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Oracle Solaris Cluster Geographic Edition Data Replication Guide for EMC Symmetrix Remote Data Facility     Oracle Solaris Cluster 4.1
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Document Information

Preface

1.  Replicating Data With EMC Symmetrix Remote Data Facility Software

2.  Administering SRDF Protection Groups

Strategies for Creating SRDF Protection Groups

Creating a Protection Group While the Application Is Offline

Creating a Protection Group While the Application Is Online

Creating, Modifying, Validating, and Deleting an SRDF Protection Group

How to Create and Configure an SRDF Protection Group

Requirements to Support Oracle Real Application Clusters With Data Replication Software

How to Create a Protection Group for Oracle Real Application Clusters

How the Data Replication Subsystem Validates the Device Group

How to Modify an SRDF Protection Group

Validating an SRDF Protection Group

How to Validate an SRDF Protection Group

How to Delete an SRDF Protection Group

How to Create a Protection Group That Does Not Require Data Replication

Administering SRDF Application Resource Groups

How to Add an Application Resource Group to an SRDF Protection Group

How to Delete an Application Resource Group From an SRDF Protection Group

Administering SRDF Data Replication Device Groups

How to Add a Data Replication Device Group to an SRDF Protection Group

Validations Made by the Data Replication Subsystem

How the State of the SRDF Device Group Is Validated

Determining the State of an Individual SRDF Device Group

Determining the Aggregate SRDF Device Group State

Determining the SRDF Pair State

How to Modify an SRDF Data Replication Device Group

How to Delete a Data Replication Device Group From an SRDF Protection Group

Replicating the SRDF Protection Group Configuration to a Partner Cluster

How to Replicate the SRDF Protection Group Configuration to a Partner Cluster

Activating an SRDF Protection Group

How to Activate an SRDF Protection Group

Deactivating an SRDF Protection Group

How to Deactivate an SRDF Protection Group

Resynchronizing an SRDF Protection Group

How to Resynchronize a Protection Group

Checking the Runtime Status of SRDF Data Replication

Displaying an SRDF Runtime Status Overview

How to Check the Overall Runtime Status of Replication

Displaying a Detailed SRDF Runtime Status

3.  Migrating Services That Use SRDF Data Replication

A.  Geographic Edition Properties for SRDF

Index

Creating, Modifying, Validating, and Deleting an SRDF Protection Group

This section contains the following topics:


Note - You can create protection groups that are not configured to use data replication. To create a protection group that does not use a data replication subsystem, omit the -d datareplicationtype option when you use the geopg command. The geoadm status command shows a state for these protection groups of Degraded.

For more information, see Creating a Protection Group That Does Not Require Data Replication in Oracle Solaris Cluster Geographic Edition System Administration Guide.


How to Create and Configure an SRDF Protection Group

Before You Begin

Before you create a protection group, ensure that the following conditions are met:


Note - Protection group names are unique in the global Geographic Edition namespace. You cannot use the same protection group name in two partnerships on the same system.


You can also replicate the existing configuration of a protection group from a remote cluster to the local cluster. For more information, see Replicating the SRDF Protection Group Configuration to a Partner Cluster.

  1. Log in to a cluster node.

    You must be assigned the Geo Management RBAC rights profile to complete this procedure. For more information about RBAC, see Geographic Edition Software and RBAC in Oracle Solaris Cluster Geographic Edition System Administration Guide.

  2. Create a new protection group that uses SRDF replication by using the geopg create command.

    This command creates a protection group on all nodes of the local cluster.

    # geopg create -s partnershipname -o localrole -d srdf [-p property [-p...]] \
    protectiongroupname
    -s partnershipname

    Specifies the name of the partnership.

    -o localrole

    Specifies the role of this protection group on the local cluster as either primary or secondary.

    -d srdf

    Specifies that the protection group data is replicated by the SRDF software.

    -p propertysetting

    Specifies the properties of the protection group.

