Stopping replication on a HyperSwap topology system or an auxiliary-far site for maintenance

Edit online

Before you can complete maintenance on a HyperSwap® system or the system at the auxiliary-far site in a 3-site configuration, you must stop replication. After the maintenance tasks are complete, you can restart replication in the 3-site configuration.

When you are completing system maintenance, such as replacing hardware, you can use the management GUI or the command-line interface to stop and restart replication.

Note: Application I/O can continue on the production volume while you are upgrading the auxiliary-near sites or auxiliary-far site.

Using the management GUI

To stop replication in the management GUI, complete these steps:
  1. In the management GUI, select Copy Services > Remote Copy.
  2. On the 3-Site Partnership page, select a 3-site consistency group to open the details page for the group.
  3. Select Actions > Stop Group.
  4. Click Confirm.
  5. When the process completes, verify that graphic for the overall 3-site consistency group shows that asynchronous copy as stopped.
  6. Repeat these steps for all of the 3-site consistency groups in the 3-site partnership.

After you verify that all the 3-site consistency groups are stopped, complete the system maintenance tasks on the system. When the system maintenance tasks are complete, use the management GUI to restart replication on the 3-site consistency groups.

To start 3-site consistency groups, complete these steps:
  1. In the management GUI, select Copy Services > Remote Copy.
  2. On the details page for the 3-site partnership, select a 3-site consistency group to open the details page for the group.
  3. Select Actions > Start Group.
  4. Click Start.

Using the command-line interface

To complete system maintenance on a system on the auxiliary-far site in the command-line interface, complete these steps:
  1. To stop the 3-site consistency group, enter the following command:
    stop3sitercconsistgrp <3site_consistency_group_name>
    where <3site_consistency_group_name> is the name of the 3-site consistency group that you are adding the HyperSwap relationship with data to.
  2. To verify that the 3-site consistency group is stopped, enter the following commands:
    ls3sitercconsistgrp
name state primary periodic_copy_source sync_copy_state periodic_copy_state freeze_time cycle_period status
rccstgrp0 stopped threesite_hs site1 consistent_synchronized idling 2022/01/20/21/08/35 300 online
    In the results, the sync_copy_state is in consistent_synchronized and the state is in stopped state.
  3. Note: This command stops 3-site replication to the auxiliary-far site only. It does not stop HyperSwap replication.
  4. Enter the start3sitercconsistgrp <3site_consistency_group_name> command after maintenance of a HyperSwap topology system or an auxiliary-far site is complete. 
    # start3sitercconsistgrp rcrel0
#ls3sitercrelationship | grep rccstgrp0
name     consistgrp master_vdisk_id auxnear_vdisk_id auxfar_vdisk_id sync_copy_progress periodic_copy_progress status
rcrel0   rccstgrp0  0               1                0                                  100                    complete