1 copyright © 2012, oracle and/or its affiliates. all ... · in-memory database cache accelerates...


Oracle In-Memory Database Cache Overview

Simon Law

Product Manager


Needs of the Real-Time Enterprise Blazingly Fast Response Competitive Advantage

• Fraud detection

• Order matching

• Compliance

• Provisioning

• Authentication

• Authorization

• Personalization

• CRM

• Business Activity Monitoring

• Real-time Billing

NEW CUSTOMER

SIGN-UP

WEB

SELF-CARE

MGMT

DASHBOARD

MOBILE DATA

SERVICES

PROCESS AN ORDER

SCHEDULE CALCULATE BILL VERIFY CREDIT & TERMS CHECK ADDRESS

ACTIVATE A NEW SUBSCRIBER MONITOR FOR CRITICAL EVENTS


Typical Application Deployment Model

• Applications communicating to

the database over network

• Business logic in PL/SQL

• Different caching techniques to

improve database application

performance

– Result set caches

– Object caches

– Application / Database tier

caches

SQL

PL/SQL

Application

Application

Application


Challenges with different caching techniques

• Data Model

– Object vs. Relational – application transparency

• Read-Only or Read-Write Cache

– Content gets stale over time – invalidate or refresh cache

– Updates require propagation to Oracle database

• Query Capability

• Persistency and High Availability

– Can cache be available if database is not available?

• Significant development effort to achieve all the above


Oracle In-Memory Database Cache

Real-Time Applications

TimesTen In-Memory Database

Application TimesTen In-Memory Database

Application


Application

• Built using Oracle TimesTen

In-Memory Database – Full featured RDBMS

– Scale up and scale-out with in-memory

cache grid

• Cache Oracle database tables and

run SQL and PL/SQL in the

application-tier – Extremely fast response time and very

high throughput


TIMESTEN IN-MEMORY DATABASE


Oracle TimesTen In-Memory Database Memory-Optimized Relational Database

• In-memory RDBMS optimized for RAM speed

• Exceptional performance

– Low latency response time

– High throughput

– Embeddable

• Persistent and durable

– Transactions and checkpoints persisted to

disk storage

• Compatible with Oracle Database

– Standard SQL, PL/SQL, Datatypes

– JDBC, ODBC, ADO.NET, OCI, Pro*C

Direct-Linked

Application TimesTen

Libraries

Client-Server


Client Lib

Memory-Resident

Database

Client/ Server

JDBC / ODBC / ADO.NET / OCI / PLSQL

Checkpoint Files

Transaction Log Files

Fast

data

access


Lightning Fast Response Time

10 Millionths of

a second 2.5

Millionths of

a second 0

4

8M

icro

se

co

nd

s

Read a Record Update Transaction

Average Response Time


7 Millionths of

a second

1.78 Millionths of

a second

Oracle TimesTen In-Memory Database 11.2.2.0 - Intel Xeon 5670 2.93Ghz, 2 CPUs, 6 cores/CPU - Oracle Linux 5.6


0

500,000

1,000,000

1,500,000

2,000,000

2,500,000

3,000,000

3,500,000

4,000,000

4,500,000

1 2 4 6 8 10 12

560,212792,858

1,550,766

2,155,411

2,890,719

3,553,895

4,144,896

Tra

ns

ac

tio

ns P

er S

ec

on

d

Number of Concurrent Processes

Throughput Scalability for OLTP Workloads 100% Read Workload on Oracle Exalogic

4.1M Reads

per Second


0

200,000

400,000

600,000

800,000

1,000,000

1,200,000

1,400,000

1,600,000

1,800,000

2,000,000

2,200,000

1 2 4 6 8 10 12

287,461

458,555

856,235

1,015,445

1,550,077

1,710,622

2,132,053

Tra

ns

ac

tio

ns

p

er

Se

co

nd

Number of Concurrent Processes

Throughput Scalability for OLTP Workloads Mixed-Transaction Workload on Oracle Exalogic

2.13M

Updates per

Second


IN-MEMORY DATABASE CACHE


Oracle In-Memory Database Cache

• Oracle Database option

• Runs in the application-tier

• Caches subset of Oracle Database

• Accelerates applications with micro-second response time

• Scales up on SMP

• Scales out on commodity hardware

• Supports read/write caching

• Automatic synchronization with Oracle Database

• Built-in high availability

Real-Time Applications


Application TimesTen In-Memory Database

Application


Application


In-Memory Database Cache Accelerates Oracle Database Applications

• Cache subset of Oracle Database tables

• Applications access cache tables like

regular relational tables

– Standard SQL with JDBC, ODBC,

ODP.NET, OCI, Pro*C, PL/SQL

• Read-only and read/write cache tables – Transactions with ACID properties

– Persistent and durable

• Automatic data synchronization with the

Oracle database Database Tier

Client/ Server

JDBC / ODBC / ADO.NET / OCI / PLSQL Checkpoint Files

Transaction Log Files

App -Tier Server

Client-Server


Client Lib

Direct-Linked


Libraries


In-Memory Database Cache Flexible Cache Group Configurations Application

Transactions Cache Groups

Automatic Data

Synchronization

• Cache Group describes the data in the Oracle

database to cache

• Collection of related tables

– All or subset of rows and columns

– Defined via SQL clause CREATE CACHE GROUP PremierUsers

FROM OE.CUSTOMER (

CUSTID NUMBER NOT NULL,

NAME VARCHAR2(100) )