    You can specify the following properties:

    • Description – Describes the protection group.

    • Timeout – Specifies the time-out period for the protection group in seconds.

    • Nodelist – Lists the host names of the machines that can be primary for the replication subsystem.

    For more information about the properties you can set, see Appendix A, Standard Geographic Edition Properties, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

    protectiongroupname

    Specifies the name of the protection group.

    For information about the names and values that are supported by Geographic Edition software, see Appendix B, Legal Names and Values of Geographic Edition Entities, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

    For more information about the geopg command, refer to the geopg(1M) man page.

Example 2-2 Creating an SRDF Protection Group for Application Resource Groups That Are Online

This example creates an SRDF protection group, srdfpg, for an application resource group, resourcegroup1, that is currently online on cluster-newyork.

  1. Create the protection group without the application resource group.

    # geopg create -s paris-newyork-ps -o primary -d srdf \
    -p nodelist=phys-paris-1,phys-paris-2 srdfpg
  2. Activate the protection group.

    # geopg start -e local srdfpg
  3. Add the application resource group.

    # geopg add-resource-group resourcegroup1 srdfpg

Requirements to Support Oracle Real Application Clusters With Data Replication Software

Geographic Edition software supports Oracle Real Application Clusters (Oracle RAC) with SRDF software. Observe the following requirements when you configure Oracle RAC:

How to Create a Protection Group for Oracle Real Application Clusters

Before You Begin

Before you create a protection group for Oracle Real Application Clusters (Oracle RAC), ensure that the following conditions are met:

  1. Log in to a cluster node on the primary cluster.

    You must be assigned the Geo Management RBAC rights profile to complete this procedure. For more information about RBAC, see Geographic Edition Software and RBAC in Oracle Solaris Cluster Geographic Edition System Administration Guide.

  2. Create a new protection group by using the geopg create command.

    This command creates a protection group on all nodes of the local cluster.

    # geopg create -s partnershipname \
    -o localrole \
    -d srdf \
    -p External_Dependency_Allowed=true \
    [-p property [-p...]] \
    protectiongroupname
    -s partnershipname

    Specifies the name of the partnership.

    -o localrole

    Specifies the role of this protection group on the local cluster as primary.

    -d srdf

    Specifies that the protection group data is replicated by the SRDF software.

    -p propertysetting

    Specifies the properties of the protection group.

    You can specify the following properties:

    • Description – Describes the protection group.

    • External_Dependency_Allowed - Specifies whether to allow any dependencies between resource groups and resources that belong to this protection group and resource groups and resources that do not belong to this protection group. For Oracle RAC, set this property to true.

    • Timeout – Specifies the timeout period for the protection group in seconds.

    • Nodelist – Lists the host names of the machines that can be primary for the replication subsystem.

    For more information about the properties you can set, see Appendix A, Standard Geographic Edition Properties, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

    protectiongroupname

    Specifies the name of the protection group.

    For information about the names and values that are supported by Geographic Edition software, see Appendix B, Legal Names and Values of Geographic Edition Entities, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

    For more information about the geopg command, refer to the geopg(1M) man page.

  3. Add an SRDF device group to the protection group.
    # geopg add-device-group [-p property [-p...]] protectiongroupname
    -p propertysetting

    Specifies the properties of the protection group.

    For more information about the properties you can set, see Appendix A, Standard Geographic Edition Properties, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

    protectiongroupname

    Specifies the name of the protection group.

  4. Add to the protection group only the rac_server_proxy resource group and the resource groups for device groups that are replicated.

    Note - Do not add the RAC framework resource group to the protection group. This ensures that, if the protection group becomes secondary on the node, the framework resource group does not become unmanaged. In addition, multiple RAC databases can be on the cluster, and the databases can be under Geographic Edition control or not under its control.


    # geopg add-resource-group resourcegroup protectiongroupname
    resourcegroup

    Specifies a comma-separated list of resource groups to add to or delete from the protection group. The specified resource groups must already be defined.

