HCP System Management Help


Considerations for modifying replication link settings

These considerations apply to modifying the settings for replication links:

You can modify the settings for a replication link in the HCP System Management Console for either system involved in the link.

You can modify the settings for a replication link at any time.

You can change an active/passive link to an active/active link, but you cannot change an active/active link to an active/passive link.

When changing an active/passive link to active/active, you need to ensure that replication checkpoints are up to date before converting, otherwise you risk losing directory metadata.

After an upgrade of an HCP system from release 6.x to release 7.0, you can change preexisting active/passive links to active/active links. However, if such a link includes one or more default-namespace directories and metadata changes were made to those directories before the upgrade, those metadata changes may be lost. To prevent this loss, wait until replication is up to date as of the time of the upgrade before you change the link type.

You cannot change the direction of an active/passive link.

If you change the domain name or IP addresses for either system involved in a link, the new domain name or IP addresses must identify the same system. The exception to this is when you’re reconfiguring the link before restoring it to a new or rebuilt system.

When you change an active/passive link to an active/active link, HCP suspends activity on the link. You need to resume activity on the link manually. For information on resuming activity on link, see Suspending and resuming activity on an individual link.

While updating link properties other than the link type, HCP temporarily suspends activity on the link.

With a cross-release link, you can enable automatic failover and failback. However, enabling automatic failover has no effect, and automatic failback works only when the release 7.0 system is the replica. Enabling automatic failback when the release 7.0 system is the primary system has no effect.

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