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Dell PowerScale SyncIQ: Architecture, Configuration, and Considerations
Executive summary Introduction to SyncIQ Deployment topologies Use cases Architecture and processes Data replication
Introduction to data replication
Initial replication
Incremental replication
Differential replication or target aware sync
Configuring a SyncIQ policy Impacts of modifying SyncIQ policies SyncIQ performance rules SnapshotIQ and SyncIQ 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

Incremental replication

Home > Storage > PowerScale (Isilon) > Product Documentation > Data Protection > Dell PowerScale SyncIQ: Architecture, Configuration, and Considerations > Incremental replication

Incremental replication

  • An Incremental Replication of a SyncIQ policy only transfers the portions of files that have changed since the last run. Therefore, the amount of data replicated, and bandwidth consumption is significantly reduced in comparison to the initial replication.

    Similar to the Initial Replication, at the start of an Incremental Replication, the scheduler processes create the job directory. Next, the coordinator starts a process of collecting changes to the dataset, by taking a new snapshot and comparing it to the previous snapshot. The changes are compiled into an incremental file with a list of LINs that have been modified, added, or deleted.

    After all the new modifications to the dataset are logged, workers read through the file and start to apply the changes to the target cluster. On the target cluster, the deleted LINs are removed first, followed by updating directories that have changed. Finally, the data and metadata are updated on the target cluster.

    As all updates complete, the coordinator creates the job report, and the replication is complete.