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Remedies for System Failure and Data Corruption
1.
Twee remedies tegen
systeemuitval en datacorruptie [RAC en Data Guard] SPREKER : Jos van den Oord E-MAIL : Jos.van.den.Oord@transfer-solutions.com DATUM : 14 oktober 2010 WWW.TRANSFER-SOLUTIONS.COM
2.
Inleiding: Twee remedies
tegen systeemuitval en datacorruptie Data Guard (DG) DG Structuur DG Proces Architectuur DG Concept Real Application Clusters (RAC) RAC Structuur RAC Proces Architectuur RAC Concept RAC en Data Guard Complementaire HA/DR overzicht © COPYRIGHT TRANSFER SOLUTIONS B.V. 2
3.
Data Guard
Users Central Console Management Network Primary Site Standby Site Database servers Data Guard Primary Database Physical or Logical Standby Database Switch Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 4
4.
Data Guard
Users Database Disks (san nas) Central Console Management Network Primary Site Standby Site Database servers Data Guard Primary Database Physical or Logical Standby Database Switch Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 5
5.
Data Guard
Users HBA’s Central Console Management Network Primary Site Standby Site Database servers Data Guard Primary Database Physical or Logical Standby Database Switch Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 6
6.
Data Guard
Users Nodes Central Console Management Network Primary Site Standby Site Database servers Data Guard Primary Database Physical or Logical Standby Database Switch Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 7
7.
Data Guard
Users Redo Log Apply Central Console Management Network Primary Site Standby Site Database servers Data Guard Primary Database Physical or Logical Standby Database Switch Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 8
8.
Data Guard
Users Monitor en Management Central Console Management Network Primary Site Standby Site Database servers Data Guard Primary Database Physical or Logical Standby Database Switch Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 9
9.
Data Guard
Users Load Balance TAF - Database role Central Console Management Network Primary Site Standby Site Database servers Data Guard Primary Database Physical or Logical Standby Database Switch Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 10
10.
Data Guard Proces
Architectuur (Active) Oracle Net Standby Transactions Database Redo Buffer SYNC MRP LNS RFS LSP SGA ASYNC LGWR Standby Primary Online Redo Redo Logs Database Logs Queries ping ARCH Reports ARCH RFS Testing Archive logs voor oplossen log file gap Backups Archived Redo Logs © COPYRIGHT TRANSFER SOLUTIONS B.V. 11
11.
Data Guard Concept
Redo transport – Protection mode Data Guard Redo Bij geen bevestiging van de Mode Risk of data loss Transport standby: Maximum Potential for Primaire DB wacht nooit op een Performance ASYNC bevestiging van de standby. Minimal Data Loss Zero Data Loss Primaire DB wacht op bevestiging Maximum Availability Single Failure SYNC van de standby DB of op een Protection gedefineerde netwerk timeout Zero Data Loss Maximum Primaire DB wacht op bevestiging Protection Double Failure SYNC van de standby DB. Protection © COPYRIGHT TRANSFER SOLUTIONS B.V. 12
12.
Data Guard Concept
Physical standby Logical Standby Active Data Guard (Read Farm) Data Guard Snapshot Standby Rolling Database Upgrades Switchover en Failover © COPYRIGHT TRANSFER SOLUTIONS B.V. 13
13.
Real Application Cluster
Users Central Console Management Network High Speed Switch Interconnect or Interconnect Cluster Database servers Shared cache Switch Storage area network Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 15
14.
Real Application Cluster
Users Shared disks (san, nas) Central Console Management Network High Speed Switch Interconnect of Interconnect Cluster Database servers Shared cache Switch Storage area network Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 16
15.
Real Application Cluster
Users HBA’s Central Console Management Network High Speed Switch Interconnect of Interconnect Cluster Database servers Shared cache Switch Storage area network Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 17
16.
Real Application Cluster
Users Nodes Central Console Management Network High Speed Switch Interconnect of Interconnect Cluster Database servers Shared cache Hub or Switch Storage area network Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 18
17.
Real Application Cluster
Users Shared Cache Central Console Management Network High Speed Switch Interconnect of Interconnect Cluster Database servers Shared cache Hub or Switch Storage area network Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 19
18.
Real Application Cluster
Users High Speed Switch Central Console Management Network High Speed Switch Interconnect of Interconnect Cluster Database servers Shared cache Hub or Switch Storage area network Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 20
19.
Real Application Cluster
Users Monitor en Management Central Console Management Network High Speed Switch Interconnect of Interconnect Cluster Database servers Shared cache Switch Storage area network Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 21
20.
Real Application Cluster
Users Load balance TAF Central Console Management Network High Speed Switch Interconnect of Interconnect Cluster Database servers Shared cache Hub or Switch Storage area network Mirrored Disks © COPYRIGHT TRANSFER SOLUTIONS B.V. 22
21.
RAC 11gR2 Proces
Architectuur Cluster VIP VIP’s Node 1 Node n SCAN listener SCAN listener Listener Listener Instance 1 Instance n ASM 1 ASM n Oracle Clusterware Oracle Clusterware interconnect Operating System Operating System Managed by ASM • Redo / Archive log All Instances • Database / control files • OCR / Voting disks • ACFS © COPYRIGHT TRANSFER SOLUTIONS B.V. 23
22.
RAC 11gR2 Concept
Schaalbaarheid Cluster Node 1 Node n SGA SGA Cache Fusion BGP BGP BGP BGP Managed by ASM • Redo / Archive log All Instances • Database / control files • OCR / Voting disks • ACFS © COPYRIGHT TRANSFER SOLUTIONS B.V. 24
23.
RAC 11g Concept
Schaalbaarheid Nodes Load balancing Database Consolidatie © COPYRIGHT TRANSFER SOLUTIONS B.V. 25
24.
RAC en Data
Guard Complementaire Oorzaak Resource Protection Component Nodes fout RAC Instance Software RAC fout Data Menselijke Data Guard fout Site Omgevings Data Guard fouten © COPYRIGHT TRANSFER SOLUTIONS B.V. 26
25.
HA/DR overzicht
Technologie HA/Standby Toepassing Installatie en Nodes DR Beheer Activiteit Complexiteit Data Guard • Site failover 1 1 3 Physical • Alleen lees acties en rapporten Standby • QA testing • Backups • Data corruptie Data Guard • Lees-schrijf acties voor rapporterende 2 2 2 Logical applicatie Standby • Replicatie naast een bestaande schema In een database. • Data corruptie Real • Load- Balancing Nodes 3 3 - Application • Schaalbaarheid Nodes Cluster • Node failover © COPYRIGHT TRANSFER SOLUTIONS B.V. 27
26.
Vragen
Antwoorden CONSULTING | MANAGED SERVICES | EDUCATION WWW.TRANSFER-SOLUTIONS.COM © COPYRIGHT TRANSFER SOLUTIONS B.V. 28