JOnAS 5 and EasyBeans make clustering easy › ... › ClusteringJOnAS5.pdf · Jk/Tomcat 6...

© OW2 Consortium 2008

JOnAS 5 and EasyBeans make clustering easy

[email protected]://jonas.ow2.org

mailto:[email protected]


Introduction

Java EE clustering for Scalability High availability

Java EE cluster

Means Loadbalancing Replication Failover


Agenda

JOnAS 5.0 is available !

News in clustering Jk/Tomcat 6 Clustering CMI V2, a powerful clustering solution for EJB2/EJB3 Some enhancements in the cluster management

Next

4© OW2 Consortium 2008

JOnAS 5.0


Agenda



Next


Jk/Tomcat 6 clustering

Mod_jk Last, 1.2.26 Java Api for managing the configuration (JkStatus ant task)

Session replication enhancements Primary/Backup mode for scalability

• org.apache.catalina.ha.session.BackupManager Store session at one or two backup servers Communication between nodes relies on Apache/Tribes

project


Agenda


News in clustering Jk/Tomcat 6 Clustering CMI V2, a powerful clustering solution for

EJB2/EJB3 Some enhancements in the cluster management

Next


Integration with JOnAS EJB2.1 container and Easybeans EJB3 container

SLSB EJB3 support (SFSB coming soon)

Beyond java EE, CMI might be used for clustering RMI objects

EJB2 and EJB3 support


jrmp, iiop, irmi

Modularity, the CMI layer is separated of the protocol ones

Multi-protocols support

jrmp iiop irmi

cmi

carol

appli


Service and control flows separation, last one handled by a dedicated thread

Stubs pool Management capability coming soon

Performance oriented

Control flow

Service flow

Stubs pool


Dynamic load-balancing parameters 1/2

J1Update Cluster logic

Master node

Ctrl flow

Cluster logic V1Cluster logic V2

Cluster logic is downloaded from the server Provided policies : round robin, first available, ha singleton,

random Different strategies : local preference, load factor, …

Can be updated at the runtime from jonasAdmin (JMX)


Dynamic load-balancing parameters

2/2

J1


Stopping without service/session interruption Disables the server, the new connections are refused, only

the existing clients are served

Blacklist a server through JMX interface or jonasAdmin console

Smooth stopping


Automatic switch cmi if available, otherwise jrmp

Cluster mode transparent for the client


Reduced API not linked to the JOnAS version and the application Upper layer classes are downloaded from the server

(smartfactory)

Large Scalesupport

Client JVM

API CMIAPP SF

1.Fi

rst l

ooku

p

Cluster2. Socket connection

3. API download

4. Lookup processing


Deployment Descriptor (specific) ‘clusterpolicy’ element specifies the policy configuration file

name

‘clusterreplicated’ element specifies whether the SFSB must be replicated

Configuration file example (roundrobinpolicy.xml, located in the ejbjar module)

EJB2 ClusteringParameters

<cmi xmlns="http://org.ow2.carol.cmi.info.mapping"> <clusteredObject> <clusterName>sampleCluster2</clusterName> <policyType>org.ow2.carol.cmi.lb.policy.RoundRobinPolicy</policyType> <strategyType>org.ow2.carol.cmi.lb.strategy.LocalPreference</policyType> </clusteredObject></cmi>

Administration purposes

… <cluster-policy>round-robin-policy.xml</cluster-policy>…

… <cluster-replicated>round-robin-policy.xml</cluster-replicated>…


Annotations Set the cluster logic parameters Example

EJB3 ClusteringParameters

@Cluster(name="test_cluster")@LBPolicy(RoundRobinPolicy.class)@LBStrategy(LocalPreference.class)

@Stateless@Remote(StatelessSession.class)public class StatelessSessionBean implements StatelessSession {…}

Administration purposes


Agenda



Next


Domain management

Server 2

Server 1

master Domain

JMX Rem

ote


Log visualizationfrom jonasAdmin

Remote access through domain management


New implementation of the discovery service

On top of JGroups Previous version ip multicast based (still available)

Advantages The protocol stack can be configured regarding the

user environnement (jgroupsdiscovery.xml)• Eg. UDP stack for when multicast are not filtered

and TCP stack otherwise


Monitoring the cluster daemon

DiscoveryStatistics on the machine (memory, os, proc, …)


Management of the cluster daemon

From jonasAdmin console• Add/remove a server


Monitoring graphics

Tracking statistics, counters and others monitoring indicators in graphics


Agenda



Next


Workplan

sampleCluster3Dynamic replicationCluster cache

Application level (Terracotta assessment)

Abstract layer for GCP (Unifor)Vertical Replication

JOnAS 5 and EasyBeans make clustering easy › ... › ClusteringJOnAS5.pdf · Jk/Tomcat 6...

Documents

Transcript of JOnAS 5 and EasyBeans make clustering easy › ... › ClusteringJOnAS5.pdf · Jk/Tomcat 6...