I am planning to store events in elastic search. It can have around 100 million events at any point time. To de-dupe events, I am planning to create _id column of length 100 chars by concatenating below fields
entity_id - UUID (37 chars) +
event_creation_time (30 chars) +
event_type (30 chars)
This store will be having normal reads & writes along with aggregate queries (no updates / deletes)
Can you please let me know if there would be any performance impact or any other side-effects of using such lengthy string _id columns instead of default Ids.