If you use Site Recovery Manager to test or recover a large number of virtual machines, you might need to modify the default Site Recovery Manager settings to achieve the best possible recovery times in your environment or to avoid timeouts.
About this task
In large environments, Site Recovery Manager might simultaneously power on or power off large numbers of virtual machines. Simultaneously powering on or powering off large numbers of virtual machines can create a heavy load on the virtual infrastructure, which might lead to timeouts. You can modify certain Site Recovery Manager settings to avoid timeouts, either by limiting the number of power on or power off operations that Site Recovery Manager performs concurrently, or by increasing the timeout periods.
The limits that you set on power on or power off operations depend on how many concurrent power on or power off operations your infrastructure can handle.
You modify certain options in the Advanced Settings menus in the vSphere Client or in the Site Recovery Manager client plug-in. To modify other settings, you edit the vmware-dr.xml configuration file on the Site Recovery Manager Server. Always modify settings by using the client menus when an option exists. If you modify settings, you must make the same modifications on the Site Recovery Manager Server and vCenter Server instances on both the protected and recovery sites.
For descriptions of the settings that you can change, see Settings for Large Site Recovery Manager Environments.
- Right-click a cluster in the vCenter Server Inventory and select .
- Set the srmMaxBootShutdownOps setting.
Option text box
Value text box
Type the maximum number of boot shutdown operations, for example 32. If you set the value to 32, the next guest starts booting or shutting down as soon as one of the first batch of 32 has finished, namely VMs 1 to 32 all start together, then VM 33 starts once one of the first batch has finished, VM 34 starts when the second one of the first batch has finished, and so on.
- Click OK to save your changes.
- Log into the Site Recovery Manager Server host.
- Open the vmware-dr.xml file in a text editor.
You find the vmware-dr.xml file in the C:\Program Files\VMware\VMware vCenter Site Recovery Manager\config folder.
- Change the
defaultMaxBootAndShutdownOpsPerHostsettings in the vmware-dr.xml file:
<config> ... <defaultMaxBootAndShutdownOpsPerCluster>24</defaultMaxBootAndShutdownOpsPerCluster> <defaultMaxBootAndShutdownOpsPerHost>4</defaultMaxBootAndShutdownOpsPerHost> ... </config>
If these elements do not already exist in the vmware-dr.xml file, you can add them anywhere in the
<config>section. If you set the
<defaultMaxBootAndShutdownOpsPerCluster>value to 24, the next guest starts booting or shutting down as soon as one of the first batch of 24 has finished, namely VMs 1 to 24 all start together, then VM 25 starts once one of the first batch has finished, VM 26 starts when the second one of the first batch has finished, and so on.
- Restart the Site Recovery Manager Server to apply the new settings.
- Click Sites in the Site Recovery Manager interface, right-click the site on which to change settings, and select Advanced Settings.
- Select vrReplication and increase the synchronizationTimeout setting.
The default value is 7200 and corresponds to a working synchronization timeout period of 14400 seconds.
- Select storage and increase the commandTimeout setting.
For example, increase the commandTimeout value to 3600 seconds.
- Click OK to save your changes.