Enabling Multi-Instance Installations

You can install multiple instances of the Commvault software on a computer.

Notes

On a Windows computer, you can have a maximum of 20 instances.
On a UNIX computer, you can have a maximum of 999 instances.

Before You Begin

Determine whether the agent that you want to install supports multi-instancing. For more information, see Multi-Instance Support.
Review requirements, limitations, and other information associated with multi-instancing. For more information, see Considerations for Installing Multi-Instances.

Procedure

Use one of the following methods to enable multi-instance installations on a computer.

Preferred Method: Using the CommCell Console (Remote Installation)

During a remote installation, on the Enter Additional Install Options page of the installation wizard, select the Install new Instance (if required) check box to install a new instance.

For instructions on remote installations, see Installing Commvault Remotely Using the CommCell Console.

Important

Remote installations are not supported for server packages, such as the CommServe, Web Server, and Workflow Engine.
Subsequent installations on the new instance are not supported from the CommCell Console. You must run the installation package to install the software on the instance you want.

Alternative Method: Using the Installation Package (Local Installation)

On Windows computers perform the following steps:
1. Before you run the installation package, create the bAllowMultiInstances registry key to enable the multi-instancing feature on a Windows computer by performing the following:
  1. Open the Windows Registry Editor, and go to the HKEY_LOCAL_MACHINE\SOFTWARE\ directory.
  2. Right-click SOFTWARE, and then click New > Key.
  3. Name the new key GalaxyInstallerFlags.
  4. Right-click GalaxyInstallerFlags, and then click New > DWORD.
  5. Name the new value bAllowMultiInstances.
  6. Double-click bAllowMultiInstances, set the Value data to 1, and then click OK.
  7. Close the Registry Editor.
2. Install a new instance.
  
  During a local installation, on the Install Instance Selection page of the installation wizard, select Create a new instance.
  
  For instructions on local installations, see Installing Commvault Locally on Windows Computers Using the Installation Package.
On UNIX computers, during a local installation, make sure to select the following options:
- On the Install Task dialog, select Install packages on this machine.
- On the Instance Page dialog, select Create new instance.
For instructions on local installations, see Installing Commvault Locally on UNIX, Linux, and Macintosh Computers Using the Installation Package.

Note

Do not use unattended installations to create new instances or on a computer that has multiple instances.

What to Do Next

Caution

Overlapping contents can result in data loss.

For the following agents, verify that there is no overlapping subclient content across instances before you start to perform backups:

Exchange Database
Informix
Oracle
SharePoint Server
Sybase