I have a question. We will be migrating our client current Lucene
index to Elasticsearch. Right now, the index contain 3 million
document, with the planned growth of about 1 million a month. Those 3
million of documents is about 350GB in size divided into 4 machines.
We would like to plan the Elasticsearch shard number, to be able to
easily add nodes in the near future. What do you think on about having
40 shards for that amount of data ?