From my reading it seems that they are fully consistent between the three nodes in their cluster. This seems to suggest that any failure will block writes. It also seems like since each node has a full copy of the index, that means your entire index must exist within the confines of one machine. So how large of an index can you have in reality? Am I missing something?
We can continue to index if one host is down and we can continue to search if two hosts are down.
If a host is down, we are able to continue indexing because of consensus (2/3). When the host will be up again, it will retrieves the missing jobs from the 2 others servers and apply them to be exactly at the same level.