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Oracle VM Server for SPARC 2.1 Administration Guide     Oracle VM Server for SPARC
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Document Information


Part I Oracle VM Server for SPARC 2.1 Software

1.  Overview of the Oracle VM Server for SPARC Software

2.  Installing and Enabling Software

3.  Security

4.  Setting Up Services and the Control Domain

5.  Setting Up Guest Domains

6.  Setting Up I/O Domains

7.  Using Virtual Disks

8.  Using Virtual Networks

9.  Migrating Domains

10.  Managing Resources

Resource Reconfiguration

Dynamic Reconfiguration

Delayed Reconfiguration

Resource Allocation

CPU Allocation

Enabling the Whole-Core Constraint

Disabling the Whole-Core Constraint

Allocating CPUs to the Control Domain

Interactions Between the Whole-Core Constraint and Other Domain Features

CPU Dynamic Reconfiguration

Dynamic Resource Management

Domain Migration

Power Management

Using Memory Dynamic Reconfiguration

Adding Memory

Removing Memory

Tracking the Progress of a Memory DR Request

Canceling a Memory DR Request

Partial Memory DR Requests

Memory Reconfiguration of the Control Domain

Decrease the Control Domain's Memory

Dynamic and Delayed Reconfiguration

Memory Alignment

Memory Alignment for Active Domains

Memory Alignment for Bound Domains

Memory Alignment for Inactive Domains

Adding Unaligned Memory

Memory DR Examples

Using Power Management

Listing Power-Managed CPU Strands and Virtual CPUs

List Power-Managed CPU Strands

List Power-Managed CPUs

Using Dynamic Resource Management

Listing Domain Resources

Machine-Readable Output

Show Syntax Usage for ldm Subcommands

Flag Definitions

Utilization Statistic Definition

Viewing Various Lists

Show Software Versions (-V)

Generate a Short List

Generate a Long List (-l)

Generate an Extended List (-e)

Generate a Parseable, Machine-Readable List (-p)

Generate a Subset of a Long List (-o format)

List a Variable

List Bindings

List Configurations

List Devices

List Available Memory

List Services

Listing Constraints

List Constraints for One Domain

List Constraints in XML Format

List Constraints in a Machine-Readable Format

11.  Managing Configurations

12.  Performing Other Administration Tasks

Part II Optional Oracle VM Server for SPARC Software

13.  Oracle VM Server for SPARC Physical-to-Virtual Conversion Tool

14.  Oracle VM Server for SPARC Configuration Assistant

15.  Using the Oracle VM Server for SPARC Management Information Base Software

16.  Logical Domains Manager Discovery

17.  Using the XML Interface With the Logical Domains Manager



Resource Reconfiguration

A system that runs the Oracle VM Server for SPARC software is able to configure resources, such as virtual CPUs, virtual I/O devices, cryptographic units, and memory. Some resources can be configured dynamically on a running domain, while others must be configured on a stopped domain. If a resource cannot be dynamically configured on the control domain, you must first initiate a delayed reconfiguration. The delayed reconfiguration postpones the configuration activities until after the control domain has been rebooted.

Dynamic Reconfiguration

Dynamic reconfiguration (DR) enables resources to be added or removed while the operating system (OS) is running. The capability to perform DR of a particular resource type is dependent on having support in the OS running in the logical domain.

Dynamic reconfiguration is supported for the following resources:

To use the DR capability, the Logical Domains DR daemon, drd, must be running in the domain that you want to change. See the drd(1M) man page.

Delayed Reconfiguration

In contrast to DR operations that take place immediately, delayed reconfiguration operations take effect in the following circumstances:

Delayed reconfiguration operations are restricted to the control domain. For all other domains, you must stop the domain to modify the configuration unless the resource can be dynamically reconfigured.

When a delayed reconfiguration is in progress on the control domain, other reconfiguration requests for the control domain are deferred until it is rebooted, or stopped and started.

The ldm cancel-operation reconf command cancels delayed reconfiguration operations on the control domain. For more information about how to use the delayed reconfiguration feature, see the ldm(1M) man page.

Note - You cannot use the ldm cancel-operation reconf command if any other ldm remove-* commands have already performed a delayed reconfiguration operation on virtual I/O devices. The ldm cancel-operation reconf command fails in these circumstances.

You can use delayed reconfiguration to decrease resources on the control domain. To remove a large number of CPUs from the control domain, see Removing a Large Number of CPUs From the Control Domain in Oracle VM Server for SPARC 2.1 Release Notes. To remove large amounts of memory from the control domain, see Decrease the Control Domain's Memory.