Recommended deployments in AEM6

URL:
https://helpx.adobe.com/experience-manager/6-4/sites/deploying/using/recommended-deploys.html

Note:

• MongoDB is third-party software and is not included in the AEM licensing package. For more information see the MongoDB licensing policy page.
• In order to get the most of your AEM deployment, Adobe recommends licensing the MongoDB Enterprise version in order to benefit from professional support.
• The license includes a standard replica set, which is composed of one primary and two secondary instances that can be used for either the author or the publish deployments.
• In case you wish to run both author and publish on MongoDB, two separate licenses need to be purchased.
• For more information, see the MongoDB for Adobe Experience Manager page.