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Merrill Holt Director Parallel Server Product Management Oracle Corporation - PowerPoint PPT Presentation

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Merrill Holt Director Parallel Server Product Management Oracle Corporation. Oracle Parallel Server Cache Fusion Delivers Scalability Oracle9 i. Oracle9 i Parallel Server. Oracle9 i Parallel Server is designed for today’s most demanding deployments

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Merrill HoltDirector

Parallel Server Product Management

Oracle Corporation

Oracle9 i parallel server
Oracle9i Parallel Server

  • Oracle9i Parallel Server is designed for today’s most demanding deployments

    • Server consolidation means very large user populations

    • Critical e-business requires full time service

    • Rapid growth shortens capacity planning

Oracle9 i parallel server1
Oracle9i Parallel Server

  • Major changes in Oracle9i

    • Scalability with full Cache Fusion architecture

    • Improved availability

    • Improved manageability

Oracle parallel server architecture
Oracle Parallel Server Architecture



Centralized Management Console

No Single

Point Of Failure

Low Latency Interconnect

VIA or Proprietary

High Speed Switch or Interconnect

ClusteredDatabase Servers

Hub or Switch Fabric

Storage Area Network

Drive and Exploit Industry Advances in Clustering

Mirrored Disk Subsystem

Database challenges scalability
Database Challenges: Scalability

  • Scale to Millions of Users

    • Transparently

    • All types of applications

  • Scale workloads without limits

  • Grow storage easily

Oracle Parallel Server

Scalability overview
Scalability Overview

  • Transparent application scalability

  • Enhanced IPC (Inter-Process Communication)

  • Simplification of lock configuration

  • Tuning flexibility

  • Tuning automation

Out of the box transparent application scalability
Out-of-the-Box Transparent Application Scalability

  • In the past clustered databases scaled well for specific types of applications

    • Data Warehouse

    • Parallel-enabled OLTP

  • Oracle Parallel Server with Cache Fusion is a breakthrough in parallel database technology delivering transparent scalability to all types of applications

Cache fusion architecture

Cache Fusion

Shared Cache

Cache Fusion Architecture


  • Full Cache Fusion

    • Cache-to-cache data shipping

    • Shared cache eliminates slow I/O

    • Enhanced IPC

  • Allows Flexibleand Transparent Deployment

Full cache fusion

Node A

Node B


Data Transfer

Database buffers

Database buffers


Full Cache Fusion

  • Oracle9i Cache Fusion increases performance and scalability by reducing communication latency

    • Data is shipped directly over high speed interconnect

    • Minimize disk I/O

Cache fusion manages inter instance requests
Cache Fusion ManagesInter Instance Requests

  • Readers and writers accessing instance A gain access to blocks in instance B’s buffer cache

  • Four types of block contention

  • Coordination by Distributed Lock Manager

Lock StatusBlock inCache B

Request for BlockCache A









Transparent scaling
Transparent Scaling

  • Scalable Instance Coordination

    • Multiple LMDs (Lock Manager Daemon)

    • Intelligent message batching

    • Enhanced flow control and buffer handling

    • Faster, concurrent cross instance calls using IPC instead of multiple DLM operations

    • Enhanced asynchronous IPC

Distributed lock manager
Distributed Lock Manager



Inter-instance lock processing

Shared Pool





Processes in a parallel server instance
Processes in a Parallel Server Instance

Fulfills lock manager service for PCM locks Handles CacheFusion Processing


Other Processes






Provides Cluster Monitoring



Foreground Processes (Oracle Shadow Processes)


