Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

cluster A set of hosts that share a set of disks.
cluster-shareable disk
group
A disk group in which the disks are shared between more than one host.
cold backup The process of backing up a database that is not in active use.
command launcher A graphical user interface (GUI) window that displays a list of tasks that can be
performed by Veritas Volume Manager or other objects. Each task is listed with
the object type, task (action), and a description of the task. A task is launched by
clicking on the task in the Command Launcher. concatenation A Veritas Volume
Manager layout style characterized by subdisks that are arranged sequentially
and contiguously.
concurrent I/O A form of Direct I/O that does not require file-level write locks when writing to a
file. Concurrent I/O allows the relational database management system (RDBMS)
to write to a given file concurrently.
configuration database A set of records containing detailed information on existing Veritas Volume
Manager objects (such as disk and volume attributes). A single copy of a
configuration database is called a configuration copy.
control file An Oracle control file specifies the physical structure of an Oracle database,
including such things as the database name, names and locations of the datafiles
and redo log files, and the timestamp of when the database was created. When
you start an Oracle database, the control file is used to identify the database
instance name redo log files that must be opened for transaction recording and
recovery and datafiles where data is stored.
copy-on-write A technique for preserving the original of some data. As data is modified by a
write operation, the original copy of data is copied.
Applicable to Storage Checkpoint technology, where original data, at the time of
the Storage Checkpoint, must be copied from the file system to the Storage
Checkpoint when it is to be overwritten. This preserves the frozen image of the
file system in the Storage Checkpoint.
data block A logical database data storage unit. Blocks contain the actual data. When a
database is created, a data block size is specified. The database then uses and
allocates database space in data blocks.
data change object
(DCO)
A Veritas Volume Manager object used to manage FastResync map information
in the DCO log volume. A DCO and a DCO log volume must be associated with a
volume in order to implement persistent FastResync on that volume.
Data Storage
Checkpoint
A Storage Checkpoint that is a complete image of a file system. For more
information, see "Storage Checkpoint."
database A database is a collection of information that is organized in a structured fashion.
Two examples of databases are Relational Databases (such as Oracle, Sybase, or
Glossary402