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Dell PowerStore: Replication Technologies
Executive summary Introduction Remote system configuration
Introduction
Overview and prerequisites
Remote systems configuration
Native replication for block and file Asynchronous replication for vVol based VMs Metro Volume System limits Integration with PowerStore Conclusion Not Appendix A: Replication support across platforms References

Introduction

Home > Storage > PowerStore > Data Protection > Dell PowerStore: Replication Technologies > Introduction

Introduction

  • This section describes the remote system configuration that is required for all native replication technologies supported by PowerStoreOS. A remote system configuration specifies the replication relationship between two configured PowerStore Clusters or between a PowerStore cluster and a Dell PowerProtect DD, and contains information about related network information for management and data connection. After a remote system pair is set up, the remote system configuration can be used on both participating PowerStore clusters for replication in any direction for available capabilities. The allowed capabilities for a remote system pair configuration depend on the expected and configured network latency configuration for the replication data network.

    All synchronous replication types require a low latency replication data network with 5ms round trip latency or less. The replication network latency has a direct impact on the expected host IO performance because each IO is acknowledged to the host only after the IO is committed for both the replication source and the destination.

    Latency independent replication types:

    • Block asynchronous
    • vVol asynchronous
    • File asynchronous

    Only when latency is set to less than 5ms and latency dependent replication types:

    • Block Metro synchronous
    • Block synchronous
    • File synchronous

    When a remote system pair is configured with 5ms and used for synchronous replication or metro, it is not supported to change the latency configuration to a higher value.

    The replication with PowerStoreOS supports up to eight remote system pairs.