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Windows Disaster Recovery (DR) with Replication using Double-Take Availability

Windows Disaster Recovery (DR) with Replication using Double-Take Availability. Solution Overview. Protecting data is important, but cost and complexity prevent small companies & departments from doing it

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Windows Disaster Recovery (DR) with Replication using Double-Take Availability

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  1. Windows Disaster Recovery (DR)with Replication using Double-Take Availability

  2. Solution Overview • Protecting data is important, but cost and complexity prevent small companies & departments from doing it • Backup is very important, but it alone cannot provide for a rapid failover or recovery from a disaster • Replication provides superior RTOs & RPOs. • Host-based DR for Windows servers can be both easy and affordable, also applicable to virtual servers • Double-Take is recognized as the market leader in host based replication and recovery for 16+ years

  3. Disaster Recovery for SMBs When do SMBs start to consider DR and Replication? • When application recovery in the event of a disaster must happen quickly, <1hr vs. several hours • Does not replace backup, augments data protection • RTO & RPO – Time and Point objectives for recovery • Synchronous vs. Asynchronous – Depends on Latency • When should shared storage be considered as part of a DR project?

  4. Comparing approaches to Replication for DR • Smaller companies (SMBs) or departments within larger companies have historically been road-blocked from these features & capabilities

  5. Basic Architecture – What You Will Need • At least two servers for failover, one server for management • Two or more SAN storage devices (Fibre Channel* or iSCSI) • Shared Network (* = plus FC fabric and FCIP extension if FC storage) • Replication capabilities on servers or storage

  6. Requirements For SMB Replication • Top 5 criteria in addition to being SAN storage • Cost Effective • Protected & Reliable • Easy Upgrades and Management • Reasonable Performance • NOT burdened with additional features that applications, operating systems, and server virtualization provides • iSCSI + Host-Based Replication is a good technology match for these criteria

  7. Leveraging Replication Features for DR • What are the concerns • Bandwidth & Latency of WAN • Hardware-dependent failover • Addressing Those Concerns • Real-time replication that is optimized for WAN • Replicates with compression & bandwidth limiting optimization • Across Hardware and Virtualization • Failover across subnets, support for dissimilar hardware and storage, between physical or virtual systems in either direction • Value of Host-based with Double-Take Availability • 3 Levels of Compression, byte level differences only, real-time or scheduled/throttled, full-server or data-only

  8. How Host-Based Real-Time Replication Works

  9. Putting It Together – DR with 16TB of SAN

  10. Top Questions & Key Takeaways • Top Questions • For small environment (5 VMs & <100 users), how much Bandwidth? • What is a practical distance for small environment DR (Latency)? • Solution Key Takeaways • Protecting data is important, but cost and complexity prevent small companies and departments from doing it for most data. • Backup alone cannot provide for a rapid failover or recovery from a disaster; replication provides superior RTOs & RPOs. • DR for Windows servers (incl VMs) can be done both easily & affordably with DroboElite and Double-Take Availability.

  11. Questions?Feedback & comments also welcome @tv@drobo.com, or on Twitter @ DroboMore DroboElite solutions @ http://www.drobo.tv

  12. Example – Full Server Protection & Failover • Hardware and Application independent • Physical or Virtual • Target requires only a base Operating System

  13. Example – Data Protection and Failover • Only replicates application data • Less data across the wire • Faster failover possible

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