Dell PowerProtect Data Manager Appliance 5.12.0.1 Microsoft SQL Server User Guide

Configuring usage limits of Protection Storage streams

A storage unit can have soft and hard limits for streams. The Protection Storage administrator can set individual soft limits for read, write, and replication streams. The administrator can set a hard limit only for the total number of streams.

1. Determine which application agent hosts use the storage unit.
2. Determine the number of backup streams to allow for the storage unit.
3. Create the storage unit.
   The Protection Storage administrator can set the streams limit either as part of the ddboost storage-unit create command or after creating the storage unit by using the ddboost storage-unit modify command. The Protection Storage documentation provides information.
   NOTE The Protection Storage administrator cannot set a streams limit by using the Protection Storage Administration GUI.
4. Provide the Protection Storage hostname, storage unit name, username, and password of the storage unit to the application agent users to use to perform backups.

   The Protection Storage administrator can also set soft limits for the storage unit, which send alerts and notifications, but do not limit the number of streams used.

   The Protection Storage administrator can use the ddboost storage-unit modify command to modify the streams limits of storage units. The Protection Storage documentation provides information.

   CAUTION The Protection Storage administrator must use caution when setting a streams hard limit. Setting the streams limit to a low value can impact the backup and restore performance. Decreasing a streams limit can result in a restore failure. The Protection Storage administrator must notify the application agent users when decreasing a streams hard limit so that the application agent users can evaluate the potential impact on backups and restores.