WHERE CUSTOMER.ORDER > 500;

• Cache tables are regular database tables in

TimesTen

– Joins/search, insert/update/delete


In-Memory Database Caching

Read-Write caching • Transactions committed in TimesTen

cache

• Parallel write-through of committed

transactions to Oracle Database

Read-only caching • Transactions committed in Oracle

Database

• Multi-stream refresh of committed

transactions to TimesTen

Automatic

Data

Synchronization

Data Synchronization

Application Application

Application

Reads/Write

transactions Reads/Write

transactions

Reads/Write

transactions


In-Memory Database Cache Grid

• Location transparency

• Usage-driven, adaptive

redistribution of cached data

• Online addition/removal of

cache nodes

• Scale out with growth

• Parallel searches

• Transactional consistency

Application

Application

Application

Application

Incremental Scalability


DEMO

IN-MEMORY DATABASE CACHE


Mobile Prepaid Subscriber Application Demo

Presentation

Exalogic Cloud

• Java/JDBC application

• X2-2 quarter-rack Exalogic

• Transactions executed and committed

in TimesTen, then asynchronously

write-through to Oracle Database

• Five transactions types – Authenticate account user

– Check account balance

– Update account profile

– Refill, credit, or debit account

– Search accounts with a low balance


HIGH AVAILABILITY AND

MAXIMUM AVAILABILITY ARCHITECTURE


Real-Time Replication High Availability and Disaster Recovery

• Real-time transactional parallel replication

– Memory to memory

• High performance

– Asynchronous replication

– Synchronous replication

• Low-latency durability

• Multiple topologies, including

– Active Standby Pair

– Active Active – Split Workload

• Robust and reliable

– LAN and WAN configurations

– Data compression

Read-Only Subscribers

- Reader Farm

- Disaster Recovery

Application

Transactions

Active

Application Reads

on Hot Standby

Standby

Subscriber Subscriber

Subscriber


Read-write and Read-only Caching

• Read-write caching – Parallel replication of transactions from

Active to Standby

– Parallel write-through of transactions to Oracle Database

• Read-only caching – Multi-stream refresh of transactions

from Oracle Database

– Parallel replication of refresh transactions to Standby

• Application continues even if Oracle Database connection is down

High Availability

Automatic

Synchronization

Hot Standby

available for reads Application

Transactions

Active Standby


Automatic Client Connection Failover

• Available for Client / Server connections

– Configurable by the application

• Automatic connection failover

– When TimesTen database failovers to Standby server

• Automatic re-connect application to the new Active server

– Connection handle is preserved

• Connection failover notification (like TAF)

– Available if subscribed


Integration with Oracle RAC Cross-tier High Availability

• Automatic recovery from

Oracle Database RAC node

failures using TAF and FAN – Automatic reconnection to the cluster

– Automatic resumption of data refresh

from Oracle to TimesTen

– Automatic resumption transaction

propagation from TimesTen to Oracle

– No loss of transactions

Active Standby


Integration with Oracle Clusterware Automated Management, Monitoring and Failover

• Manages TimesTen / IMDB

Cache processes

• Monitors and detects failure of – Nodes

– TimesTen / IMDB Cache processes

– Applications

• Manages automatic failover

• Assign new roles

• Recovers automatically

• Provision spare nodes

Shared

Storage

Clusterware

Active Standby Subscriber Subscriber

Subscriber

Spare Nodes


In-Memory Database Cache Grid

• Cache Grid is resilient to

Grid Member failure

• High availability with

replication providing fast

failover

• Automated failover and

recovery via Oracle

Clusterware integration

Built-In High Availability

Standby

Active

Standby

Active

Standby

Active

Standby

Active


Integration with Oracle Data Guard

• Support synchronous

physical standby

• Failover

• Switchover

• Rolling upgrade

Oracle Maximum Availability Architecture

Real Application Clusters Standby Oracle Database

Data Guard

Application

In-Memory Database Cache

Application

Application


APIS AND TOOLS


Application Development

SQL

PL/SQL

Languages C/C++/C#

ODBC

ttClasses

OCI, Pro*C

ADO.NET

J2EE App Servers OR Mapping Java/JDBC

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TimesTen Support in SQL Developer

• Browse, Edit, Create, Alter TimesTen database objects

• Simplify Caching of Oracle Database tables

– Create, Drop, Alter cache groups

– Load, Unload, Flush, Refresh cache data

• Develop PL/SQL procedures, functions, and packages

• Show SQL execution plans, update statistics

• Run pre-defined, create reports

• Access SQL Worksheet for ad-hoc

queries, execute TimesTen

built-in procedures

Database Application Development


TimesTen System Monitoring Tool Plug-In for Oracle Enterprise Manager

• Monitor key performance

metrics

• User defined thresholds for

alerts and notifications

• Out-of-the-box reports for

TimesTen metrics

• Create custom reports with

graphical report wizard

• Low overhead


Summary

• Scalable, highly available database architecture

• TimesTen for real-time access

• Oracle Database for long-term

storage and analysis

• Fault Tolerant with TimesTen

replication

• In-memory response time and

massive throughput … the best of

all worlds

Application Application

Application


For More Information

• Technology white papers

• Quick Start Guide and tutorials

• Discussion Forum

• And more..

http://www.oracle.com/technetwork/database/timesten


Q&A Q&A

1 copyright © 2012, oracle and/or its affiliates. all ... · in-memory database cache accelerates...

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