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Version: 2.9.0

Failover Types

What is DFS Failover?​

Introduction​

DFS Failover is the process of automatically switching data access to a backup location during a disaster. Superna Eyeglass for PowerScale OneFS supports this by simplifying the configuration and management of DFS failover.

How DFS Failover Works​

The Eyeglass DFS solution simplifies disaster recovery (DR) for PowerScale OneFS by maintaining DFS targets (UNC paths) that point to both the source and destination clusters.

Failover and failback operations are initiated directly from Eyeglass, automatically moving configuration data to the writable copy of the UNC target. By grouping shares based on SyncIQ policies, Eyeglass ensures that any newly added shares on PowerScale OneFS are automatically protected. Quotas are also detected and protected without manual intervention.

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For optimal availability, Domain-based DFS namespaces are recommended over server-based DFS roots. Domain-based DFS provides a more reliable and resilient solution for clients.

What are the results of DFS Failover​

  1. Automatic Switching of Data Access: The UNC target path automatically switches to the writable copy, ensuring continuous access to data without manual intervention.

  2. Protected Configuration Data: The configuration data for DFS targets is moved to the destination cluster, ensuring that all DFS target paths are updated to point to the correct, accessible location.

  3. Protection of Newly Added Shares: Any shares added to PowerScale OneFS after the initial SyncIQ configuration are automatically included in the failover process, ensuring that no new data is left unprotected.

  4. Quota Management: Quotas applied to the shares are also automatically detected and protected, meaning that the quota settings are maintained during and after the failover.

  5. Simplified Disaster Recovery: Overall, the policy failover process is streamlined, with Eyeglass handling the complexity of failover, making disaster recovery operations more efficient and less error-prone.