Changing replication options

You can enable or disable replication for a namespace on the namespace Replication panel. While replication is enabled for the namespace, you can change options that relate to replication. While replication is disabled for the namespace, these options are hidden.

The replication options you can change are:

• Read from remote system.

  By default, when you create a namespace, this option is enabled.

  Important: Do not disable the read-from-remote-system option unless you have a specific reason to do so.
• Accept REST, S3 compatible requests redirected from other HCP systems.

  By default, when you create a namespace, this option is enabled.

  You may want to disable this option if your applications cannot tolerate stale data or metadata. One way to get stale data would be to request an object for which two versions exist but for which the current version hasn’t been replicated yet. In this case, the system targeted by the request would retrieve the old version from another system in the replication topology and return that version to the application.

• Collision handling.

  By default, when you create a namespace, this option is set to move objects.

• Allow erasure coding.

  If allowed by the tenant configuration and if you make the namespace cloud optimized, when you create a namespace, you can choose whether the namespace allows erasure coding.

  Allowing erasure coding for a namespace that has shredding enabled as the default for new objects can significantly increase the load on all systems in the replication topology.

  You can also enable or disable replication for namespaces and, if allowed, manage erasure coding on the Replication page.

  While the tenant is being replicated, if you disable replication for a namespace that has already been replicated and then delete the namespace on one or more systems, the namespace deletions are not replicated. If you then reenable replication for that namespace and the namespace still exists on one or more systems, the namespace is replicated back to the systems where you deleted it.

  Important: Disabling replication or the read-from-remote-system option for a namespace that has already been replicated may cause object data in that namespace to become inaccessible on one or more systems in the replication topology.