| Oracle® In-Memory Database Cache Introduction Release 11.2.1 Part Number E14261-02 |
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View PDF |
| Oracle® In-Memory Database Cache Introduction Release 11.2.1 Part Number E14261-02 |
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View PDF |
This chapter includes the following topics:
TimesTen and IMDB Cache software is easy to install. On UNIX systems, TimesTen is installed by a simple set-up script. On Windows, TimesTen is installed by running InstallShield®.
TimesTen and IMDB Cache are installed with Access Control to allow only users with specific privileges to access particular TimesTen features.
TimesTen Access Control uses standard SQL statements to establish TimesTen user accounts with specific privilege levels. TimesTen offers object-level access control as well as database-level access control.
Most TimesTen and IMDB Cache administration tasks are performed with command line utilities. The following table summarizes common utilities:
| Name | Description |
|---|---|
ttAdmin |
A general utility for managing TimesTen databases and IMDB Caches. Used to specify policies for automatically or manually loading and unloading databases from RAM, as well as to starting and stopping TimesTen cache agents and replication agents. |
ttBackup and ttRestore |
Used to create a backup copy of a database and restore it at a later time. |
ttBulkCp |
Used to transfer data between TimesTen tables and ASCII files. |
ttIsql |
Used to run SQL interactively from the command line. Also provides a number of administrative commands to reconfigure and monitor databases. |
ttMigrate |
Used to save tables and cache group definitions to a binary data file. Also used to restore tables and cache group definitions from the binary file. |
ttRepAdmin |
Used to monitor replication status. |
ttSize |
Used to estimate the amount of space to allocate for a table in the database. |
ttStatus |
Used to display information that describes the current state of TimesTen or IMDB Cache. |
ttTraceMon |
Used to enable and disable the TimesTen and IMDB Cache internal tracing facilities. |
ttXactAdmin |
Used to list ownership, status, log and lock information for each outstanding transaction. The ttXactAdmin utility also allows users to commit, abort or forget an XA transaction branch. |
TimesTen provides SQL statements for administrative activities such as creating and managing tables, replication schemes, cache groups, materialized views, and indexes.
The metadata for each TimesTen database is stored in a group of system tables. Applications can use SQL SELECT queries on these tables to monitor the current state of a database.
Administrators can use the ttIsql utility for SQL interaction with a database. For example, there are several built-in ttIsql commands that display information on database structures.
Oracle SQL Developer is a graphical tool for database development tasks.
Use SQL Developer to create, edit and delete TimesTen database objects and enter SQL statements directly into the TimesTen database or IMDB Cache. You can also use it to browse objects in multiple databases. IMDB Cache users can view tables in the cache database and the Oracle database at the same time.
SQL Developer is available on Windows and Linux. It communicates to TimesTen and the IMDB Cache by using the TimesTen JDBC driver, so it must be installed on a machine where either a TimesTen client or a TimesTen server installation is present. SQL Developer supports TimesTen 7.0.2.0.0 and later.
The Oracle TimesTen In-Memory Database Plug-In for Oracle Enterprise Manager is deployed as part of an Enterprise Manager Agent, running on the server on which the TimesTen or IMDB Cache database resides. The TimesTen Plugin provides users the ability to monitor system information and view database configuration and performance statistics for key areas including checkpoints, connections, locks, memory, replication, transactions and workloads.Users can monitor the information with the browser interface or generate reports using the Enterprise Manager report wizard.
The ODBC Administrator is a utility program used on Windows to create, configure and delete data source definitions. You can use it to define a data source and set connection attributes.
TimesTen and the IMDB Cache provide the facilities to perform three types of upgrades:
In-place upgrades are typically used to move to a new patch release of TimesTen or IMDB Cache.
In-place upgrades can be done without destroying the existing databases. However, all applications must first disconnect from the databases, and the databases must be unloaded from shared memory. After uninstalling the old release of TimesTen or IMDB Cache and installing the new release, applications can reconnect to the databases and resume operation.
Offline upgrades are performed by using the ttMigrate utility to export the database into an external file and to restore the database with the desired changes.
Use offline upgrades to perform the following tasks:
Move to a new major TimesTen or IMDB Cache release
Move to a different directory or machine
Reduce database size
During an offline upgrade, the database is not available to applications. Offline upgrades usually require enough disk space for an extra copy of the upgraded database.
TimesTen replication enables online upgrades, which can be performed online by the ttMigrate and ttRepAdmin utilities while the database and its applications remain operational and available to users. Online upgrades are useful for applications where continuous availability of the database is critical.
Use online upgrades to perform the following tasks:
Move to a new major release of TimesTen or IMDB Cache and retain continuous availability to the database
Increase or reduce the database size
Move the database to a new location or machine
Updates made to the database during the upgrade are transmitted to the upgraded database at the end of the upgrade process. Because an online upgrade requires that the database be replicated to another database, it can require more memory and disk space than offline upgrades.
For more information about installing and upgrading TimesTen, see Oracle TimesTen In-Memory Database Installation Guide.
For more information about Access Control, see Oracle TimesTen In-Memory Database Operations Guide.
For more information about general administration of TimesTen, see "Creating TimesTen Data Stores" and "Working with Data in a TimesTen Data Store" in Oracle TimesTen In-Memory Database Operations Guide. These chapters include the use of the ODBC Administrator.
For more information about administering TimesTen replication, see Oracle TimesTen In-Memory Database TimesTen to TimesTen Replication Guide.
For a complete list of SQL statements, see Oracle TimesTen In-Memory Database SQL Reference.
For a complete list of TimesTen command-line utilities, see Oracle TimesTen In-Memory Database Reference.
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