What is the rule for primary shard allocation for single index?
I created one index with 9 primary and 0 replica shards.
Elasticsearch allocated 5 primary shards on ES01 server (the node with
least storage available) and 4 more shards on different nodes.
I have 9 servers. For this index only 5 servers are in use.
I don't think this is a correct behavior .
The free space is pretty much even on every host, except ES01 (i still
don't understand why), and i did't hit any hi/low watermarks.
Any idea what is happening here ?
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