Oracle Real Application Clusters One Node and Rac One Node Price

Virtualization Value Propositions

• Ubiquitous interest in virtualization :
  • Directly reduce costs by consolidating servers
    • Reduce server costs, maintenance, floor space, power, cooling
• Increase flexibility by enabling reshuffling of work on servers (live migration)
• Claims to provide universal HA
• Claims to reduce maintenance outages

RAC One Node Better Virtualization for Databases

• A virtualized single instance database
• Delivers value of server virtualization to databases on physical servers
  • Live migration of instances across servers
  • Rolling patches for single instance databases
  • Built-in cluster failover for high availability
  • Online upgrade to RAC
  • Standardized deployment across all Oracle databases

Isolation via Instance Caging

• Instance caging enables administrators to limit cpu cores by instance
• Protects service levels by preventing runaway cpu consumption
• Can be adjusted dynamically, while databases are online.
  • Controlled by cpu_count parameter
  • Supports partitioning and overprovisioning cpu
• Works with Resource Manager

Omotion

• Omotion moves a RAC One Node instance from one server to another—without any downtime
• Use Cases
  • Load balancing
  • Database + OS patching and maintenance
• Oracle supplied tools control migration
  • Services are not accepting connections on both nodes at the same time
  • Migrated instance shutdown transactional once services moved
  • A maximum of 30 minutes allowed for connections to migrate (then shutdown abort)

Rolling Online Patching

• Rolling upgradeable RAC patches are also rolling upgradeable with RAC One Node
• Omotion migration followed by patching
• When patching complete, the primary instance is brought back online and the secondary instance is shutdown (reverse Omotion)

RAC One Node Pricing

• Oracle RAC One Node is a separately priced option to Oracle Database 11g Release 2 Enterprise Edition
  • $10,000 per processor
  • Eligible for list-to-list upgrade credit when upgrading to full RAC
• All nodes (except ONE spare node) on which RAC One is installed must be licensed for RAC One Node
  • One node may be specified to be a spare node for cold failover/Omotion and need not be licensed under the 10-day use rule
  • Pricing policy mirrors 3rd-party cold failover policy

When To Use What?

• Oracle RAC
  • Business critical applications—almost zero downtime
  • Performance intensive applications requiring horizontal scalability
  • Database consolidation
• Oracle RAC One Node
  • Better-than-3rd-party-clustering HA (Symantec/Veritas, IBM, HP)
  • Failover + Omotion
  • Fits within a single server
  • Online scale-out to multi-node RAC
  • OS and Cluster consolidation
• Oracle Enterprise Edition
  • Minimal HA requirements—tolerate unplanned and planned outages
  • Fits within a single server
  • Minimal growth expected
  • Dedicated hardware

Management Tools

• Command Line tools
  • raconeinit—Identifies to the cluster that this is a RAC One Node database and specifies servers for failover
  • raconestatus—displays status of RAC One Node databases running in the cluster
  • raconefix—fixes metadata after a failure or failover
  • Omotion—orchestrates live migration from one node to another
• Operate with flags (for customer scripting), or in an interactive mode
• Install RAC One Node via patch on top of 11.2.0.1 RAC installation. Patch includes documentation.

© 2010, www.oracledatabase12g.com. 版权所有.文章允许转载,但必须以链接方式注明源地址,否则追究法律责任.

相关文章 | Related posts:

1. Oracle Real Application Clusters Installation and Configuration Best Practices
2. Managing Performance and Availability for 25,000 Siebel Contact Center Users with Oracle Real Application Clusters
3. Upgrade to Oracle Real Application Clusters 11g Release 2 Key Success Factors
4. Adding a Node To 10gR2 RAC cluster
5. Data gathering for troubleshooting Oracle Real Application Cluster issues
6. Benefits From Oracle Real Application Cluster
7. DBA 2.0 Managing Change With Oracle Real Application Testing
8. Oracle Real Application Testing for Earlier Releases of Oracle Database
9. Introduction to Oracle GoldenGate And GG Official Price
10. Oracle GoldenGate:Real-time Access To Real-time Information