Magento_ScalableCheckout module
Deprecated since 2.4.2 and will be removed.
This module provides the ability for system extension (Checkout can be configured to work with separate DataBase).
Extraction of Checkout tables to separate database will guarantee better scalability for Magento, and will allow the main server to be optimized for read operations which will reduce latency.
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The version of this module is 100.4.8.