Disaster Recovery Beyond Backup

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Disaster Recovery Beyond Backup

• Jason Phippen Director Product and Solutions
  Marketing, EMEA

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Agenda

• Disaster Recovery Concepts
• Backup Last Line of Defence
• Enhancing Backup with Replication
• Remote Site Replication and Mirroring
• Clustering for Disaster Recovery
• Questions

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Disaster Recovery Concepts

• Recovery Point Objective (RPO)
• Point in time to which applications data must be
  recovered to resume business transactions
• Recovery Time Objective (RTO)
• Maximum elapsed time allowed before lack of
  business function severely impacts an
  organization

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Recovery Point Objective (RPO)
Replication
Tape Backup w/ Offsite Vaulting

• How much data loss can you endure?

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Recovery Time Objective (RTO)
Geographic Clustering
Recovery from Tape

• How much downtime can you endure?

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Choosing a Recovery Site

• Far Enough away
• How far away from the main site?
• What resources should it have?
• Site Strategies (Hot, Warm, Cold)
• Considerations
• Fault zones
• Flood plains
• Power grids
• Climate zones
• Locality relative to other sites (e.g., airport)
• Remote customers and employees

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Backup Your last line of Defense

• Redundant systems replicate user errors, viruses
  and data corruption
• System or component redundancy (RAID, mirroring)
  cannot replace backup
• Backup tapes may represent the last valid copy of
  data
• Backups are your last line of defense against
  total data loss

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Enhancing Backup with Replication
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Replication-enhanced Backup

• Replicating the Backup Catalog server
• Shave hours off a tape restore strategy
• No need to re-catalog tapes
• No need to rebuild the backup/restore server
• Tape restores can begin immediately

Site A
Site B
Replicate Backup Catalogs
Backup Master/Media Server
Backup Tape Copies Sent to Offsite
Backup Clients
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Remote Site Replication and Mirroring
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Replication and Mirroring
Asynchronous
Synchronous

• Key Requirements
• Must be far enough away
• No windows of data corruption at secondary

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Synchronous Replication
Primary Site
Secondary Site

• Strengths
• Maximum data currency (RPO)
• Data available immediately at secondary (RTO)
• Weaknesses
• Potential to impact application performance
• Data writes lag by network latency
• Write commit latency across nodes

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Asynchronous Replication
Primary Site
Secondary Site

• Strengths
• Maximum performance
• May have less application impact
• Data available immediately at secondary (RTO)
• Weaknesses
• Secondary may lag primary (RPO)
• Potential for data corruption (not a weakness
  for VERITAS)

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Logical Volume ManagementRemote Mirroring
Primary Site

• Lower hardware costs
• Groups physical disks into logical volumes
• Hardware Independence,
• Greater IT productivity
• Simplified administration of heterogeneous
  environments
• Proactive management of applications
• Increased application ROI

Application
Volume Manager

• Can mirror over SAN distances

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Clustering for Disaster Recovery
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Clustering for Disaster Recovery
Campus / MAN Disaster Recovery
WAN Disaster Recovery
MAN
OR
Clustering , Replication
Clustering, Remote Mirroring
Clustering, Replication, Global Clustering
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Campus / MAN Disaster Recovery St-r-e-t-c-h
Cluster Over A SAN
Distance may vary depending upon infrastructure
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Global Clustering

• Geographically dispersed sites linked by public
  carrier wide area network
• Each site aware of the configuration and state of
  all of the sites
• Direct site level migration in event of
  catastrophe
• Global Availability Management
• Single point of monitoring and administration

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Wide Area Availability
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VERITAS Uniquely Qualified (HA and DR)
Local
Multi-site
Availability Requirements
VERITAS Cluster Server
VERITAS Global Cluster Manager
Volume Manager/ Foundation Suite
VERITAS Volume Replicator
NetBackup/ Backup Exec
- NetBackup Vault - BMR / IDR
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Questions