HP Reference Information Storage System Version 1.6 Administration Guide revision 2 (T3559-90809, September 2007)

• Use a remote console program like VNC. (Use the PCC’s I P address.)
• Use the com mand line shell from the Tivoli administrative console prog ram (dsmadmc, with
admin astheusernameandadmin as the password).
The availability of these options depends on the a ccess mode that is configured for your RISS. Discuss
this with your HP service representative.
Smart cell data backups
After a RISS storag e domain has been configured for backup, each smart cell group in that domain
performs a backup every hour. Any new data filesthathavebeenstoredinthegroupsincetheprevious
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.
Thesmartcellitselfinitiatesthebackup.BecausethisisautomaticanddoesnotinvolveTivoli’sinternal
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 c onfiguration
file. If selected, this option ensures that data backed up from one sm art cell group is never stored
on the same med ia as another smart cell group.
Only select this option if you specifically require this functionality, because it complicates the creation
of offlinecopiesandleadstoalessefficient use of backup tapes.
If you select the Separate Group Volumes option, a separate TSM node object and accompanying
objects for each smart cell g roup are created. After you h ave 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 impor tant TSM terms and concepts and how they
relate t
o each other.
The three basic TSM elements are library, device,andpath:
A library is a set of one or more drives that have similar media mounting requirements. A library can
also inc
lude robotic devices.
A device represents a tape or optical drive.
A path describes a one-to-one relationship between a source and a destination. Data can fl ow from
source t
o destination and ba ck. The path is the element that connects the server, library, and device.
A device class is a logical collection of devices for s imi lar m e dia. Every d evice that is attached to a library
hastobeamemberofadeviceclass.Thedeviceclasscontainsthelibrarynameandthedevicetype.
A storage volume is the basic unit of storage media (for example, a tape) . Storage volumes a re grouped
into sto
rage 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 h a ndle files that clients back up, archive, or migrate.
• Each m
anagement class can contain up to t wo copy groups:abackupcopygroupandan
archi
ve copy group. Each of them points to a destination, which is a storage po ol where files
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Backup system administration