A Pega inplace upgrade is when your current version of Pega is upgraded within the same environment and codebase. An out-of-place upgrade is when you migrate from an earlier version of Pega to a newer version, but the upgrade occurs in a different environment than the original one. It may also involve a different codebase. In addition, an out-of-place upgrade may require manual data migration, while an inplace upgrade may not.
In-place upgrade involves installing or upgrading a system or application without altering or replacing its existing hardware or software components. In contrast, out-of-place upgrade involves replacing hardware or software components in order to install or upgrade a system or application. In-place upgrade is suitable when general upgrades are required while out-of-place upgrade is necessary when large architectural changes to the system must be made.
Pega inplace upgrade is an upgrade process where the upgraded application version is installed directly on the running system (using the same application server, database, and other components), while a Pega out-of-place upgrade is an upgrade process where the upgraded application version is installed on a different system (with different application server, database, etc).
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