Each shard is a Lucene instance.
It uses memory, file descriptors, CPU, IO...

You should keep its number per node small.

If you are a RDBMS user, you probably limit the number of databases you manage 
on a single physical machine, right?


HTH

--
David ;-)
Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs

> Le 1 juin 2015 à 13:04, Avinash Pandey <avinashpandey.i...@gmail.com> a écrit 
> :
> 
> There are many variables here like the number of documents, the size of 
> documents. 
> What I want to understand though, is that what are the downsides of having of 
> too many shards for a physical node?
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