This section explains the overcommit function for L-Servers.
Overcommit
The Citrix-Xen overcommit function for the CPU and memory is available on Resource Orchestrator.
The Citrix-Xen overcommit function for the CPU and memory virtually allows a guest OS to use more resources than that of the actual CPU and memory of a server.
Resource Orchestrator provides the following functions to utilize the Citrix-Xen overcommit function when creating L-Servers.
Setting an overcommit attribute for a resource pool
Overcommit attributes can be set for resource pools. If an L-Server template with the overcommit attribute configured is used, an L-Server with the overcommit attribute configured can be created by selecting the resource from the resource pool with overcommit configured.
Deployment of L-Servers with more resources than those of the server
Creation of an L-Server with more resources than that of the actual CPU or memory installed on a server is possible.
Whether the resulting L-Server can be started depends on the resources available on the VM host.
Installation Procedure
Create a VM Pool for Overcommit
For details on how to create a VM pool, refer to "Chapter 20 Resource Pool Operations" in the "User's Guide for Infrastructure Administrators (Resource Management) CE".
Point
Refer to the "Point" described in "1. Create a VM Pool for Overcommit" in "Installation Procedure" in "C.2.11 Overcommit".
Note
Refer to the "Note" described in "1. Create a VM Pool for Overcommit" in "Installation Procedure" in "C.2.11 Overcommit".
Create a VM Specific Information Definition File
Create a VM specific information definition file. Create a VM specific information definition file when configuring different settings for individual user groups without configuring overcommit settings on the L-Server template.
For VM specific information definition files, refer to "C.1 Definition Files Commonly Shared when Creating Virtual L-Servers".
For details on how to edit the L-Server template, or create and check an L-Server, perform the operations of step 3 and later described in "C.2.11 Overcommit". Since the values that can be configured in the L-Server template or the VM specific information definition files as described in the reference differ depending on the VM types, replace the values with ones for Citrix-Xen.
