IBM DB2: Commercial relational DBMS. Last modification on December 23 2000.
PostgreSQL: a robust, next-generation, Object-Relational DBMS (ORDBMS), derived from
the Berkeley Postgres database management system. While PostgreSQL retains the
powerful object-relational data model, rich data types and easy extensibility
of Postgres, it replaces the PostQuel query language with an extended subset of
SQL. Last modification on December 12 2000.
Empress: Personal and multi-user database. Embedded SQL, language interfaces, 4GL
tools, interface builder, ODBC. Last modification on November 28 2000.
MDBMS: MDBMS is a new relational database management system. It is very clean
and small, yet powerful enough to do complex database work. MDBMS is currently
only available in binary form, for Linux and BSD systems. Last modification on September 24 1997.
Gigabase: GigaBASE is object-relational database system with the same programming
interface as FastDB main memory DBMS, but using page pool instead of mapping
database file to the memory. That is why GigaBASE is able to handle databases
which size exceeds size of computers virtual memory. As FastDB, GigaBASE
provides very convenient and efficient C++ interface. GigaBASE doesn't support
client-server architecture and provide concurrent access to the database only
for different threads within one process. GigaBASE is most efficient for
applications fetching records using indices or direct object references. High
speed of query execution is provided by elimination of data transfer overhead
and very effective locking implementation. Synchronization of concurrent
database access is implemented in GigaBASE by means of atomic instructions,
adding almost no overhead to query processing. GigaBASE uses modified B+tree
indices to provide fast access to disk resident data (with minimal disk read
operations). Last modification on December 26 2000.