Created question in FIWARE Q/A platform on 17-02-2016 at 09:02
Please, ANSWER this question AT http://stackoverflow.com/questions/35451531/fiware-data-loss-prevention

Question:
Fiware: Data loss prevention

Description:
I’m working with the 0.27.0 version of context broker. I'm using the Cygnus generic enabler and I have established a MQTT agent that connects external devices to the context broker.

My major concern right now is how to prevent from data loss. I established the context broker and the Cygnus mongodb databases as replica sets, but that won't ensure that all data will be persisted into the databases. I have seen that Cygnus uses Apache flume. Looking at its configuration, the re-injection retries can be configured:

1. Number of channel re-injection retries before a Flume event is definitely discarded (-1 means infinite retries)
   cygnusagent.sources.http-source.handler.events_ttl = -1

¿It is a good idea to establish the retries value to -1? I have read about events re-injected in the channel forever.
¿What can be done to ensure that all the data will be persisted?
¿Is there any functionality into fiware ecosystem oriented to that purpose?