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Oracle Data Guard

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Martin Meyer
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Oracle Data Guard
Causes of Data Loss Source: Disaster Recovery Journal Hardware & system errors Natural disasters 3% Software corruption 4% Computer viruses 7% Human errors 36% 49%
Real Application Clusters Continuous Availability for all Applications Data Guard Guaranteed Zero Data Loss Flashback Guaranteed Zero Data Loss Dynamic Reconfiguration Capacity on Demand without Interruption Online Redefinition Adapt to Change Online ASM Mirroring Storage Failure Protection Human Error Site Failures Storage/Net Failures Unplanned Downtime System Failures System Maintenance Planned Downtime Database Maintenance
What is a Standby Database ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Why Data Guard? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Traditional Physical Standby Databases Investment in Disaster Recovery
Active Data Guard 11 g Investment in Improved Quality of Service
Requirements ,[object Object],[object Object],[object Object]
Bandwidth Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Physical Standby ,[object Object],[object Object],[object Object],[object Object],[object Object]
Database Protection Modes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Maximum Availability Mode ,[object Object],[object Object],[object Object],[object Object],[object Object],ALTER DATABASE SET STANDBY TO MAXIMIZE AVAILABILITY ; Protection Mode Failure Protection Redo Shipping Protects Against Primary Failure LGWR using SYNC Maximum Availability Zero Data Loss
Architecture LGWR Primary database transactions Online redo logs ARC0 FAL RFS MRP or LSP Archived redo logs ARC0 Standby database Reports (MRP only) Standby redo logs Archived redo logs Backup Oracle net
Standby Redo Logs Redo from primary database RFS ARC0 Standby redo logs Archived redo logs MRP/LSP Standby database
Real Time Apply ,[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Real-Time Apply Architecture Physical Logical Standby Database MRP/ LSP RFS Standby Redo Logs ARCH Archived Redo Logs Archived Redo Logs Primary Database Transactions LGWR Online Redo Logs ARCH Oracle Net Real Time Apply
Real Time Apply Benefits ,[object Object],[object Object],[object Object],[object Object],[object Object]
Real Time Apply -Tuning Media Recovery ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Dictionary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Determining Query Latency ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Automatic Resynchronization ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Guard Role Transitions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Guard Broker ,[object Object],[object Object],[object Object],[object Object]
Fast-Start failover ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fast-Start Failover ,[object Object],[object Object]
Fast-Start Failover ,[object Object]
Fast-Start Failover ,[object Object],[object Object],[object Object]
Fast-Start Failover ,[object Object]
Fast-Start Failover ,[object Object],[object Object],[object Object]
Events that trigger Fast-Start Failover ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fast-Start Failover Conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fast-Start Failover Conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fast-Start failover ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Demo: Switchover ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Demo: Configure Fast_Start Failover ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Demo: Configure Fast_Start Failover ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Demo: Configure Fast_Start Failover ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Demo: Configure Observer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Demo: Switchover ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Verify on both ,[object Object],[object Object],[object Object],[object Object],[object Object]
Client Failover Best Practices ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Client Failover Best Practices ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Client Failover Best Practices ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Active Data Guard 11 g Investment in Improved Quality of Service
Active Data Guard ,[object Object],[object Object],[object Object],[object Object]
Data Guard Broker & Enterprise Manager ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Supported Operations for Read Only ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
THANK YOU ,[object Object],[object Object]

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Oracle Data Guard

  • 2. Causes of Data Loss Source: Disaster Recovery Journal Hardware & system errors Natural disasters 3% Software corruption 4% Computer viruses 7% Human errors 36% 49%
  • 3. Real Application Clusters Continuous Availability for all Applications Data Guard Guaranteed Zero Data Loss Flashback Guaranteed Zero Data Loss Dynamic Reconfiguration Capacity on Demand without Interruption Online Redefinition Adapt to Change Online ASM Mirroring Storage Failure Protection Human Error Site Failures Storage/Net Failures Unplanned Downtime System Failures System Maintenance Planned Downtime Database Maintenance
  • 4.
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  • 6. Traditional Physical Standby Databases Investment in Disaster Recovery
  • 7. Active Data Guard 11 g Investment in Improved Quality of Service
  • 8.
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  • 13. Architecture LGWR Primary database transactions Online redo logs ARC0 FAL RFS MRP or LSP Archived redo logs ARC0 Standby database Reports (MRP only) Standby redo logs Archived redo logs Backup Oracle net
  • 14. Standby Redo Logs Redo from primary database RFS ARC0 Standby redo logs Archived redo logs MRP/LSP Standby database
  • 15.
  • 16.
  • 17. Real-Time Apply Architecture Physical Logical Standby Database MRP/ LSP RFS Standby Redo Logs ARCH Archived Redo Logs Archived Redo Logs Primary Database Transactions LGWR Online Redo Logs ARCH Oracle Net Real Time Apply
  • 18.
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  • 41.
  • 42.
  • 43.
  • 44.
  • 45. Active Data Guard 11 g Investment in Improved Quality of Service
  • 46.
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  • 48.
  • 49.