Replicating nodes in a multiple-server environment

If the primary IBM Spectrum Protect server for the space management client is unavailable, you can manually configure the client to connect to a secondary server. You can recall files from the secondary IBM Spectrum Protect server but cannot migrate files to the secondary server. When node replication is used on the IBM Spectrum Protect secondary server, it is not permitted to restore stub files or call the dsmmigundelete command, see APAR IC94316 for details.

Before you begin

The primary IBM Spectrum Protect server for the space management client must be one that replicates client node data.

In a multiple-server environment, each IBM Spectrum Protect server includes storage pools for backup and migration. All pools used for backup and migration must be replicated to the same secondary server.

About this task

The IBM Spectrum Protect server that the client connects to during normal production processes is called the primary server. When the primary server is set up for node replication, the data for client nodes can be replicated to the secondary server.

The backup-archive client can automatically fail over to the secondary server when it is configured for failover.

However, the space management client does not automatically fail over to the secondary server. You must manually edit the dsm.sys file to connect to the secondary server. Any secondary server information in the replservername stanza and myreplicationserver option is ignored by the space management client.

Procedure

  1. Stop the backup and HSM processes on the IBM Spectrum® Scale cluster.
  2. Edit the dsm.sys options file.
    1. Change the value of the servername option from the primary server to the secondary server.
    2. Do not change the name of the server stanza.
  3. Start the HSM processes on the IBM Spectrum Scale cluster.

Results

Functions that require write access to the secondary IBM Spectrum Protect server are not available for a space-managed file system. You cannot back up, archive, or migrate files to the secondary server from a space-managed file system. You can restore, retrieve, and recall from the secondary server.

With the backup-archive client, you cannot restore migrated files as stub files. Migrated files can only be restored as resident files.

What to do next

To switch back to the primary IBM Spectrum Protect server, repeat the steps, but change the value of the servername option from the target server to the source server.