Oracle RAC One Node 12c Overview
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Oracle RAC One Node 12c provides best-in-class single instance Oracle Database availability, better database consolidation, and better database virtualization. It uses Oracle Grid Infrastructure, including Automatic Storage Management and Oracle Clusterware, to provide high availability capabilities like automatic instance failover to another server in case of hardware or software failure. It also enables capabilities like online database relocation to allow patching and maintenance with zero downtime.
Oracle RAC One Node 12c Overview
- 1. 7/8/13 1 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.1 Oracle Real Application Clusters One Node 12c Markus Michalewicz Director of Product Management Oracle Real Application Clusters (RAC)
- 2. 7/8/13 2 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.3 Safe Harbor Statement The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle. Copyright © 2012, Oracle and/or its affiliates. All rights reserved.4 Agenda § Oracle RAC One Node 12c Overview § Oracle RAC One Node 12c for: – Best In-Class Oracle Database Availability – Better Oracle Database Consolidation – Better Oracle Database Virtualization § Oracle RAC One Node 12c and the Rest of the Stack
- 3. 7/8/13 3 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.6 Oracle RAC One Node 12c Oracle RAC One Node 12c provides: 1. Best in-class single instance Oracle Database availability 2. Better database consolidation 3. Better database virtualization Using § A standardized and improved deployment and management § A familiar and matured HA stack – Oracle Grid Infrastructure Oracle Grid Infrastructure (GI): Automatic Storage Management (ASM) Oracle Clusterware (OCW) Oracle Flex ASM CRM Oracle RAC One Node A Oracle RAC One Node B Copyright © 2012, Oracle and/or its affiliates. All rights reserved.8 Standardize on Oracle RAC Different flavors, same management Oracle GIDBA DBA Oracle GIDBA DBA DBA Oracle RAC One Node Oracle RAC High Availability Scalability DBA Oracle Restart Oracle GI
- 4. 7/8/13 4 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.9 Standardize on Oracle RAC For better availability during maintenance operations Oracle GIDBA DBA DBA Oracle RAC High Availability Scalability Online (rolling) Patch and PSU ApplicationOracle GIDBA DBA Oracle RAC One Node Copyright © 2012, Oracle and/or its affiliates. All rights reserved.10 Standardize on Oracle RAC For all the flexibility you need Oracle GIDBA DBA Oracle GIDBA DBA DBA Oracle RAC One Node Oracle RAC Flexibility Scalability Re-configuration to enable cluster Online upgrade DBA Oracle Restart Oracle GI
- 5. 7/8/13 5 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.11 Standardize on Oracle RAC For better agility and consolidation Oracle GIDBA DBA Oracle RAC One Node Oracle GIDBA DBA DBA Oracle RAC Consolidation Agility Copyright © 2012, Oracle and/or its affiliates. All rights reserved.12 Standardize on Oracle RAC and Oracle Multitenant The new standard for Oracle Database Consolidation Oracle GI Oracle RAC One Node Consolidation Agility Oracle GI Oracle RAC
- 6. 7/8/13 6 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.13 Oracle RAC One Node Architecture § Oracle RAC One Node is – an Oracle RAC enabled database – with only one instance running under normal operation § In case of a server or instance failure, the one running instance is started on another server in the cluster (failover) § Online Database Relocation (Oracle RAC One Node specific feature) minimizes downtime during scheduled maintenance operations. Basic features Oracle GI DBA DBA DBB DBB Copyright © 2012, Oracle and/or its affiliates. All rights reserved.14 Oracle RAC One Node vs. Oracle RAC “Always On” vs. “Always Running” Oracle GI DBA DBA DBB DBB Oracle GI DB A DB A DB B DB B § Oracle RAC: multiple instances per database running concurrently § Oracle RAC One Node: one instance per database running at a time
