i'm refering to Building Scalable Web Applications by Brett Slatkin
regarding building  comments system that need fast write.



1. May i know whether my  understanding correct, creating multiple
entity class like below and randomly write to each of it ?

example

commentA entity class,   commentB entity class,  commentC entity
class.


2. how to combine the results from all these classes and list the
comments by date? I dont understanding this part. any sample code on
this?


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