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Oracle Solaris Cluster System Administration Guide     Oracle Solaris Cluster 4.1
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Document Information

Preface

1.  Introduction to Administering Oracle Solaris Cluster

2.  Oracle Solaris Cluster and RBAC

3.  Shutting Down and Booting a Cluster

4.  Data Replication Approaches

5.  Administering Global Devices, Disk-Path Monitoring, and Cluster File Systems

Overview of Administering Global Devices and the Global Namespace

Global Device Permissions for Solaris Volume Manager

Dynamic Reconfiguration With Global Devices

Administering Storage-Based Replicated Devices

Administering EMC Symmetrix Remote Data Facility Replicated Devices

How to Configure an EMC SRDF Replication Group

How to Configure DID Devices for Replication Using EMC SRDF

How to Verify EMC SRDF Replicated Global Device Group Configuration

Example: Configuring an SRDF Replication Group for Oracle Solaris Cluster

Overview of Administering Cluster File Systems

Cluster File System Restrictions

Administering Device Groups

How to Update the Global-Devices Namespace

How to Change the Size of a lofi Device That Is Used for the Global-Devices Namespace

Migrating the Global-Devices Namespace

How to Migrate the Global-Devices Namespace From a Dedicated Partition to a lofi Device

How to Migrate the Global-Devices Namespace From a lofi Device to a Dedicated Partition

Adding and Registering Device Groups

How to Add and Register a Device Group (Solaris Volume Manager)

How to Add and Register a Device Group (Raw-Disk)

How to Add and Register a Replicated Device Group (ZFS)

Maintaining Device Groups

How to Remove and Unregister a Device Group (Solaris Volume Manager)

How to Remove a Node From All Device Groups

How to Remove a Node From a Device Group (Solaris Volume Manager)

How to Remove a Node From a Raw-Disk Device Group

How to Change Device Group Properties

How to Set the Desired Number of Secondaries for a Device Group

How to List a Device Group Configuration

How to Switch the Primary for a Device Group

How to Put a Device Group in Maintenance State

Administering the SCSI Protocol Settings for Storage Devices

How to Display the Default Global SCSI Protocol Settings for All Storage Devices

How to Display the SCSI Protocol of a Single Storage Device

How to Change the Default Global Fencing Protocol Settings for All Storage Devices

How to Change the Fencing Protocol for a Single Storage Device

Administering Cluster File Systems

How to Add a Cluster File System

How to Remove a Cluster File System

How to Check Global Mounts in a Cluster

Administering Disk-Path Monitoring

How to Monitor a Disk Path

How to Unmonitor a Disk Path

How to Print Failed Disk Paths

How to Resolve a Disk-Path Status Error

How to Monitor Disk Paths From a File

How to Enable the Automatic Rebooting of a Node When All Monitored Shared-Disk Paths Fail

How to Disable the Automatic Rebooting of a Node When All Monitored Shared-Disk Paths Fail

6.  Administering Quorum

7.  Administering Cluster Interconnects and Public Networks

8.  Adding and Removing a Node

9.  Administering the Cluster

10.  Configuring Control of CPU Usage

11.  Updating Your Software

12.  Backing Up and Restoring a Cluster

A.  Example

Index

Overview of Administering Global Devices and the Global Namespace

Administration of Oracle Solaris Cluster device groups depends on the volume manager that is installed on the cluster. Solaris Volume Manager is “cluster-aware,” so you add, register, and remove device groups by using the Solaris Volume Manager metaset command. For more information, see the metaset(1M) man page.

Oracle Solaris Cluster software automatically creates a raw-disk device group for each disk and tape device in the cluster. However, cluster device groups remain in an offline state until you access the groups as global devices. When administering device groups, or volume manager disk groups, you need to be on the cluster node that is the primary node for the group.

Normally, you do not need to administer the global device namespace. The global namespace is automatically set up during installation and automatically updated during Oracle Solaris OS reboots. However, if the global namespace needs to be updated, you can run the cldevice populate command from any cluster node. This command causes the global namespace to be updated on all other cluster node members, as well as on nodes that might join the cluster in the future.

Global Device Permissions for Solaris Volume Manager

Changes made to global device permissions are not automatically propagated to all the nodes in the cluster for Solaris Volume Manager and disk devices. If you want to change permissions on global devices, you must manually change the permissions on all the nodes in the cluster. For example, if you want to change permissions on global device /dev/global/dsk/d3s0 to 644, you must issue the following command on all nodes in the cluster:

# chmod 644 /dev/global/dsk/d3s0

Dynamic Reconfiguration With Global Devices

You must consider the following issues when completing dynamic reconfiguration (DR) operations on disk and tape devices in a cluster.


Caution

Caution - If the current primary node fails while you are performing the DR operation on a secondary node, cluster availability is impacted. The primary node will have no place to fail over until a new secondary node is provided.


To perform DR operations on global devices, complete the following steps in the order indicated.

Table 5-1 Task Map: Dynamic Reconfiguration With Disk and Tape Devices

Task
For Instructions
1. If a DR operation that affects an active device group must be performed on the current primary node, switch the primary and secondary nodes before performing the DR remove operation on the device
2. Perform the DR removal operation on the device being removed
Check the documentation that came with your system.