This page is available for these appliance versions:
AllegroGraph Configuration
This page does not apply to OntoPortal Appliance v4.0 and later, where AllegroGraph is already the default RDF triple-store — there is nothing to switch. See Triple-store Configuration for the options available on your appliance.
The switch-from-4store-to-AllegroGraph procedure described in the v3.2 version of this page is only relevant to appliances built before v4.0, which shipped with 4store as the default backend.