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VERITAS Replication Technologies for Disaster Recovery

VERITAS Replication Technologies for Disaster Recovery. Speaker Name VERITAS Software. Wks. Days. Hrs. Mins. Secs. Secs. Mins. Hrs. Days. Wks. Recovery Point. Recovery Time. Disaster Recovery Concepts. Recovery Point Objective (RPO) The point to which data must be restored

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VERITAS Replication Technologies for Disaster Recovery

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  1. VERITAS Replication Technologies for Disaster Recovery Speaker Name VERITAS Software

  2. Wks Days Hrs Mins Secs Secs Mins Hrs Days Wks Recovery Point Recovery Time Disaster Recovery Concepts • Recovery Point Objective (RPO) • The point to which data must be restored • Amount of data loss acceptable • Recovery Time Objective (RTO) • The time by which data must be restored • Amount of time it takes to come back online

  3. Wks Days Hrs Mins Secs Secs Mins Hrs Days Wks Recovery Point Recovery Time Technologies for RPO and RTO • How much data loss can you endure? • How much downtime can you endure? Replication Geographic Clustering Tape Backup & Vault Replication Only Tape Restore

  4. HA solutions eliminate data loss and downtime VERITAS can extend HA solutions to address DR Remote Data Replica VERITAS Volume Manager VERITAS Volume Replicator VERTAS FlashSnap Wks Days Hrs Mins Secs Secs Mins Hrs Days Wks Recovery Point Recovery Time HA Zone High Availability Solutions for Disaster Recovery • Application Availability • VERITAS Cluster Server • Global Cluster Option

  5. Replication Technologies

  6. VERITAS Volume ManagerWhat is volume management? DEFINITION: Volume management makes the makes the physical into logic devices that look and act like a physical disk. WHY IT’S IMPORTANT: Volume management protects an organizations data against component outages by making multiple copies of data available. Application Volume Manager

  7. Secondary Site SAN Fabric VERITAS Volume ManagerSynchronous Mirroring over Fibre Channel Primary Site DEFINITION: Remote Mirroring is a means of mirroring data synchronously over a SAN, or fibre connection, across a limited distance. WHY IT’S IMPORTANT: Remote mirroring provides data protection from hardware and site failure over a metropolitan area network (MAN). Application Volume Manager

  8. Choose Volume Manager:Mirroring over Fibre Channel Mirroring within a MAN Mirroring less then 100km Mirroring synchronously Choose Volume Replicator:Replicating over IP Network No extended SAN Infrastructure Replicating over WAN The most robust and flexible technology for replicating greater than 100km Replicating synchronously or asynchronously Technology Alternatives Volume Manager Volume Replicator 1 m 10 m 1 km 10 km 100 km 1000 km 10,000 km

  9. Application Application RLink RLink Volume Manager Volume Manager Volume Manager Volume Replicator IP Network Volume Replicator SRL SRL RVG VERITAS Volume Replicator Replication over IP Networks • Replication Links (Rlinks): • Support up to 32 • Configure each for synchronous or asynchronous replication • Storage Replicator Log (SRL) • Tracks writes in specific order to guarantee write-order fidelity • Replicated Volume Group (RVG) • Pick which data to replicate • No Distance Limitations • Initialization Options • Tape-based, Over-the-Wire, Mirroring • Host Impact = Volume Manager + 2% • No application performance impact in asynch

  10. Application Application RLink RLink Volume Manager Volume Manager Volume Manager Volume Replicator IP Network Volume Replicator SRL SRL RVG Volume Replicator: Synchronous Mode • Exact mirror copy at secondary location • Application Performance impact is equal to network latency 64kb com ack com 64kb

  11. Application Application RLink RLink Volume Manager Volume Manager Volume Manager Volume Replicator IP Network Volume Replicator } X Data Loss SRL SRL X Oldest RVG Newest Volume Replicator: Asynchronous Mode • No application performance impact • Minimal Data Loss typically milliseconds • Protect against network outages • Utilize Primary and Secondary Sites • Fail over and fail back easily between sites 56kb 56kb 80kb com com ack 64kb com

  12. Snapshot 10:00AM Space-Optimized Snapshot Now Instant Access to Replicated DataVERITAS FlashSnap Primary Site Secondary Site Useful in conjunction with remote mirroring & replication: • Immediate access to data • Test disaster recovery plans • Use less storage Now

  13. Manage VVR from VEA GUI

  14. How Much Bandwidth do I need?VRAdvisor

  15. Bandwidth Analysis:VRAdvisor

  16. Hardware Replication Secondary Primary STRENGTH • Operating System support WEAKNESSES • Eliminates choice among storage platforms • Lock in • Higher cost per MB/GB/TB • Limited Distance Support • Need specialized network gear to replicate over IP • Synchronous mode • Field testing has shown Volume Manager outperforms hardware replication • Asynchronous mode • Data integrity concerns • “Asynchronous” replication generally means periodic • Periodic • Old data • Requires much more storage (5X – 7X is not uncommon)

  17. Sync Local Staging Mounted at Remote Target Old Data Now Very Old Data Async/Periodic with Hardware • Snapshots to preserve data integrity • Requires additional storage (lots) • Delivers less-current data (RPO) Production Server Verified for consistency Disk Track Copy

  18. Database Replication Strength • Acceptable for off-host processing Weaknesses • Not comprehensive • Management and maintenance complexity • Asynchronous or Periodic only • Secondary database will be different than primary Database-level replication not ideally suited for DR

  19. VERITAS Volume ManagerVERITAS Volume Replicator • Cost Savings • Supports ANY storage (EMC, HDS, Sun, LSI, IBM, …) • Supports Fibre Channel and IP Natively • No specialized network gear required • Protection • Certified with Oracle in Synchronous and Asynchronous mode • No windows of data corruption • Full database support (all modes) • Manageability • Online management • Use Volume Manager knowledge base for disaster recovery

  20. Flexible Disaster Recovery Architectures Local Clustering (LAN) Metropolitan Disaster Recovery (MAN) Wide Area Disaster Recovery (WAN) Metro DR with Remote Mirroring Metro DR with Replication Orange County, CA Phoenix, AZ License Key Enabled Storage Foundation + Volume Replicator Option + Global Cluster Option Cluster Server License Key Enabled

  21. VERITAS Cluster Server™with Global Cluster Option PRODUCT OF THE YEAR High Availability Source: Network Magazine 2002 • Automation • Application level failover • Workload management • “One click” wide area failover • Open Solution • Most extensive hardware, storageand application support • Multi-O/S support: works the sameacross the enterprise • Robust Technology • Market leader • Highly scalable • Flexible failover policies MARKET LEADERClustering / HA Software Source: IDC 2002

  22. For customer examples visit:The Customer Implementation Slide Set

  23. Thank You

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