Regarding your questions;
1. Does Replica Disk is created for every Desktop deployed in the pOOL ? ( we generally know that replica disk are created one per DS store )
- When you are using local datastores, Horizon creates indeed one replica on each datastore. Multiple desktops used one replica for read actions.
Use the following kb VMware Knowledge Base to review which replica is used for a linked clone
2. Though the replica disk is not visible when we browse in the Datastore using the GUI.
What do you mean with is not visible, when i'm searching on the datastore, there is an folder created with the name of the replica. That folder is filled with two vmdk files.
If i'm misunderstand your questions, please let me know