Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

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.
container A physical storage device that can be identified by a directory name, a device
name, or a file name.
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.
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
DB2), where data is stored in tables and generally accessed by one or more keys
and Flat File Databases, where data is not generally broken up into tables and
relationships. Databases generally provide tools and/or interfaces to retrieve data.
dataserver A logical concept of a Sybase instance. A Sybase instance contains databases and
daemon processes that manage the data. A Sybase dataserver manages Sybase
system databases and user created databases. Each Sybase datasever is uniquely
named when it is created.
DSS (Decision Support
Systems)
Computer-based systems used to model, identify, and solve problems, and make
decisions.
defragmentation The act of reorganizing data to reduce fragmentation. Data in file systems become
fragmented over time.
device file A block- or character-special file located in the /dev directory representing a
device.
device name The device name or address used to access a physical disk, such as c0t0d0. The
c#t#d# syntax identifies the controller, target address, and disk.
In a SAN environment, it is more convenient to use enclosure-based naming,
which forms the device name by concatenating the name of the enclosure (such
as enc0) with the disk’s number within the enclosure, separated by an underscore
Glossary536