collection are backed up simultaneously. The backup creation process may be a resource-consuming task if the number of computers in a collection is more than 10. Therefore, it is recommended that you back up only one computer collection at a time. Also, it is not recommended to have more than 10 domain controllers in a single computer collection.

What data to back up?

All of the domain controller backups that you plan to use for forest recovery include the following Active Directory® components:

• DIT Database

• SYSVOL

• Registry, including all registry hives and the NTUSER.DAT file

On the Advanced tab in the Properties dialog box for the computer collection, the When backing up Global Catalog servers, collect group membership information from all domains within the Active Directory forest option is selected by default. However, if the backup creation operation takes a significant time to complete, you may disable collecting group membership information from all domains within the forest.

To streamline the creation of Active Directory® backups, you can follow these best practices:

• Avoid using groups with cross-domain membership in Active Directory® as much as possible. To reveal such groups, you can use an Active Directory® reporting tool such as Quest® Enterprise Reporter.

• If you cannot avoid using groups with cross-domain membership, make sure you have a procedure in place to back up and restore these groups manually. For example, you can do so by using such command line tools as Ldifde or Csvde provided by Microsoft®.

Using data compression

For each computer collection you can specify the data compression method to be used in backup creation operations. To ensure both a reasonable backup time and a reasonable compressed backup size, it is recommended that you use either Fast or Normal compression method. For more information on how to specify a data compression method for a computer collection, see Performance tab.

Using unpacked backups

Recovery Manager for Active Directory can keep unpacked Active Directory® backups in the location you specify in order to reuse them for subsequent online restore operations. The use of unpacked backups helps to significantly accelerate the backup data preparation stage of an online restore operation.

Although the use of unpacked backups is helpful for online restores of individual Active Directory® objects, this approach is not recommended for forest recovery because in this case the entire Active Directory® database is unpacked on each domain controller you restore from backup, which can be a lengthy process.

It is recommended that you configure Recovery Manager to not unpack the Active Directory® backups you plan to use for forest recovery. For more information on how to do it, see Unpacked Backups tab.