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opHA introduces the concept of a master server. & pollers servers:
- The master is the node that have the information of all the pollers and it is where we can read all the information from.
- The pollers, collect their own data, and send that information to the master when it is requested.
The process of synchronising the information of the nodes it is made by the master. The master request the information for each poller with pull requests.
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