- 7. 7/8/13 7 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.15 Agenda § Oracle RAC One Node 12c Overview § Oracle RAC One Node 12c for: – Best In-Class Oracle Database Availability – Better Oracle Database Consolidation – Better Oracle Database Virtualization § Oracle RAC One Node 12c and the Rest of the Stack Copyright © 2012, Oracle and/or its affiliates. All rights reserved.16 Database Failover § On failure of – a database (DB) instance – Or the server hosting the DB – Or other failures impacting operation § Oracle RAC One Node will fail over the database instance to another server in the cluster § Servers can be chosen using either administrator-managed or policy- managed resource allocation rules Oracle RAC One Node provides standard DB cold-failover functionality Node3Node2 Oracle (Flex) ASM based pool of shared storage Node1 Public Network DBB DBCDBA Oracle Grid Infrastructure DBEDBDDBA
- 8. 7/8/13 8 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.17 Online Database Relocation for better HA § Online Database Relocation minimizes downtime during (scheduled) maintenance operations such as: – Patching – Resource re-allocation due to demand Oracle RAC One Node-specific functionality that makes the difference Node3Node2 Oracle (Flex) ASM based pool of shared storage Node1 Public Network DBB DBC Oracle Grid Infrastructure DBEDBD DBA DBAOnline DB Relocation Copyright © 2012, Oracle and/or its affiliates. All rights reserved.18 Online Database Relocation For no downtime patching and other maintenance operations Node3Node2Node1 Public Network Oracle Grid Infrastructure DBEDBDDBA DBC DB connections DB Service DB Home DBB
- 9. 7/8/13 9 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.19 Online Database Relocation Step 1: Start target DB instance and relocate DB Service Node3Node2Node1 Public Network Oracle Grid Infrastructure DBEDBD DB connections DB Service DBA DBAOnline DB Relocation DBC Copyright © 2012, Oracle and/or its affiliates. All rights reserved.20 Online Database Relocation Step 2: Stop source DB instance transactional Node3Node2Node1 Public Network Oracle Grid Infrastructure DBEDBDDBA Online DB Relocation DBA DB connections DB Service New Connection DBC
- 10. 7/8/13 10 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.21 Online Database Relocation Step 3: Patch Oracle Database home on the source server Node3Node2Node1 Public Network Oracle Grid Infrastructure DBEDBDDBA +1 DB connections DB Service Patch +1 DBC Copyright © 2012, Oracle and/or its affiliates. All rights reserved.22 Online Database Relocation Step 4: Rewind (relocate back) to activate patch usage Node3Node2Node1 Public Network DBC Oracle Grid Infrastructure DBEDBDDBA DB connections DB Service Patched DB Home
- 11. 7/8/13 11 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.23 Online Database Relocation Step 5: Patch remaining home(s) Node3Node2Node1 Public Network Oracle Grid Infrastructure DBEDBDDBA DBCDBB DB connections DB Service Patched DB Home Copyright © 2012, Oracle and/or its affiliates. All rights reserved.24 Online Database Relocation Optimization: 3-step patching for consolidated environments Node3Node2Node1 Public Network Oracle Grid Infrastructure DBEDBDDBA DBC DB connections DB Service DB Home DBB DB connections DB Service Patched DB Home 1 Patch Target 2 Relocate 3 Patch remaining DBA DBB
- 12. 7/8/13 12 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.25 Oracle RAC One Node & Oracle ASM 12c The ideal combination for best in-class high availability ASM Cluster Pool of Storage Disk Group BDisk Group AShared Disk Groups Wide File Striping One to One Mapping of ASM Instances to Servers ASM Instance Database Instance ASM Disk RAC Cluster Node4Node3Node2Node1 Node5ASM ASM ASM ASM ASM ASM Instance Database Instance DBA DBCDBB DBD DBE Copyright © 2012, Oracle and/or its affiliates. All rights reserved.26 Introducing Oracle Flex ASM Removal of One to One Mapping and HA ASM Cluster Pool of Storage Disk Group BDisk Group AShared Disk Groups Wide File Striping Databases share ASM instances ASM Instance Database Instance ASM Disk RAC Cluster Node5Node4Node3Node2Node1 Node5 runs as ASM Client to Node4 Node1 runs as ASM Client to Node2 Node1 runs as ASM Client to Node4 Node2 runs as ASM Client to Node3 ASM ASM ASM ASM Instance DBA DBCDBB DBD DBE
