out of curiosity, trying to see if new cloud features can replace what I use now...
how is this (batch) update forwarding solved at cloud level? imagine simple one shard and one replica case, if I fire up DIH update, is this going to be replicated to replica shard? If yes, - is it going to be sent document by document (network, imagine 100Mio+ update commands going to replica from slave for big batches) - somehow batch into "packages" to reduce load - distributed at index level somehow .... This is important case, today with master/slave solr replication, but is not mentioned at http://wiki.apache.org/solr/SolrCloud
