Carrying Case Owner's Manual

Data Store Upgrades 93
Upgrade modes
TimesTen allows you to perform these kinds of upgrades:
In-place upgrades
In-place upgrades are available for moving to a new patch release of
TimesTen, such as moving from the first patch release of 7.0, version
7.0.1.0.0, to the second patch release of 7.0, version 7.0.2.0.0. As long
as your TimesTen data stores do not reside in the TimesTen installation
directory, you can uninstall an old release of TimesTen, install a new
patch release of TimesTen and connect to existing data stores with the
new release. No separate action is required for existing stores.
In-place upgrades require all applications to disconnect from the data
store during the upgrade procedure. This kind of upgrade allows you to
preserve the existing data store without using TimesTen’s backup and
migration utilities.
Offline upgrades
During the time required to perform an offline upgrade, the data store is
not available to applications. Offline upgrades usually require enough
disk space for an extra copy of the upgraded data store.
Offline upgrades are used to:
• move to a new major or patch release of TimesTen.
• move to a different directory or machine.
• reduce data store size.
• move between 32-bit and 64-bit data stores.
You should perform offline upgrades during a time when applications
do not need continuous access to the data store. For example, if there is
a maintenance window during weekends, schedule the upgrade during
that time.
Offline upgrades require all applications to disconnect from the data
store during the upgrade procedure. The data store must also be
unloaded from shared memory. Offline upgrades require you to use
TimesTen’s ttMigrate or ttBackup utilities. (See "ttMigrate" and
"ttBackup" in Oracle TimesTen In-Memory Database API Reference
Guide.)