Can someone advise what are the differences between Non-interactive Publisher and Consumer Posting ?
I see both can contribute the data to TREP
Yes, both can contribute the data to TREP.
1. Posting is used by consumers to push content into any cache within the TREP. Consumers connect to ADS and then use OMM post messages to post the content. The posting capability offers optional acknowledgments per posted message. The two types of posting are:
Moreover, posting also supports OMM-Based Contributions. Through such posting, clients can contribute data to a device on the head-end or a custom-provider. In the following example, the OMM consumer sends an OMM post to the ATS Application or Elektron. The traffic of posting flows from bottom to top.
2. Non-Interactive Provider is a broadcast-publishing type of provider. Its main purpose is to make their services available to consumers through TREP infrastructure components. Typically, Non-Interactive Providers connect to ADH in order to publish the data. After it connects to TREP, it will start sending information for any supported item and domain. The main benefit of this scenario is that all publishing traffic flows from top to bottom: the way a system normally expects updating data to flow.