HP B6960-96035 Concepts Manual page 357

database server
Dbobject
DC directory
DCBF
delta backup
device
device chain
device group
they have common characteristics and share a common CA
EVA log.
See also copy set.
A computer with a large database stored on it, such as the SAP
R/3 or Microsoft SQL database. A server has a database that
can be accessed by clients.
(Informix Server specific term) An Informix Server physical
database object. It can be a blobspace, dbspace, or logical
log file.
The Detail Catalog (DC) directory contains DC binary files,
which store information about file versions. It represents the
DCBF part of the IDB, which occupies approximately 80% of
the IDB. The default DC directory is called the dcbf directory
and is located on the Cell Manager in the directory
Data_Protector_program_data\db40 (Windows Server
2008), Data_Protector_home\db40 (other Windows
systems), or /var/opt/omni/server/db40 (UNIX systems).
You can create more DC directories and use a custom location.
Up to 50 DC directories are supported per cell. The default
maximum size of a DC directory is 16 GB.
The Detail Catalog Binary Files (DCBF) part of the IDB stores
information about file versions and attributes. It occupies
approximately 80% of the IDB. One DC binary file is created
for each Data Protector medium used for backup. Its maximum
size is limited by the file system settings.
A delta backup is a backup containing all the changes made
to the database from the last backup of any type.
See also backup types.
A physical unit which contains either just a drive or a more
complex unit such as a library.
A device chain consists of several standalone devices configured
for sequential use. When a medium in one device gets full, the
backup automatically continues on a medium in the next device
in the device chain.
(EMC Symmetrix specific term) A logical unit representing several
EMC Symmetrix devices. A device cannot belong to more than
Concepts guide 357