- 13. 7/8/13 13 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.28 Agenda § Oracle RAC One Node 12c Overview § Oracle RAC One Node 12c for: – Best In-Class Oracle Database Availability – Better Oracle Database Consolidation – Better Oracle Database Virtualization § Oracle RAC One Node 12c and the Rest of the Stack Copyright © 2013, Oracle and/or its affiliates. All rights reserved. Confidential – Oracle Restricted29 Private Database Cloud Architectures Oracle Database 12c Dedicated Databases share servers and OS Virtual Machines share servers Pluggable Databases share servers, OS and database Increasing Consolidation
- 14. 7/8/13 14 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.30 Standardize on Oracle RAC Same management, big difference Oracle GIDBA DBA Oracle RAC One Node Oracle GIDBA DBA DBA Oracle RAC Consolidation Agility Copyright © 2012, Oracle and/or its affiliates. All rights reserved.31 RAC One Node – A Consolidation Standard § Use Oracle RAC One Node to – Consolidate Single Instance (SI) DBs – Improve high availability of SI DBs – Improve system utilization and agility – Allocate resources as needed Consolidation, isolation and agility starts with Oracle RAC One Node Node3Node2 Oracle (Flex) ASM based pool of shared storage Node1 Public Network DBB DBC Oracle Grid Infrastructure DBEDBD DBA Time Utilization Peak Average
- 15. 7/8/13 15 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.32 Consolidation and Isolation Use Instance Caging for Isolation Node3Node2 Oracle (Flex) ASM based pool of shared storage Node1 Public Network DBB DBC Oracle Grid Infrastructure DBEDBD DBA Node2 DBB DBD CPU_COUNT=12 CPU_COUNT=4 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.33 Standardize on Oracle RAC and Oracle Multitenant The new standard for Oracle Database Consolidation Oracle GI Oracle RAC One Node Consolidation Agility Oracle GI Oracle RAC
- 16. 7/8/13 16 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.34 Oracle RAC One Node for Oracle Multitenant Start off with a Single Instance, non-CDB Server Database Instance Services Server Database Instance CRM North CRM South Services CRM Reporting Copyright © 2012, Oracle and/or its affiliates. All rights reserved.35 Oracle RAC One Node for Oracle Multitenant Convert to a RAC Database, non-CDB Node 1 Services Node 1 Oracle RAC One Node Instance Services Node 2 CRM North CRM South CRM Reporting Oracle RAC One Node Instance
- 17. 7/8/13 17 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.36 Oracle RAC One Node for Oracle Multitenant Convert to an Oracle RAC One Node-based CDB Node2Node1 CDB Services RAC One Node CDB Instance Copyright © 2012, Oracle and/or its affiliates. All rights reserved.37 Oracle RAC One Node for Oracle Multitenant Add additional PDBs as needed Node2Node1 CDB Services RAC One Node CDB Instance
- 18. 7/8/13 18 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.38 Oracle RAC One Node for Oracle Multitenant Benefit from the Oracle RAC One Node features immediately Node2Node1 CDB Services RAC One Node CDB Instance RAC One Node CDB Instance Copyright © 2012, Oracle and/or its affiliates. All rights reserved.39 Agenda § Oracle RAC One Node 12c Overview § Oracle RAC One Node 12c for: – Best In-Class Oracle Database Availability – Better Oracle Database Consolidation – Better Oracle Database Virtualization § Oracle RAC One Node 12c and the Rest of the Stack
- 19. 7/8/13 19 Copyright © 2013, Oracle and/or its affiliates. All rights reserved. Confidential – Oracle Restricted40 Private Database Cloud Architectures Oracle Database 12c Dedicated Databases share servers and OS Virtual Machines share servers Pluggable Databases share servers, OS and database Increasing Consolidation Copyright © 2012, Oracle and/or its affiliates. All rights reserved.41 Virtualization – a Black Box Approach A simple solution without insight Bare-Metal Server DOM-0 Hypervisor Guest Dom-0 Guest Bare-Metal Server DOM-0Hypervisor Dom-0 GuestGuest
