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Oracle Solaris Cluster Concepts Guide     Oracle Solaris Cluster 4.0
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Document Information


1.  Introduction and Overview

2.  Key Concepts for Hardware Service Providers

3.  Key Concepts for System Administrators and Application Developers

Administrative Interfaces

Cluster Time

Campus Clusters

High-Availability Framework

Global Devices

Device IDs and DID Pseudo Driver

Zone Cluster Membership

Cluster Membership Monitor

Failfast Mechanism

Cluster Configuration Repository (CCR)

Device Groups

Device Group Failover

Device Group Ownership

Global Namespace

Local and Global Namespaces Example

Cluster File Systems

Using Cluster File Systems

HAStoragePlus Resource Type

syncdir Mount Option

Disk Path Monitoring

DPM Overview

Monitoring Disk Paths

Using the cldevice Command to Monitor and Administer Disk Paths

Using the clnode set Command to Manage Disk Path Failure

Quorum and Quorum Devices

About Quorum Vote Counts

About Quorum Configurations

Adhering to Quorum Device Requirements

Adhering to Quorum Device Best Practices

Recommended Quorum Configurations

Quorum in Two-Node Configurations

Quorum in Greater Than Two-Node Configurations

Load Limits

Data Services

Data Service Methods

Failover Data Services

Scalable Data Services

Load-Balancing Policies

Failback Settings

Data Services Fault Monitors

Developing New Data Services

Characteristics of Scalable Services

Data Service API and Data Service Development Library API

Using the Cluster Interconnect for Data Service Traffic

Resources, Resource Groups, and Resource Types

Resource Group Manager (RGM)

Resource and Resource Group States and Settings

Resource and Resource Group Properties

Support for Oracle Solaris Zones

Support for Solaris Zones on Oracle Solaris Cluster Nodes Through Oracle Solaris Cluster HA for Solaris Zones

Criteria for Using Oracle Solaris Cluster HA for Solaris Zones

Requirements for Using Oracle Solaris Cluster HA for Solaris Zones

Additional Information About Oracle Solaris Cluster HA for Solaris Zones

Service Management Facility

System Resource Usage

System Resource Monitoring

Control of CPU

Viewing System Resource Usage

Data Service Project Configuration

Determining Requirements for Project Configuration

Setting Per-Process Virtual Memory Limits

Failover Scenarios

Two-Node Cluster With Two Applications

Two-Node Cluster With Three Applications

Failover of Resource Group Only

Public Network Adapters and IP Network Multipathing

SPARC: Dynamic Reconfiguration Support

SPARC: Dynamic Reconfiguration General Description

SPARC: DR Clustering Considerations for CPU Devices

SPARC: DR Clustering Considerations for Memory

SPARC: DR Clustering Considerations for Disk and Tape Drives

SPARC: DR Clustering Considerations for Quorum Devices

SPARC: DR Clustering Considerations for Cluster Interconnect Interfaces

SPARC: DR Clustering Considerations for Public Network Interfaces


Load Limits

You can enable the automatic distribution of resource group load across nodes by setting load limits. You can configure a set of load limits for each cluster node. You assign load factors to resource groups, and the load factors correspond to the defined load limits of the nodes. Each resource group is started on a node from its node list. The RGM chooses a node that best satisfies the configured load distribution policy. As resource groups are assigned to nodes by the RGM, the resource groups' load factors on each node are summed up to provide a total load. The total load is then compared against that node's load limits.

The default behavior is to distribute resource group load evenly across all the available nodes in the resource group's node list. You can configure load limits in a global cluster or a zone cluster.

For instructions on how to configure load limits using the command line, see How to Configure Load Limits on a Node in Oracle Solaris Cluster System Administration Guide. For instructions on how to configure load limits using the clsetup utility, see Oracle Solaris Cluster Software Installation Guide.