Setting the remote replication options

TrueCopy® User Guide
Version
9.8.7
Audience
anonymous
Part Number
MK-98RD9022-18

You can set storage system and CU options for Maximum initial copy activities, Blocked path monitoring, and Blocked path SIM monitoring.

Note: If iSCSI is used in a remote path, the blocked path monitoring remote replica option must be set to at least 40 seconds (default). If blocked path monitoring is less than 40 seconds, the path might be blocked due to a delay in the network such as many switches in a spanning tree protocol (STP) network or a long distance connection.

You must have the role of Storage Administrator (Remote Copy).

  1. Open the Replication window.
    1. Click Storage Systems, and then expand the Storage Systems tree.
    2. In the Storage Systems tree, click Replication.
  2. In the Replication window, click Edit Options > Remote Replication.
  3. In the Edit Remote Replica Options window, for Copy Type, select TC or TC/TCMF.


  4. Change Storage System Options as needed. Settings apply to the storage system.
    1. For Maximum Initial Copy Activities, specify the number of volumes to be copied concurrently per initial copy operation.
      The range is from 1 to 512 volumes. The default is 64. The default setting might not limit the impact on performance, depending on your number of data paths, pairs, and so on. You should consider these factors when making a selection. When you change the maximum initial copy activities setting, the new setting applies to pairs created or resynchronized after the setting was changed, not to existing pairs.

      If the value is too large, the number of pending processing in a remote storage system increases, and the response time of a remote I/O for the update I/O might be affected. For example, if you set 64 for Maximum Initial Copy Activities, and register 65 TrueCopy pairs, the local storage system starts creating the 64 pairs first. It does not start creating the 65th pair before one of the pairs is synchronized.

    2. For Blocked Path Monitoring, enter the number of seconds for the system to monitor blocked paths. The range is 2-45 seconds, and the default is 40.
      If all paths become monitored because of path error, an MIH may occur in the host. Therefore, the time you specify must be less than the host's MIH timer setting.
    3. For Blocked Path SIM Monitoring, enter the number of seconds for the system to monitor SIMs reported for blocked paths. The range is from 2 to 100 seconds.
    4. For Services SIM of Remote Copy, specify whether or not services SIMs in the remote CU are reported to the host.
  5. Change CU Options as needed. Settings apply to the selected CU only.
    1. Select the CU with the options to be changed, and then click Change CU Options. If you do not want to change CU options, click Finish.
    2. In the Change CU Options dialog box, for Maximum Initial Copy Activities, specify the number of volumes to be copied concurrently per initial copy operation for the CU. The range is from 1 to 16 volumes.
      This option is available only when Maximum Initial Copy Activities is Enable.
    3. For Services SIM of Remote Copy, specify whether or not services SIMs in the remote CU are reported to the host.
    4. Click OK.
  6. In the Edit Remote Replica Options window, click Finish.
  7. In the Confirm window, review the settings and enter a task name in the Task Name box.
  8. Click Apply to save your settings.