Upgrading Asynchronous Replication

For configurations where one source server replicates all of the virtual disks (vDisks), use the upgrade procedure provided in this section.

The automated installation wizard should not be used when upgrading the destination server of a replication configuration. The destination server must be upgraded manually first. The installation tool may then be used to upgrade the source side.

For bi-directional replication relationships, either server group may be upgraded first, but all servers must be manually upgraded. Replication transfer will be stopped in one direction until the update is complete on all groups. (See Manually Upgrading DataCore Servers for instructions). The upgraded server group may show as 'Unavailable' until all groups are upgraded.

All replications must be initialized and healthy at the time of upgrade. If it's necessary to perform the upgrade before all replications have been initialized, DataCore recommends force-splitting the replications and re-creating them after the upgrade is complete. Checksum initializations will take care to avoid unnecessary data transfer.

To upgrade a configuration where one source server replicates all vDisks:

  1. Upgrade the destination server.

  2. When the server is back up and running, wait for the file transfer to resume. Then upgrade the server in the source group that replicates the vDisks to the destination.

  3. After the server is back up and running, wait for the mirror recoveries to complete. Then upgrade the other server in the group.

  4. In the case of more than two servers, continue with server upgrades (step 3) until all servers are running DataCore SANsymphony 10.0 PSP19.

All servers in all groups involved in asynchronous replication should be on DataCore SANsymphony 10.0 PSP19 to operate properly.