oracle rac one node 12c overview
DESCRIPTION
Overview of the new Oracle RAC One Node 12cTRANSCRIPT
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Oracle Real Application Clusters One Node 12c Markus Michalewicz Director of Product Management Oracle Real Application Clusters (RAC)
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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.
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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
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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
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Standardize on Oracle RAC Different flavors, same management
Oracle GI DB A DB A
Oracle GI DB A DB A
DB A
Oracle RAC One Node Oracle RAC
High Availability
Scal
abili
ty
DB A
Oracle Restart
Oracle GI
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Standardize on Oracle RAC For better availability during maintenance operations
Oracle GI DB A DB A
DB A Oracle RAC
High Availability
Scal
abili
ty
Online (rolling) Patch and PSU Application Oracle GI DB A
DB A Oracle RAC One Node
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Standardize on Oracle RAC For all the flexibility you need
Oracle GI DB A DB A
Oracle GI DB A DB A
DB A
Oracle RAC One Node Oracle RAC
Flexibility
Scal
abili
ty
Re-configuration
to enable cluster
Online
upgrade
DB A
Oracle Restart
Oracle GI
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Standardize on Oracle RAC For better agility and consolidation
Oracle GI DB A DB A
Oracle RAC One Node
Oracle GI DB A DB A
DB A Oracle RAC
Consolidation
Agi
lity
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Standardize on Oracle RAC and Oracle Multitenant The new standard for Oracle Database Consolidation
Oracle GI
Oracle RAC One Node
Consolidation
Agi
lity
Oracle GI
Oracle RAC
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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 DB A
DB A
DB B
DB B
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Oracle RAC One Node vs. Oracle RAC “Always On” vs. “Always Running”
Oracle GI DB A
DB A
DB B
DB B
Oracle GI
DBA
DBA
DBB
DBB
§ Oracle RAC: multiple instances per database running concurrently
§ Oracle RAC One Node: one instance per database running at a time
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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
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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
Node3 Node2
Oracle (Flex) ASM based pool of shared storage
Node1
Public Network
DBB DBC DBA
Oracle Grid Infrastructure
DBE DBD DBA
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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
Node3 Node2
Oracle (Flex) ASM based pool of shared storage
Node1
Public Network
DBB DBC
Oracle Grid Infrastructure
DBE DBD DBA
DBA Online DB Relocation
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Online Database Relocation For no downtime patching and other maintenance operations
Node3 Node2 Node1
Public Network
Oracle Grid Infrastructure
DBE DBD DBA DBC
DB connections
DB Service
DB Home
DBB
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Online Database Relocation Step 1: Start target DB instance and relocate DB Service
Node3 Node2 Node1
Public Network
Oracle Grid Infrastructure
DBE DBD
DB connections
DB Service
DBA DBA Online DB Relocation
DBC
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Online Database Relocation Step 2: Stop source DB instance transactional
Node3 Node2 Node1
Public Network
Oracle Grid Infrastructure
DBE DBD DBA Online DB Relocation DBA
DB connections
DB Service
New Connection
DBC
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Online Database Relocation Step 3: Patch Oracle Database home on the source server
Node3 Node2 Node1
Public Network
Oracle Grid Infrastructure
DBE DBD DBA
+1
DB connections
DB Service
Patch +1
DBC
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Online Database Relocation Step 4: Rewind (relocate back) to activate patch usage
Node3 Node2 Node1
Public Network
DBC
Oracle Grid Infrastructure
DBE DBD DBA
DB connections
DB Service
Patched DB Home
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Online Database Relocation Step 5: Patch remaining home(s)
Node3 Node2 Node1
Public Network
Oracle Grid Infrastructure
DBE DBD DBA DBC DBB
DB connections
DB Service
Patched DB Home
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Online Database Relocation Optimization: 3-step patching for consolidated environments
Node3 Node2 Node1
Public Network
Oracle Grid Infrastructure
DBE DBD DBA 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
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Oracle RAC One Node & Oracle ASM 12c The ideal combination for best in-class high availability
ASM Cluster Pool of Storage
Disk Group B Disk Group A Shared Disk Groups Wide File Striping
One to One Mapping of ASM Instances to Servers
ASM Instance
Database Instance
ASM Disk
RAC Cluster
Node4 Node3 Node2 Node1 Node5 ASM ASM ASM ASM ASM
ASM Instance
Database Instance
DBA DBC DBB DBD DBE
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Introducing Oracle Flex ASM Removal of One to One Mapping and HA
ASM Cluster Pool of Storage
Disk Group B Disk Group A Shared Disk Groups Wide File Striping
Databases share ASM instances
ASM Instance
Database Instance
ASM Disk
RAC Cluster
Node5 Node4 Node3 Node2 Node1
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 DBC DBB DBD DBE
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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
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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
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Standardize on Oracle RAC Same management, big difference
Oracle GI DB A DB A
Oracle RAC One Node
Oracle GI DB A DB A
DB A Oracle RAC
Consolidation
Agi
lity
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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
Node3 Node2
Oracle (Flex) ASM based pool of shared storage
Node1
Public Network
DBB DBC
Oracle Grid Infrastructure
DBE DBD DBA
Time
Util
izat
ion
Peak Average
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Consolidation and Isolation Use Instance Caging for Isolation
Node3 Node2
Oracle (Flex) ASM based pool of shared storage
Node1
Public Network
DBB DBC
Oracle Grid Infrastructure
DBE DBD DBA
Node2
DBB
DBD
CPU_COUNT=12
CPU_COUNT=4
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Standardize on Oracle RAC and Oracle Multitenant The new standard for Oracle Database Consolidation
Oracle GI
Oracle RAC One Node
Consolidation
Agi
lity
Oracle GI
Oracle RAC
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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
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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
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Oracle RAC One Node for Oracle Multitenant Convert to an Oracle RAC One Node-based CDB
Node2 Node1
CDB
Services
RAC One Node CDB Instance
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Oracle RAC One Node for Oracle Multitenant Add additional PDBs as needed
Node2 Node1
CDB
Services
RAC One Node CDB Instance
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Oracle RAC One Node for Oracle Multitenant Benefit from the Oracle RAC One Node features immediately
Node2 Node1
CDB
Services
RAC One Node CDB Instance
RAC One Node CDB Instance
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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
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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
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Virtualization – a Black Box Approach A simple solution without insight
Bare-Metal Server
DOM-0 Hypervisor Guest
Dom-0 Guest
Bare-Metal Server
DOM-0 Hypervisor
Dom-0 Guest Guest
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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-0 Hypervisor
Dom-0 Guest Guest
Live Migration
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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-0 Hypervisor
Dom-0 Guest Guest
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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-0 Hypervisor
Dom-0 Guest
DBA ?
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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-0 Hypervisor
Dom-0 Guest Guest
DBB
DBC
DBE DBD
DBA +1
DBC Online DB Relocation DBA
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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
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Application Continuity
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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
DB A DB A
DB B DB B
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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
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DB A DB A
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 ✔ DB B
DB B
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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
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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.
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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
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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.
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Policy Management
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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
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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
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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 • …
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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
Action: Move server
between pools
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Oracle Flex Cluster
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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
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Oracle Flex Cluster The new standard for resource management in the cluster
DB A DB B
DB C
DB E
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
DB D
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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
Sta
rt
Stop
DB A DB B
DB C DB B
DB B
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