How to calculate sizing for Media agent deduplication partition

Hi @Mansoor , let’s use this post (but no need to post multiple times, just be patient ).

Here’s what you should consider : 

https://documentation.commvault.com/commvault/v11/article?p=111985.htm

(had troubles accessing the doc site, got some timeouts or error 500, looks like site encounters issues, but that’s not the problem here).

So, can you detail what are the point(s) you don’t understand in that page ? 

Maybe also provide elements from your environment, as examples..

@Laurent 

i am going to setup DDB in cloud media agent and have to decide the hardware requirements.

Master server will be in on premise and Media agent will be in cloud.

How to calculate the hardware requirement for DDB partition. 

i am planning to use Large size media agents. Need to understand sizing requirements.

1. what is 1 DDB disk and 2 DDB disk?
2. what is 1 node 2 node 3 node 4 node?
3. what is up to 250 TiB ?
4. i am unable to understand the table?
5. what is parallel data stream?