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Oracle Solaris Cluster Geographic Edition Remote Replication Guide for Sun ZFS Storage Appliance     Oracle Solaris Cluster 4.1
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Document Information

Preface

1.  Configuring and Administering Sun ZFS Storage Appliance Protection Groups

2.  Migrating Services That Use Sun ZFS Storage Appliance Remote Replication

Detecting Cluster Failure on a System That Uses Sun ZFS Storage Appliance Remote Replication

Detecting Primary Cluster Failure

Detecting Secondary Cluster Failure

Migrating Services That Use Sun ZFS Storage Appliance Remote Replication With a Switchover

How to Switch Over Sun ZFS Storage Appliance Remote Replication From the Primary Cluster to the Secondary Cluster

Actions Performed by the Geographic Edition Software During a Switchover

Forcing a Takeover on a System That Uses Sun ZFS Storage Appliance Remote Replication

How to Force Immediate Takeover of Sun ZFS Storage Appliance Services by a Secondary Cluster

Recovering Services to a Cluster on a System That Uses Sun ZFS Storage Appliance Replication

Overview of Recovering Services

How to Resynchronize and Revalidate the Protection Group Configuration

How to Perform a Failback-Switchover on a System That Uses Sun ZFS Storage Appliance Replication

How to Perform a Failback-Takeover on a System That Uses Sun ZFS Storage Appliance Replication

Recovering From a Sun ZFS Storage Appliance Remote Replication Error

How to Detect Remote Replication Errors

How to Recover From a Sun ZFS Storage Appliance Remote Replication Error

Index

Forcing a Takeover on a System That Uses Sun ZFS Storage Appliance Remote Replication

Perform a takeover when applications need to be brought online on the secondary cluster, regardless of whether the data is completely consistent between the primary Sun ZFS Storage appliance and the secondary appliance. The information in this section assumes that the protection group has been started.

The following steps occur after you initiate a takeover:

For more details about takeover and the effects of the geopg takeover command, see Appendix C, Disaster Recovery Administration Example, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

For details about the possible conditions of the primary and secondary cluster before and after a takeover, see Appendix D, Takeover Postconditions, in Oracle Solaris Cluster Geographic Edition System Administration Guide.

How to Force Immediate Takeover of Sun ZFS Storage Appliance Services by a Secondary Cluster

Before You Begin

Before you force the secondary cluster to assume the activity of the primary cluster, ensure that the following conditions are met:

Perform this procedure from a node in the secondary cluster.

  1. Assume the root role or assume a role that is assigned the Geo Management RBAC rights profile.

    For more information about RBAC, see Geographic Edition Software and RBAC in Oracle Solaris Cluster Geographic Edition System Administration Guide.


    Note - If you use a role with Geo Management RBAC rights, ensure that the /var/cluster/geo ACLs are correct on each node of both partner clusters. If necessary, assume the root role on the cluster node and set the correct ACLs.

    # chmod A+user:username:rwx:allow /var/cluster/geo

    The /var/cluster/geo directory must have the correct access control lists (ACL) applied for compatibility between the Geo Management RBAC rights profile and Sun ZFS Storage Appliance software.


  2. Initiate the takeover.
    phys-newyork-1# geopg takeover [-f] pg-name
    -f

    Forces the command to perform the operation without your confirmation.

    pg-name

    Specifies the name of the protection group.

Example 2-2 Forcing a Takeover by a Secondary Cluster

The following example forces the takeover of the protection group zfssa-pg by the secondary cluster cluster-newyork.

The node phys-newyork-1 is the first node of the secondary cluster. For a reminder of which node is phys-newyork-1, see Example Geographic Edition Cluster Configuration in Oracle Solaris Cluster Geographic Edition System Administration Guide.

phys-newyork-1# geopg takeover -f zfssa-pg

Next Steps

For information about the state of the primary and secondary clusters after a takeover, see Appendix D, Takeover Postconditions, in Oracle Solaris Cluster Geographic Edition System Administration Guide.