- 20. 7/8/13 20 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.42 Live Migration = Moving a Black Box Live Migration moves a black box from one server to another Bare-Metal Server DOM-0 Hypervisor Guest Dom-0 Guest Bare-Metal Server DOM-0Hypervisor Dom-0 GuestGuest Live Migration Copyright © 2012, Oracle and/or its affiliates. All rights reserved.43 Virtual Machine HA = Restarting a Black Box Virtual Machine HA restarts / fails over a virtual machine on failure Bare-Metal Server DOM-0 Hypervisor Guest Dom-0 Guest Bare-Metal Server DOM-0Hypervisor Dom-0 GuestGuest
- 21. 7/8/13 21 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.44 Virtual Machine HA = Restarting a Black Box But what if the application needs attention? Bare-Metal Server DOM-0 Hypervisor Guest Dom-0 Guest Bare-Metal Server DOM-0Hypervisor Dom-0 Guest DBA ? Copyright © 2012, Oracle and/or its affiliates. All rights reserved.45 High Availability Requires Insight The Oracle RAC One Node Stack provides the insight Bare-Metal Server DOM-0 Hypervisor Guest Dom-0 Guest Bare-Metal Server DOM-0Hypervisor Dom-0 GuestGuest DBB DBC DBEDBD DBA +1 DBC Online DB Relocation DBA
- 22. 7/8/13 22 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.47 Agenda § Oracle RAC One Node 12c Overview § Oracle RAC One Node 12c for: – Best In-Class Oracle Database Availability – Better Oracle Database Consolidation – Better Oracle Database Virtualization § Oracle RAC One Node 12c and the Rest of the Stack Copyright © 2012, Oracle and/or its affiliates. All rights reserved.48 Application Continuity
- 23. 7/8/13 23 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.49 Dealing with Unknown Transaction State CRM Pre-Oracle Database 12c § Database outages can cause in-flight work to be lost, leaving users and applications in doubt § Often leads to – User pains – Duplicate submissions – Rebooting mid-tiers – Developer pains DBA DBA DBB DBB Copyright © 2012, Oracle and/or its affiliates. All rights reserved.50 Tackling In-Flight Work for Unplanned Outages § Transaction Guard – A Reliable protocol and API that returns the outcome of the last transaction § Application Continuity – Safely attempts to replay in-flight work following outages and planned operations. Two New Features
- 24. 7/8/13 24 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.51 DBA DBA Application Continuity CRM Masks Unplanned & Planned Outages § Replays in-flight (DML) work on recoverable errors § Masks many hardware, software, network, storage errors and outages when successful § Improves end-user experience and productivity without requiring custom application development✔ DBB DBB Copyright © 2013, Oracle and/or its affiliates. All rights reserved.52 Application Continuity – Example Application Servers Database Servers End User A reliable replay of in flight work Network Switches User selects product from application and purchases it from the web checkout User transaction arrives at application infrastructure. It makes it’s way through the application tiers and results in a database transaction being created
- 25. 7/8/13 25 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.53 Application Continuity – Example Application Servers Database Servers End User A reliable replay of in flight work Network Switches The infrastructure hosting the database fails just before the transaction is committed to the database. Copyright © 2013, Oracle and/or its affiliates. All rights reserved.54 Application Continuity – Example Application Servers Database Servers End User A reliable replay of in flight work Network Switches The jdbc driver detects the failure and checks with an available node in the cluster, using “Transaction Guard”, whether the transaction committed or needs to be replayed If the transaction needs to be replayed, “Application Continuity” will submit all of the inflight work to a surviving node in the cluster and perform a commit. This all happens transparently to the application
