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The Free On-line Dictionary of Computing (foldoc)

An {Object-Oriented Database} from {AT&T} which extends {C++}
and supports fast queries, complex application modelling and
{multimedia}.

Ode uses one integrated data model ({C++} {class}es) for both
database and general purpose manipulation. An Ode database is
a collection of {persistent} {objects}. It is defined,
queried and manipulated using the language {O++}. O++
programs can be compiled with C++ programs, thus allowing the
use of existing C++ code. O++ provides facilities for
specifying transactions, creating and manipulating persistent
objects, querying the database and creating and manipulating
versions.

The Ode object database provides four object compatible
mechanisms for manipulating and querying the database. As
well as O++ there are OdeView - an {X Window System}
interface; OdeFS (a file system interface allowing objects to
be treated and manipulated like normal Unix files); and CQL,
a {C} variant of {SQL} for easing the transition from
{relational databases} to OODBs such as Ode.

Ode supports large objects (critical for {multimedia}
applications). Ode tracks the relationship between versions
of objects and provides facilities for accessing different
versions. Transactions can be specified as read-only; such
transactions are faster because they are not logged and they
are less likely to {deadlock}. 'Hypothetical' transactions
allow users to pose "what-if" scenarios (as with
{spreadsheets}).

EOS, the {storage engine} of Ode, is based on a client-server
architecture. EOS supports {concurrency} based on
{multi-granularity} two-version two-phase locking; it allows
many readers and one writer to access the same item
simultaneously. Standard two-phase locking is also available.
Ode supports both a {client-server} mode for multiple users
with concurrent access and a single user mode giving improved
performance.

Ode 3.0 is currently being used as the {multimedia} {database
engine} for {AT&T}'s {Interactive TV} project. Ode 2.0 has
also been distributed to more than 80 sites within AT&T and
more than 340 universities. Ode is available free to
universities under a non-disclosure agreement. The current
version, 3.0, is available only for {Sun} {SPARCstations}
running {SunOS} 4.1.3 and {Solaris} 2.3. Ode is being ported
to {Microsoft} {Windows NT}, {Windows 95} and {SGI}
{platforms}.

E-mail: Narain Gehani .

(1994-08-18)

font-style:italic;">V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006) (vera)

Open Dynamics Engine

English-German (Internet Dictionary Project)

Ode[Noun]

English-Italian (Internet Dictionary Project)

ode



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