Created question in FIWARE Q/A platform on 01-05-2019 at 18:05
Please, ANSWER this question AT https://stackoverflow.com/questions/55939379/is-it-possible-to-run-iot-agent-for-ultralight-2-0-without-mondodb-link-with-me

Question:
Is it possible to run IoT-Agent for Ultralight 2.0 without MondoDB link (with memory type of data hold)?

Description:
During configuring IoT-Agent for Ultralight 2.0 there is a possibility to set docker variable IOTA_REGISTRY_TYPE- Whether to hold IoT device info in memory or in a database (mongodb by default). Documentation that I'm referencing.

Firstly I would like to have it set for memory and what would it imply?
Could the data be preserved only in some allocated part of memory within docker env.? Could I omit further variables within configuration file, like IOTA_MONGO_HOST (The hostname of mongoDB - used for holding device information).

Architecture for my system has raspberry pi running IoT Agent and VM running Orion Context Broker and MongoDB. Both are reachable because they see each other in LAN. Is it necessary for MongoDB to be the same database for IoT Agent and Orion Context Broker if they are linked?

Is it possible to run IoT Agent with memory only type of device information persistence (instead of database type)? Will it have any effect on whole infrastructure running besides of obvious lack of device data holding?