WXS XC10 Overview

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IBM WebSphere eXtreme Scale & XC10:An introduction to Elastic Caching

Seema Kumar

WebSphere Product Management


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Agenda What is Elastic Cache?

WebSphere eXtreme Scale v7.1

WebSphere DataPower XC10 Appliance Common Usage Patterns


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Very powerful cache

Scales from simple in-process topologies topowerful distributedtopologies.

Platform for buildingpowerful XTP/Data Gridapplications

Form of in-memory data grid

Manage application state

Scales to 1000s of servers

Sometimes referred to asDistributed ApplicationState Management.

A flexible framework for realizing highperformance, scalable and data-intensive

applicationsNew York San Francisco

London Shanghai

3UseCases

What is Elastic Cache?


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Modern Application Infrastructure Topology

Web Server Tier Back-end SystemsDatabase Tier

App Server Tier Elastic Data Grid

IBM HTTP ServerWebSphere

Application ServerDB2 UDB

DataPower XC10 for simpledata oriented scenarios: HTTP Session Replication Elastic Dynacache

Web Side Cache

eXtreme Scale for maximumflexibility covering data andapplication oriented scenarios

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When do I need an Elastic Grid?


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7Redundant copies of dataat different versions

Traditional Cache Operation Cache capacitydetermined by individualJVM Size. Size of each cache = M # JVMs = N Total cache = M

Invalidation load perserver increases as cluster

grows.

Cold start servers hit thedatabase. AApplication

AApplication

AApplication

AApplication Invalida

tionChatter

Database

Application

Invalidation load

increases with clustersize

New Serverwith cold cache

High load onDatabase


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Application E

D

WebSphere eXtreme Scale Cache Operation

Cache capacity determined bytotal cluster size

Size of each cache = M # JVMs = N Total Cache = M x N

No invalidation chatter

Linearly scalable

Less load on database and no

cold start spikes

Application D C

Application C B

Application B A

Application A

Cache4x Larger

Cache

5x Larger

E


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Innovative Elastic Caching SolutionsData Oriented

Application Oriented

Session management

Elastic DynaCache

Web side cache

Event Processing

In-memory OLTP

Worldwide cache

Petabyte analytics

Data buffer

In-memory SOA

eXtreme Scale

DataPower XC10 Appliance

Ultimate flexibility acrossa broad range of cachingscenarios

In-memory capabilitiesfor application oriented

scenarios

Drop-in cache solutionoptimized and hardenedfor data orientedscenarios

High density, lowfootprint improvesdatacenter efficiency

Elastic caching for linear scalabilityHigh availability data replication

Simplified management, monitoring and administration


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IBM WebSphere eXtreme Scale Proven mature product:

Fourth major release of product with V7.1 in 2010 Used at some of the largest web sites in the world

Lightweight runtime footprint (15MB jar)

Integrates with all versions of WebSphereApplication Server and almost any Java-basedapplication container or Java Virtual Machine

Only requires JavaTM

SE run-time environment Exploits WAS-ND environment when available

Meets the needs of a variety of applicationenvironments: Java SE, Java EE (WAS, WebLogic, Tomcat),

as well as for .Net applications via REST APIs*

Proven multi-data center capabilities

Proven low-latency access to data


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IBM WebSphere DataPower XC10 Appliance V2 Scale out with ease

Large, 240GB elastic cache allows you toscale more economically while providing highQuality of Service

Scales elastically without application downtime

Linear, predictable scaling at predictable cost

Easy drop in use for commonscenarios Support for data-oriented caching scenarios

without rip & replace Unbinds cache from application server memory

constraints

Fault tolerance Lower risk of data loss while providing

continuous availability

Flexible and simple usermanagement Simple solution for real world management

and monitoring


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Easy drop-in use for common scenarios

Simple Cache

HTTP Session Cache

WAS Dynamic Cache

Service (Dynacache)support

Little or no codechanges required!


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Fault Tolerance Create an appliance collective

for high availability

Lowers risk of data loss throughautomatic replication of data

Continuous Availability!

Self Healing - Failures areautomatically detected

Easy to configure


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Common Elastic Caching Scenarios

HTTP Session ReplicationSide CacheData Access LayerData Grid


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HTTP Session Replication Many enterprise applications today

require HTTP session persistence. A grid of JVMs can be established

with the sole purpose of storingHTTP session (or any java)objects.

Isolating the application runtimefrom grid runtime, thereby, freeingup the JVM heap for application

use. Provide linear scalability toaccommodate growth (in # ofsessions or size of sessionobjects).

Providing replication and

management of session objectswithin the grid.

Can even store session objectsacross datacenters.

