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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 SyncIQ design considerations
Introduction
Considering cluster resources with data replication
Snapshots and SyncIQ policies
Network considerations
Jobs targeting a single directory tree
Authentication integration
SyncIQ and Hadoop Transparent Data Encryption
Small File Storage Efficiency (SFSE) and SyncIQ
Hard links and SyncIQ
Dell Container Storage Interface (CSI) and SyncIQ
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

Snapshots and SyncIQ policies

Snapshots and SyncIQ policies

  • As snapshots and SyncIQ policies are configured, it is important to consider the scheduled time. As a best practice, it is recommended to stagger the scheduled times for snapshots and SyncIQ policies. Staggering snapshots and SyncIQ policies at different times ensures that the dataset is not interacting with snapshots while SyncIQ jobs are running, or conversely. Additionally, if snapshots and SyncIQ policies have exclusive scheduled times, this ensures that the maximum system resources are available, minimizing overall run times. However, system resources are also dependent on any Performance Rules configured, as stated in SyncIQ performance rules.

    Another factor to consider is the impact on system resources if SyncIQ policies are triggered based on snapshots, as discussed in Whenever a snapshot of the source directory is taken. For example, if a snapshot policy is configured to run every 5 minutes, the policy is triggered when the snapshot completes. Depending on the dataset and the rate of updates, SyncIQ could be far behind the newest snapshot. Additionally, a constant trigger of data replication impacts cluster resources. Consider how the snapshot frequency impacts overall system performance. Alternatively, rather than using snapshot triggered replication, consider manually running a SyncIQ policy with a specified snapshot, as explained in Specifying snapshots for replication.

    For more information about snapshots and SyncIQ, see Target snapshots and SnapshotIQ and SyncIQ.