Sun Cluster Geographic Edition Data Replication Guide for EMC Symmetrix Remote Data Facility

Deactivating an EMC Symmetrix Remote Data Facility Protection Group

You can deactivate a protection group on the following levels:

Globally – Deactivates a protection group on both clusters where the protection group is configured.
On the primary cluster only – Secondary cluster remains active.
On the secondary cluster only – Primary cluster remains active.

Deactivating an EMC Symmetrix Remote Data Facility protection group on a cluster has the following effect on the data replication layer:

The data replication configuration of the protection group is validated. During validation, the current local role of the protection group is compared with the aggregate device group state. If validation is successful, data replication is stopped.
Data replication is stopped on the data replication device groups that are configured for the protection group, whether the deactivation occurs on a primary or secondary cluster.

Deactivating a protection group has the following effect on the application layer:

When a protection group is deactivated on the primary cluster, all of the application resource groups configured for the protection group are stopped and unmanaged.
When a protection group is deactivated on the secondary cluster, the resource groups on the secondary cluster are not affected. Application resource groups that are configured for the protection group might remain active on the primary cluster, depending on the activation state of the primary cluster.

The EMC Symmetrix Remote Data Facility command that is used to stop data replication depends on the RDF state of the EMC Symmetrix Remote Data Facility device group.

The following table describes the EMC Symmetrix Remote Data Facility command that is used to stop data replication for each of the possible combinations of factors.

Table 2–3 Commands Used to Stop EMC Symmetrix Remote Data Facility Data Replication


Aggregate Device Group State	Valid Local Protection Group Role	EMC Symmetrix Remote Data Facility Command
`Split`, `Suspended, Partitioned,` or `Failover`	`primary` or `secondary`	No command is run because no data is being replicated.
`Synchronized` or `R1Updated`	`primary` or `secondary`	The `symrdf split` command is run.

How to Deactivate an EMC Symmetrix Remote Data Facility Protection Group

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 Sun Cluster Geographic Edition Software and RBAC in Sun Cluster Geographic Edition System Administration Guide.

Deactivate the protection group.

When you deactivate a protection group on the primary cluster, its application resource groups are also taken offline.
# geopg stop -e scope [-D] protectiongroupname
-e scope

Specifies the scope of the command.

If the scope is Local, then the command operates on the local cluster only. If the scope is Global, the command operates on both clusters where the protection group is deployed.

Note –
The property values, such as Global and Local, are not case sensitive.

-D

Specifies that only data replication should be stopped and the protection group should be online.

If you omit this option, the data replication subsystem and the protection group are both stopped.

protectiongroupname

Specifies the name of the protection group.

Example 2–17 How the Sun Cluster Geographic Edition Software Issues the Command to Stop Replication

This example illustrates how the Sun Cluster Geographic Edition software determines the EMC Symmetrix Remote Data Facility command that is used to stop data replication.

The current state of the EMC Symmetrix Remote Data Facility device group, devgroup1, is returned in the output of the symrdf query command as follows:

phys-paris-1# symrdf -g devgroup1 query
Device Group (DG) Name             : devgroup1
DG's Type                          : RDF1
DG's Symmetrix ID                  : 000187401215

       Source (R1) View                 Target (R2) View     MODES           
--------------------------------    ------------------------ ----- ------------
             ST                  LI      ST                                    
Standard      A                   N       A                                   
Logical       T  R1 Inv   R2 Inv  K       T  R1 Inv   R2 Inv       RDF Pair    
Device  Dev   E  Tracks   Tracks  S Dev   E  Tracks   Tracks MDA   STATE       
-------------------------------- -- ------------------------ ----- ------------

DEV001  00E4 RW       0        0 RW 00E4 WD       0        0 S..   Synchronized
DEV002  00E5 RW       0        0 RW 00E5 WD       0        0 S..   Synchronized
DEV003  00E6 RW       0        0 RW 00E6 WD       0        0 S..   Synchronized
DEV004  00E7 RW       0        0 RW 00E7 WD       0        0 S..   Synchronized
DEV005  00E8 RW       0        0 RW 00E8 WD       0        0 S..   Synchronized
DEV006  00E9 RW       0        0 RW 00E9 WD       0        0 S..   Synchronized

A device group, devgroup1, is added to the protection group as follows:

phys-paris-1# geopg add-device-group -p DG_or_CG=DG devgroup1 srdfpg

Next, the protection group, srdfpg, is deactivated by using the geopg stop command.

phys-paris-1# geopg stop -s local srdfpg

The Sun Cluster Geographic Edition software runs the symrdf -g devgroup1 split command at the data replication level.

If the command is successful, the state of devgroup1 is returned in the output of the symrdf query command as follows:

phys-paris-1# symrdf -g devgroup1 query
Device Group (DG) Name             : devgroup1
DG's Type                          : RDF1
DG's Symmetrix ID                  : 000187401215

       Source (R1) View                 Target (R2) View     MODES           
--------------------------------    ------------------------ ----- ------------
             ST                  LI      ST                                    
Standard      A                   N       A                                   
Logical       T  R1 Inv   R2 Inv  K       T  R1 Inv   R2 Inv       RDF Pair    
Device  Dev   E  Tracks   Tracks  S Dev   E  Tracks   Tracks MDA   STATE       
-------------------------------- -- ------------------------ ----- ------------

DEV001  00E4 RW       0        0 NR 00E4 RW       0        0 S..   Split       
DEV002  00E5 RW       0        0 NR 00E5 RW       0        0 S..   Split       
DEV003  00E6 RW       0        0 NR 00E6 RW       0        0 S..   Split       
DEV004  00E7 RW       0        0 NR 00E7 RW       0        0 S..   Split       
DEV005  00E8 RW       0        0 NR 00E8 RW       0        0 S..   Split       
DEV006  00E9 RW       0        0 NR 00E9 RW       0        0 S..   Split

Example 2–18 Deactivating a Protection Group on All Clusters

This example deactivates a protection group on all clusters.

# geopg stop -e global srdfpg

Example 2–19 Deactivating a Protection Group on a Local Cluster

This example deactivates a protection group on the local cluster.

# geopg stop -e local srdfpg

Example 2–20 Stopping Data Replication While Leaving the Protection Group Online

This example stops only data replication on both partner clusters.

# geopg stop -e local -D srdfpg

If the administrator decides later to deactivate both the protection group and its underlying data replication subsystem, the administrator can rerun the command without the -D option:

# geopg stop -e local srdfpg

Example 2–21 Deactivating an EMC Symmetrix Remote Data Facility Protection Group While Keeping Application Resource Groups Online

This example keeps two application resource groups, apprg1 and apprg2, online while deactivating their protection group, srdfpg, on both clusters.

Remove the application resource groups from the protection group.
# geopg remove-resource-group apprg1,apprg2 srdfpg
Deactivate the protection group.
# geopg stop -e global srdfpg