Session GridWeb App Layer


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16 DataPower XC10 Overview

Common set of Patterns - HTTP Session data cache

No new code required

Extension of legacy session management caching mechanism in WebSphere ApplicationServer

Extensions to WebSphere Application Server administrative console to support WebSphereDataPower XC10 session management caching and WebSphere eXtreme Scale sessionmanagement caching

WebSphere Application Server connects seamlessly to the WebSphere DataPower XC10appliance or WebSphere eXtreme Scale

Client code must be installed on WebSphere Application Server systems

Easily configure WebSphere applications to store HTTP session data to a data cache on theWebSphere DataPower XC10 appliance through the WebSphere Application Severadministrative console

Replaces other session replication mechanisms (memory-to-memory replication)

Removes the need for Database traditionally used for persistence

Enables HTTP session failover between WebSphere Application Server cells


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Active/Active Datacenter HTTP Session Failover

Web Server

PlantsByWebSphereCluster

memory to memoryreplication

Datacenter1

xPlantsByWebSphereCluster

Deployment Manager

PlantsByWebSphereCluster

memory to memoryreplication

Datacenter2

xPlantsByWebSphereCluster

Deployment Manager

WebSphere eXtreme Scale

OR

WebSphere eXtreme Scale


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Side Cache Client first checks the grid before using

the data access layer to connect to aback end data store.

If an object is not returned from the grid(a cache miss), the client uses the dataaccess layer as usual to retrieve the data.

The result is put into the grid to enablefaster access the next time.

The back end remains the system of

record, and usually only a small amountof the data is cached in the grid.

An object is stored only once in thecache, even if multiple clients use it.Thus, more memory is available forcaching, more data can be cached, whichincreases the cache hit rate.

Improve performance and offloadunnecessary workload on backendsystems.


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19 DataPower XC10 Overview

Elastic Caching used as a Side Cache Used to store data for fast, lower-cost access than a database

Uses ObjectMap APIs from WebSphere eXtreme Scale

Client can run in a standard Java EE compliant server environment or inany Java Virtual Machine compliant with Java SE V1.4 or beyond

Dynamic Cache Service Provider for WebSphere Application Server (ND6.1 / ND 7.0) Page fragment cache

Web services cache Command cache

Support L2 Cache Open JPA/Hibernate (WXS only)

Side Cache for Datapower XI50 thru REST Gateway (XC10 only)

Side Cache for WPS/WESB Side Cache for Message Broker


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Objects in the Elastic Data Grid Key, Value pairsKey Value pair examples:

integer key, string value (hex) integer key, compound value

compound key, compound value


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Data Access Layer (WXS only) The grid can be used as a special

data access layer where it isconfigured to use a loader to getdata from the back-end system.

The loader can be configured toasynchronously write back thechanges to the back-end system

Even when the back end is down,the application can write changes.They are buffered in the grid to bewritten back when the back-endsystem comes online again.

Reduced dependency on back enddata store


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Client Usage: Online BankingRetail Banking

35xreducedresponsetimes

22 Milliononline banking users

Next-generation Online Banking

Before: 700ms to login with 2 backend calls

After: 20ms to login with profile cache

access

$6M/yr cost savings in MIPs reduction

3 datacenters: If one datacenter goes downit fails over seamlessly to the others

8Gb of data transfer per hour between DCs

$500kreducedcosts permonth

20xreductionin FCIs

Provide seamless cache infrastructure across applications

Deliver high performance & consistent response times

Ensure high availability of critical online applications


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Entertainment 10xreduced

responsetimes7 Billionrequests per day

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Support transaction-intensive services

Deliver consistent & predictable response times

Take action on growing volumes of business events

Scale with simplicity and lower cost

Fantasy Sports Web InfrastructureBefore: 60ms response time against

database

After: WXS improved to 6ms responsetime 450k concurrent users 80k requests per second up to 1M in

2011

6 weeks from concept to production

Client Usage: Worldwide Fantasy Sports Web Site


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Resources

Fully functional J2SE trial downloadhttp://www.ibm.com/developerworks/downloads/ws/wsdg

/learn.html

Wiki documentationhttp://www.ibm.com/developerworks/wikis/display/objectgrid/Getting+started

User's Guide to WebSphere eXtreme Scalehttp://www.redbooks.ibm.com/abstracts/sg247683.html

Data Sheet

ftp://public.dhe.ibm.com/common/ssi/pm/sp/n/wsd14088usen/WSD14088USEN.PDF

XC10 Web Sitehttp://www-01.ibm.com/software/webservers/appserv/xc10/

Getting Started Wiki for XC10

http://www.ibm.com/developerworks/wikis/display/extremescale/2010/06/25/IBM+WebSphere+DataPower+XC10+appliance+now+available

http://www.ibm.com/developerworks/spaces/xtp

WebSphere Extreme TransactionProcessing for Developers Space willdiscuss various topics for developing anddeploying XTP applications and will pointout emerging trends, benefits, challenges,and features associated with it.

http://www.youtube.com/user/ibmextremescale#p/a

Weekly video podcasts coveringcustomers questions and forum posts onthe IBM WebSphere eXtreme Scale

product.

Additional resources


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Questions?


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Java is the registered trademark of Oracle Corp

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Backup


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Elastic Caching for WebSphere Portal

WXS XC10 Overview

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