    The protection group must be online before you add a resource group. The geopg add-resource-group command fails when a protection group is offline and the resource group that is being added is online.


    Note - If a protection group has already been started at the time that you add a resource group, the resource group remains unmanaged. You must start the resource group manually by running the geopg start command.


    protectiongroupname

    Specifies the name of the protection group.

How the Data Replication Subsystem Validates the Device Group

The Geographic Edition data replication layer validates the protection group's replication role against the configuration of the SRDF RDF1 and RDF2 devices. If the configurations do not match, the validation returns an error.

If the Cluster_dgs property is specified, then the data replication layer verifies that the device group specified is a valid Oracle Solaris Cluster device group. The data replication layer also verifies that the device group is of a valid type.


Note - The device groups that are specified in the Cluster_dgs property must be written to only by applications that belong to the protection group. This property must not specify device groups that receive information from applications outside the protection group.


An Oracle Solaris Cluster replication resource group is automatically created when the protection group is created.


Caution

Caution - Do not change, remove, or bring offline these resources or resource groups. Use only Geographic Edition commands to administer replication resource groups and resources that are internal entities managed by Geographic Edition software. Altering the configuration or state of these entities directly with Oracle Solaris Cluster commands could result in unrecoverable failure.


How to Modify an SRDF Protection Group

Before You Begin

Before modifying the configuration of your protection group, ensure that the protection group you want to modify exists locally.

  1. Log in to one of the cluster nodes.

    You must be assigned the Geo Management RBAC rights profile to complete this procedure. For more information about RBAC, see Geographic Edition Software and RBAC in Oracle Solaris Cluster Geographic Edition System Administration Guide.

  2. Modify the configuration of the protection group.

    This command modifies the properties of a protection group on all nodes of the local cluster. If the partner cluster contains a protection group of the same name, this command also propagates the new configuration information to the partner cluster.

    # geopg set-prop -p property [-p...] protectiongroupname
    -p propertysetting

    Specifies the properties of the protection group.

    For more information about the properties you can set, see Appendix A, Standard Geographic Edition Properties, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

    protectiongroupname

    Specifies the name of the protection group.

    For information about the names and values that are supported by Geographic Edition software, see Appendix B, Legal Names and Values of Geographic Edition Entities, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

    For more information about the geopg command, refer to the geopg(1M) man page.

Example 2-3 Modifying the Configuration of a Protection Group

This example modifies the Timeout property of the protection group srdfpg.

# geopg set-prop -p Timeout=2700 srdfpg

Validating an SRDF Protection Group

During protection group validation, the SRDF data replication layer of the Geographic Edition software validates the following:

When the geoadm status output displays that the Configuration status of a protection group is Error, you can validate the configuration by using the geopg validate command. This command checks the current state of the protection group and its entities.

If the protection group and its entities are valid, then the Configuration status of the protection groups is set to OK. If the geopg validate command finds an error in the configuration files, then the command displays a message about the error and the configuration remains in the error state. In such a case, you can fix the error in the configuration, and run the geopg validate command again.

How to Validate an SRDF Protection Group

Before You Begin

Ensure that the protection group you want to validate exists locally and that the common agent container is online on all nodes of both clusters in the partnership.

  1. Log in to one of the cluster nodes.

    You must be assigned the Geo Management RBAC rights profile to complete this procedure. For more information about RBAC, see Geographic Edition Software and RBAC in Oracle Solaris Cluster Geographic Edition System Administration Guide.

  2. Validate the configuration of the protection group.

    This command validates the configuration of the protection group on the local cluster only. To validate the protection group configuration on the partner cluster, run the command again on the partner cluster.

    # geopg validate protectiongroupname 
    protectiongroupname

    Specifies a unique name that identifies a single protection group

Example 2-4 Validating the Configuration of a Protection Group

This example validates the protection group srdfpg.

