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These database engines have unique code lines in order to provide small footprints
and have different intended roles. For this reason, we will describe these
briefly in the following subsections but will not explore their capabilities in great
detail elsewhere in this book.
Oracle TimesTen
Oracle TimesTen is a relational database that is stored in physical memory and is
typically used where very high-performance transaction-processing workloads are
present. Access to the TimesTen database is available through SQL, JDBC, JMS, and
ODBC. TimesTen databases can be deployed as exclusive or shared and can be created
as permanent or temporary.
The database is refreshed by gathering data using TimesTen libraries deployed to
applications or by using a Cache Connect option to an Oracle database. Because
data is read and updated in memory, average update or read response times are typically
measured in the millionths of seconds. The Cache Connect option supports
both read and write caching of Oracle database data. Updates can be bidirectional
between TimesTen and Oracle.


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