Enhanced ipc
Enhanced IPC

  • Global IPC service layer

    • Each requesting server process handles asynch IPC

    • Efficient I/O implementation

  • Remote memory operations for direct DMA

    • Exploit modern low latency interfaces

  • New V$ tables for IPC statistics

Lock simplification and automation
Lock Simplification and Automation

  • Automatic DLM configuration

    • Automatic derivation of DLM configuration

    • No INIT.ORA lock parameters required

    • Improved lock efficiency and memory management

  • Dynamic lock affinity

    • DLM locks dynamically remastered reducing locking overhead

    • Cache layer determines policy for remastering

Tuning flexibility
Tuning Flexibility

  • Improved insert concurrency

  • Flexibility in free-list group mangement

    • Add free-list groups to existing database objects

    • Altering free-list groups of existing database objects

Database challenges availability
Database Challenges:Availability

  • Be available all the time

    • design for fault tolerance

    • provide fast andreliable fault recovery

    • eliminate maintenance downtime

  • Support mission-critical business operations

Oracle Parallel Server

No single point of failure
No Single Point of Failure

  • Parallel Server

    • Exploits clusters for very high availability

    • Overcomes the limitations of traditional failover solutions by providing:

      • Concurrent processing

      • Load Balancing

      • Fast time to recovery

  • No single point of failure

    • Network, Storage

    • CPU, OS

New in oracle9i availability features
NEW in Oracle9i: Availability Features

  • Reduced time to recovery

    • Concurrent lock reconfiguration and instance (cache) recovery

      • Lock replay only for dead masters/locks

      • Deferred/lazy lock remastering

      • Batching of reconfiguration messages

      • Parallel replay processing by multiple LMDs

      • Optimal lock invalidation

      • Optimized special reconfiguration case (e.g. 2->1)

  • Fast/reliable detection of node/network failure

Database challenges manageability
Database Challenges: FeaturesManageability

  • Create one virtual system to configure and manage

  • Single system image for the database integrated with the cluster

Oracle Parallel Server

Oracle parallel server manageability
Oracle Parallel Server Manageability Features

  • Single system Image

    • Single Oracle Database

    • One virtual system to configure and manage

    • Single management console

  • Cluster-wide Monitoring & Diagnostics

New in oracle9 i parallel server manageability features
NEW in Oracle9 Featuresi: Parallel Server Manageability Features

  • Improved Single System Image

  • Exploit cluster file systems

  • Improved tools infrastructure for management

    • Oracle Universal Installer (OUI)

    • Enterprise Manager (EM)

    • Database Configuration Assistant (DBCA)

    • Net8 Assistant (Net8CA)

    • Recovery Manager (RMAN)

  • First pass diagnostics

Improved configuration
Improved Configuration Features

  • Centralized, persistent configuration storage

    • Eliminates consistency problems with the per node text file based Parallel Server configuration in prior versions.

    • Utilities to migrate previous Parallel Server configurations

  • Enhanced DBCA & Net8CA functionality

    • Robustness

    • Capability to add and delete instances

Improved administration
Improved Administration Features

  • Dynamic node addition to cluster

    • Add a node in both the system and Parallel Server

  • Better integration with Oracle Enterprise Manager

    • View and update server side initialization parameter file (SPFILE)

    • Assign private rollback segments to Parallel Server instances

Improved administration1
Improved Administration Features

  • Better integration with OEM (Contd.)

    • Enhanced monitoring capability and events available with OEM and performance packs

      • Cache Fusion statistics

      • Statistics for interconnect block traffic

      • Statistics for the entire database or per instance

      • New EM events associated with new statistics

Improved diagnosibility
Improved Diagnosibility Features

  • Server side capability

    • First pass analysis on problems

      • Reduces the turnaround time to resolve bugs

      • Enables analysis of intermittent, hard to reproduce problems

    • Reduces need for diagnostic patches

Microsoft windows platform integration
Microsoft Windows Platform Integration Features

  • Integration with Microsoft Cluster Server

  • Cluster Pre-install Tool

    • Disk diagnostics

    • Extensive consistency checks across nodes

  • Multi-Instance Capability

    • Enable multiple instances on a single node

  • Multi-Database Capability

    • Support multiple databases on the same cluster

Oracle9 i delivers performance and scalability
Oracle9 Featuresi Delivers Performance and Scalability

  • In today’s rapidly changing environment:

    • Internet users and transaction volumes grow extremely rapidly

    • Data warehouse systems must support very large data volumes

    • Server consolidation drives the need for large scale systems

  • Oracle9i provides the ability to deploy as you grow

Q Features