- 26. 7/8/13 26 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.55 Application Continuity – Example Application Servers Database Servers End User A reliable replay of in flight work Network Switches The user receives confirmation that his order has been successfully completed. Copyright © 2013, Oracle and/or its affiliates. All rights reserved.56 Policy Management
- 27. 7/8/13 27 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.57 Policy-Managed Databases Highly available workload management Policy Min Max Importance Online Retail 2 4 High Self Service 1 2 Low Free Pool Lowest Allocate resources § As demand requires it § As the business requires it: § Over the period of one day § As the system requires it: § For automated management tasks Copyright © 2012, Oracle and/or its affiliates. All rights reserved.58 Policy-Managed Databases Better High Availability for any cluster Improve HA § By choosing servers from the least important server pool § Accommodating for double or multiple subsequent failures § For planned maintenance: § Allocate backup servers in the cluster 1 2 Policy Min Max Importance Online Retail 2 4 High Self Service 1 2 Low Free Pool Lowest
- 28. 7/8/13 28 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.59 Policy-based Cluster Management Server Pools that understand and make a difference • Oracle RAC One Node 12c • Actively utilizes differently sized servers • Server Pool management has been improved to understand server differences in the cluster: • Server attributes are stored per server • Server Pools are set up using Server Categories • Servers are allocated to pools based on categories • Combine only test servers in one pool • Remove servers from test-pool preferably • Ensure a minimum size of servers per pool Server Categories • NAME • ACL • EXPRESSION • … Server Attributes • NAME • MEMORY_SIZE • CPU_COUNT • CPU_CLOCK_RATE • CPU_HYPERTHREADING • CPU_EQUIVALENCY • … Copyright © 2012, Oracle and/or its affiliates. All rights reserved.60 What-If Command Evaluation Complex cluster management made predictable • Oracle RAC One Node 12c What-If Command Evaluation • Helps to set up and validate policies • Helps to plan for downtime scenarios • Analyze the impact beforehand • Ensure smooth cluster operations • What-If Command Evolution supports: • Set Active Policy • Server Pool, server or resource modification • E.g. addition, relocation or removal • Special commands for failure evaluation PROD MAIL Action: Move server between pools
- 29. 7/8/13 29 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.61 Oracle Flex Cluster Copyright © 2012, Oracle and/or its affiliates. All rights reserved.62 Oracle Flex Cluster Flexibility and High Availability as demand requires it § Oracle Flex Cluster – A new Oracle Clusterware based High Availability clustering topology § Utilizing two types of cluster nodes: – Hub nodes § Traditional nodes, tightly coupled via network and storage, used for running IO intensive workload – Leaf nodes § A new type of node that runs a lighter weight stack § Maintain their own failure and heartbeat settings § Do not require direct shared storage connectivity § Used for processing oriented (application) workload – Leaf nodes can be virtualized. Hub Nodes Leaf Nodes
- 30. 7/8/13 30 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.63 Oracle Flex Cluster The new standard for resource management in the cluster DBA DBB DBC DBE Hub Nodes Leaf Nodes § Oracle Flex Cluster: – The new standard for flexible resource management in the cluster § Use it as demand requires it § Inherits all Flex ASM HA capabilities § Enables policy-managed clusters. – Efficient High Availability and resource management across tiers § Lightweight cluster stack on leaf nodes – Benefit from virtualization and physical deployments in one cluster DBD Copyright © 2012, Oracle and/or its affiliates. All rights reserved.64 Oracle Flex Cluster Better HA clustering for all applications § Standardized management across applications – Global resource allocation and dependencies – Oracle Bundled Agents (XAG) for application HA § www.oracle.com/goto/clusterware Start Stop DBA DBB DBC DBB DBB
- 31. 7/8/13 31 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.65 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.66