In a cluster with 20 servers @ 256GB RAM hosting a single JVM at 30G, what would be the procedure for converting to 4 JVMs per node ?

If we take one host out, reconfigure it w/ the appropriate shard awareness stuff, and start up the 4 new instances, will Elasticsearch allocate 4x as many shards to this server, causing a hotspot until we can repeat for the rest of the servers ?
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