Viewing the storage system Topology Details

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You can use the storage system Topology Details panel in the GUI to see more detailed information about relationships between site location and storage systems sessions that are managed by Copy Services Manager.

About this task

This panel shows the topology details that are associated with a session copy role, its site relationship, copy type, consistency group name, and storage system. Table data is refreshed automatically based on the selected items.

Perform these steps to use the Topology Details panel:

Procedure

  1. Log in to the Copy Services Manager GUI.
  2. In the menu bar, click Storage > Topology Details.
    Notes:
    • You can also open the Topology Details panel from the Topology Overview panel when you click the direction arrow for a particular site location and storage system partnership. If you enter this way, then you are taken to a filtered version of the Details panel. The filter is based on the columns on either side of the arrow. For example, if you assume columns on the Overview panel that are denoted by | Site 1 | Storage A | > | Site 2 | Storage B |, then clicking on the arrow filters the pull-down menus on the Details panel to Site 1 > Site 2.
    • When you first enter this detailed view from another panel, it has no filter set on either site because ALL is selected for the source and target. You can use the drop-down selections above the Details table to change the filtering.

    See Viewing the storage system Topology Overview for more information.

  3. On the Topology Details page, you have filters above the table for Source and Target. Select the source site, target site, or both, for the session topology details that you want to view; or select All to view all relationships. You also see a table that lists the following information for each volume:
    Source
    The source storage system and subsystem (that is, LSS or I/O group).
    Source Role
    The role considered a source role in a role pair for a given session.
    Target
    The target storage system and subsystem (that is, LSS or I/O group).
    Target Role
    The role considered a target role in a role pair for a given session.
    Session
    The session that this relationship belongs to.
    Copy Type
    Shows the short name form of the copy type that is associated with this session role pair. The long form is shown when you hover over. The following copy types are possible:
    MM
    Metro Mirror
    GC
    Global Copy
    GM
    Global Mirror
    HS
    HyperSwap
    CG Name
    The consistency group name set for the particular role-pair in the session if one is present. This is a user-defined consistency group name or Global Mirror session ID on DS8000. This field can help you to determine if sessions are sharing a consistency group.
    Use the Filter field in the top right to filter on various views for the table. See the GUI panel help for additional information.
  4. Optional: The configuration refreshes every 30 minutes by default. However, you can also use the Refresh button above the table to manually refresh the configuration whenever you choose.
    Note: You can also set a property to refresh at a higher or lower rate if you go to Settings > Server Properties and edit the properties in the displayed file. The property can be used to change the refresh rate after the next scheduled refresh.

Example

Topology Overview usage scenarios:
  • Find all H1 boxes for session "myself."
  • Find all sessions that use box "ANXR32."
  • Make sure that all connections from ANXR32 LSS 0 to ANZW65 LSS 0 are defined for MM.
  • Determine if the data is flowing between the correct boxes at each site.
  • Determine how many LSSs are using a given LSS as a target for remote copy.
  • Determine which LSSs on a given box are using the same user-defined consistency group name (sharing the same Master session).
  • After receiving an x0F12 or x0f85 error starting a session, filter on the LSS containing the volume and check if another session already has a relationship.
  • After receiving the following error message, you can filter on the session ID to determine what other sessions are already using the consistency group name:
    IWNR2326E
    Message Text:
    [timestamp] The pair in session VALUE_1 for copy set VALUE_2 with source VALUE_3 and target VALUE_4 could not be started because the maximum number of allowed Global Mirror sessions on the logical subsystem has been reached. No action was taken on this pair.
Notes:
  • Four-site sessions are shown as two rows in the Overview panel, one for the Metro Global Mirror (MGM), and one for the multi-target Metro Mirror leg. Multi-target is also split into two rows. In the Details panel, this feature becomes more clear because each role has its own row.
  • Single site sessions like FlashCopy or Safeguarded Copy are not displayed in either the Overview or Details panel.