Hi

Say I create an index with 20 shards.

During indexing, if I specify a routing_key as 0, will it be indexed in 
shardId 0? Will routing_key 3 correspond to shard Id 3? Similarly for all 
other keys if I have 20 unique routing values since 0 % 20 will be 0 and 3 
% 20 will be 3, etc.

There is no hash but a specific set of routing keys [0..19] = number of 
shards [0..19] that I have.

Is this deterministic and documented by ES regarding this routing key to 
shard Id behavior? Or is it internal to ES and changeable anytime?

Please let me know soon!! Thanks in advance...

Thanks,
Sandeep

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