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Dell PowerScale SyncIQ: Architecture, Configuration, and Considerations
Executive summary Introduction Deployment topologies Use cases Architecture and processes Data replication Configuring a SyncIQ policy Impacts of modifying SyncIQ policies SyncIQ performance rules SnapshotIQ and SyncIQ
Introduction
Specifying snapshots for replication
Archiving SnapshotIQ snapshots to a backup cluster
Target cluster SnapshotIQ snapshots
Writeable snapshots
SyncIQ design considerations Failover and failback Superna Eyeglass DR Edition SyncIQ and CloudPools SyncIQ security SyncIQ bandwidth reservations Monitoring, alerting, reporting, and optimizing performance Administration SyncIQ replication and data reduction 16 TiB large file support and SyncIQ implications OneFS version compatibility SmartLock compatibility Conclusion Appendix A: Failover and failback steps Appendix B: SyncIQ encryption with self-signed certificates Appendix C: Configuring cascaded replication Appendix D: Configuring custom replication Appendix E: Technical support and resources

Introduction

Introduction

  • OneFS provides an option to replicate a specific point-in-time dataset with SyncIQ. By default, SyncIQ creates a snapshot automatically at the start of a job. An example use case for this is when a specific dataset is required to replicate to multiple target clusters. A separate policy must be configured for each target cluster, resulting in each policy taking a separate snapshot and the snapshot could be composed of a different dataset. Unless the policies start at the same time and depending on how quickly the source is modified, each target cluster could have a different dataset. Therefore, complicating administrator management of multiple clusters and policies, as each cluster has a different dataset.

    As stated in Whenever a snapshot of the source directory is taken, SyncIQ policies provide an option for triggering a replication policy when a snapshot of the source directory is completed. Additionally, at the onset of a new policy configuration, when the “Whenever a Snapshot of the Source Directory is Taken” option is selected, a checkbox appears to sync any existing snapshots in the source directory.

    Depending on the IT administrative workflows, triggering replication automatically after a snapshot may simplify tasks. However, if snapshots are scheduled to run on a schedule, this could trigger SyncIQ to run at a higher frequency than required consuming cluster resources. Limiting automatic replication based on a snapshot may be a better option.

    SyncIQ offers many options to utilize snapshots. After reviewing this section, also reference Target snapshots and Snapshots and SyncIQ policies.