Commvault offers a holistic and unified approach to modern data and information management on its software platform.

Architecture of CommVault

CommServe – It’s otherwise the master server. By default, this will come with MSQL installed on it, and it’s licensed free of charge.

MediaAgent – Its a media server that controls robotic movements like tape, disk library, VTL, cloud library, etc
Client – Most clients will require a backup agent installed on it which will communicate with the master/media server. This agent is responsible for guest introspection. The agent is called the iData Agent
CommCell Console – A console used to typically monitor the entire software activity

Web Console – same as above but data can be viewed via a browser. If we install IIS on Commserv we get the web console
Commvault Storage – a repository for holding data

CommServ Deployment Types

Commvault is deployed in cell-like structures often referred to as Commcell environment. The two common deployment methods are

Single Cell Deployment: As the name suggests, this has one backup master software deployment.
Multi-Cell Deployment: This type of deployment configures the cell environment as a HA pair thus offering resiliency to the backup master server.

CommServ Install Requirements

Extra Large	Large	Medium	Small
Supports 20,000 VM	Supports 5000 VM	Supports 1000 VM	Supports 100 VM
16 CPU cores	12 CPU cores	8 CPU cores	4 CPU cores
128 GB RAM	64 GB RAM	32 GB RAM	16 GB RAM
500 GB of SSD disk space for CommServe database	300 GB of SSD disk space for CommServe database	200 GB of disk space for CommServe database	100 GB of disk space for CommServe database

Command Center and Web console will need the same spec as a Small Commserv deployment

Commvault functions

Backup
Archive

SRM
Snapshot
De-dupe

Search & Index

Logical Architecture of Commvault

Managing Server Groups & Subclient

When we install the agent, a default backup set is created which has all the drives on it but we can be selective and choose what we want and this is called subclient. Subclient let us set different retention policies for data we wish to protect

Types of Commvault Agents

Commvault agents are pushed across from the Admin Console or the Commcell console

Standard Backup Agent	Virtual Server Agent File System backup Application Backup Agent
Archiving Agent	OnePass Agent ( Backup and Archive agent in one ) Complaince archive agent
Others	DLO Continuous Data replicator *( used for replication ) Intellisnap snapshot agent for Storage arrays

Data Protection Plans

Commvault agents are pushed across from the Admin Console or the Commcell console

Full	Virtual Server Agent File System backup Application Backup Agent
Incr	OnePass Agent ( Backup and Archive agent in one ) Complaince archive agent
Diff	DLO Continuous Data replicator *( used for replication ) Intellisnap snapshot agent for Storage arrays (
Synthetic	Synthetic full – consolidate all full+ Incr into one jumbo backup Its the most recent version of full Dash Full – dedicated synthetic full raje
Archive	Worm Media
Auxiliary Dash Copy	Standard Auxillary Copy – From the parameter, we can get it. Dash COPY only unique data is sent from primary to secondary

Server Groups

Let us group servers based on similar requirements.

eg: Active Directory Servers, Exchange Servers, etc

Storage Policy

Commvault storage policies offer policy-based data management for controlling where data gets stored, data multiplexing and multistreaming, retention, what data to protect (sub-client), and number of copies to keep – Onsite copy, Offsite Copy, Tape copy, Cloud copy, etc so in short storage policies control the lifecycle management of data it protects.