System requirements

The following table summarizes disk space and memory requirements for typical installation cases. The installation is performed with the default settings.

Components to be installed	Disk space required for installation	Minimum memory consumption
Agent for Windows	850 MB	150 MB
Agent for Windows and one of the following agents: Agent for SQL Agent for Exchange	950 MB	170 MB
Agent for Windows and one of the following agents: Agent for VMware (Windows) Agent for Hyper-V	1170 MB	180 MB
Agent for Office 365	500 MB	170 MB
Agent for Linux	2.0 GB	130 MB
Agent for Mac	500 MB	150 MB
For on-premises deployments only
Management Server in Windows	1.7 GB	700 MB + 2.3 MB per connected agent
Management Server in Linux	1.5 GB	700 MB + 2.3 MB per connected agent
Management Server and Agent for Windows	2.4 GB	860 MB + 2.3 MB per connected agent
Management Server and agents on a machine running Windows, Microsoft SQL Server, Microsoft Exchange Server, and Active Directory Domain Services	3.35 GB	900 MB + 2.3 MB per connected agent
Management Server and Agent for Linux	4.0 GB	840 MB + 2.3 MB per connected agent
Storage Node and Agent for Windows 64-bit platform only To use deduplication, minimum 8 GB of RAM are required. For more information, see Deduplication best practices.	1.1 GB	330 MB

While backing up, an agent typically consumes about 350 MB of memory (measured during a 500-GB volume backup). The peak consumption may reach 2 GB, depending on the amount and type of data being processed.

Backup operations, including deleting backups, require about 1 GB of RAM per 1 TB of backup size. The memory consumption may vary, depending on the amount and type of data being processed by the agents.

The RAM usage might increase when backing up to extra large backup sets (4 TB and more).

On x64 systems, operations with bootable media and disk recovery with restart require at least 2 GB of memory.

A management server with one registered agent uses about 702 MB of memory. Each additional agent adds about 2.3 MB. Thus, a server with 100 registered agents consumes approximately 930 MB above the operating system and running applications.

You can register up to 1000 agents on a management server that uses the embedded SQLite database.

You can register up to 8000 agents without significant performance degradation on a management server that uses an external Microsoft SQL Server database. With 8000 registered agents, the SQL Server instance will consume about 8 GB of RAM.

For better backup performance, manage the agents by groups, with up to 500 agents in each group.