# geopg validate srdfpg

How to Delete an SRDF Protection Group

Before You Begin

If you want to delete the protection group everywhere, you must run the geopg delete command on each cluster where the protection group exists.

Before deleting a protection group, ensure that the following conditions are met:


Note - You must remove the application resource groups from the protection group in order to keep the application resource groups online while deleting the protection group. See Example 2-9 for examples of this procedure.


  1. Log in to one of the nodes on the primary cluster, cluster-paris.

    You must be assigned the Geo Management RBAC rights profile to complete this procedure. For more information about RBAC, see Geographic Edition Software and RBAC in Oracle Solaris Cluster Geographic Edition System Administration Guide.

  2. Delete the protection group.

    This command deletes the configuration of the protection group from the local cluster. The command also removes the replication resource group for each SRDF device group in the protection group. This command does not alter the pair state of the SRDF device group.

    # geopg delete protectiongroupname 
    protectiongroupname

    Specifies the name of the protection group

  3. To also delete the protection group on the secondary cluster, repeat step 1 and step 2 on cluster-newyork.

Example 2-5 Deleting a Protection Group

This example deletes a protection group srdfpg from both partner clusters. The protection group is offline on both partner clusters.

In this example, phys-paris-1 is a node of the primary cluster and phys-newyork-1 is a node of the secondary cluster. For a reminder of the sample cluster configuration, see Example Geographic Edition Cluster Configuration in Oracle Solaris Cluster Geographic Edition System Administration Guide.

# rlogin phys-paris-1 -l root
phys-paris-1# geopg delete srdfpg
# rlogin phys-newyork-1 -l root
phys-newyork-1# geopg delete srdfpg

Example 2-6 Deleting an SRDF Protection Group While Keeping Application Resource Groups Online

This example keeps online two application resource groups, apprg1 and apprg2, while deleting their protection group, srdfpg from both partner clusters. Remove the application resource groups from the protection group, then delete the protection group.

phys-paris-1# geopg remove-resource-group apprg1,apprg2 srdfpg
phys-paris-1# geopg stop -e global srdfpg 
phys-paris-1# geopg delete srdfpg
phys-newyork-1# geopg delete srdfpg

How to Create a Protection Group That Does Not Require Data Replication

Before You Begin

Ensure that the following conditions are met:


Note - Protection group names are unique in the global Geographic Edition namespace. You cannot use the same protection group name in two partnerships on the same system.


  1. Log in to a cluster node.

    You must be assigned the Geo Management RBAC rights profile to complete this procedure. For more information about RBAC, see Geographic Edition Software and RBAC in Oracle Solaris Cluster Geographic Edition System Administration Guide.

  2. Create a new protection group by using the geopg create command.

    This command creates a protection group on all nodes of the local cluster.

    # geopg create -s partnershipname -o localrole \
    [-p property [-p...]] \
    protectiongroupname
    -s partnershipname

    Specifies the name of the partnership.

    -o localrole

    Specifies the role of this protection group on the local cluster as either Primary or Secondary.

    -p propertysetting

    Specifies the properties of the protection group.

    You can set the following properties:

    • Description – Describes the protection group.

    • Timeout – Specifies the time-out period for the protection group in seconds.

    • Nodelist – Lists the host names of the machines that can be primary for the replication subsystem.

    For more information about the properties you can set, see Appendix A, Standard Geographic Edition Properties, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

    protectiongroupname

    Specifies the name of the protection group.

    For information about the names and values that are supported by Geographic Edition software, see Appendix B, Legal Names and Values of Geographic Edition Entities, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

    For more information about the geopg command, refer to the geopg(1M) man page.

Example 2-7 Creating and Configuring a Protection Group That Is Not Replicated

This example creates a protection group that is not replicated.

# geopg create -s paris-newyork-ps -o primary example-pg

Next Steps

See Administering SRDF Application Resource Groups for information on adding resource groups to a protection group.