HP RISS Components manual Smart cell data backups, Separate Group Volumes, TSM backup terms

•Use a remote console program like VNC. (Use the PCC’s IP address.)

•Use the command line shell from the Tivoli administrative console program (dsmadmc, with admin as the user name and admin as the password).

The availability of these options depends on the access mode that is configured for your RISS. Discuss this with your HP service representative.

Smart cell data backups

After a RISS storage domain has been configured for backup, each smart cell group in that domain performs a backup every hour. Any new data files that have been stored in the group since the previous backup are combined into a single aggregate file and backed up.

The secondary smart cell usually performs this backup. However, the primary cell in the group performs the backup if the secondary cell is unavailable.

The smart cell itself initiates the backup. Because this is automatic and does not involve Tivoli’s internal scheduler, the TSM configuration does not include a schedule for smart cell backups.

Separate Group Volumes

An option for Separate Group Volumes is available in the Backup section of the RISS master configuration file. If selected, this option ensures that data backed up from one smart cell group is never stored

on the same media as another smart cell group.

Only select this option if you specifically require this functionality, because it complicates the creation of offline copies and leads to a less efficient use of backup tapes.

If you select the Separate Group Volumes option, a separate TSM node object and accompanying objects for each smart cell group are created. After you have selected this option, it cannot be changed without first removing all existing smart cell backups.

TSM backup terms

The following section contains short descriptions of important TSM terms and concepts and how they relate to each other.

The three basic TSM elements are library, device, and path:

A library is a set of one or more drives that have similar media mounting requirements. A library can also include robotic devices.

A device represents a tape or optical drive.

Apath describes a one-to-one relationship between a source and a destination. Data can flow from source to destination and back. The path is the element that connects the server, library, and device.

A device class is a logical collection of devices for similar media. Every device that is attached to a library has to be a member of a device class. The device class contains the library name and the device type.

A storage volume is the basic unit of storage media (for example, a tape). Storage volumes are grouped into storage pools, which can be arranged in a storage hierarchy. The term server storage represents all storage pools in the system.

The following terms define how client data is handled:

•A policy domain is a logical construct that keeps policy sets, management classes, and copy groups together.

•A policy set is a set of rules that defines how to handle client data within TSM. (A policy is a rule.)

•A management class determines how client files are managed and where they are initially stored. It also contains information about how to handle files that clients back up, archive, or migrate.

•Each management class can contain up to two copy groups: a backup copy group and an archive copy group. Each of them points to a destination, which is a storage pool where files

100 Backup system administration