Is CommerceServer taking over Sitecore?

In the case you have installed Sitecore 8.1 sc81151003 you may have encountered a silly error within your Sitecore Shell…

sitecorecommerce

but wait a minute, I have not installed Commerce Server, why I am getting this error?

In order to remove this unpleasant error message you have to remove the Sitecore.Commerce.Pipelines.ContentEditorLicenseWarning processcor pipeline.
The following patch file will delete the element.

My reccomendation would be also to place the config in a z folder in App_Config to run as the last config.

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
<sitecore>
<pipelines>
<getContentEditorWarnings>
<processor type="Sitecore.Commerce.Pipelines.ContentEditorLicenseWarning, Sitecore.Commerce">
<patch:delete />
</processor>
</getContentEditorWarnings>
</pipelines>
</sitecore>
</configuration>

Sitecore CMS only mode on 8.1

As you probably now, Sitecore 8.1 can run in CMS only mode that means that your Sitecore instance can live also without MONGODB architecture…

CMS only mode, disable all the features that require MONGODB like Analytics, behaviour personalisation, MVT but it still allow you to run inSession personalisation rules or execute personalisation rules that do not require MongoDB (eg. geoLocation personalisation)

In order to run Sitecore in CMS only mode you need to set the following parameters:

  1. Xdb.Enabled
  2. Xdb.Tracking.Enabled
  3. Xdb.Configuration.XdbSettings

Further documentation on CMS only mode can be found here:

https://doc.sitecore.net/sitecore_experience_platform/setting_up__maintaining/experience_management/experience_management_an_overview