SAILFIN
WEBINAR
Overview of Converged Load-Balancer
Kshitiz Saxena
CLB Eng. Lead,
Sun Microsystems, Inc
Converged Load-Balancer Overview
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SAILFIN
WEBINAR
Agenda
Why Converged Load Balancer
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Deployment Topology
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Heterogeneous Application Deployments
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What JavaEE developer needs to know
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Load Balancing Policies
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Health Detect Mechanism
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Configuration interface
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Demo
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References
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Converged Load-Balancer Overview
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SAILFIN
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Why we need Converged Load Balancer
SIP, Converged Applications
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Messages over Web path and SIP path need to be
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directed to same server replica.
Multiple client invocations need to be directed to same
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server replica.
SIP component can result in outgoing requests as well.
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Converged Load-Balancer Overview
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SAILFIN
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Deployment Topology
Converged Load-Balancer Overview
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SAILFIN
WEBINAR
Deployment Topology
Converged Load-Balancer Overview
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Heterogeneous Application Deployments
Pure JavaEE Web Applications, SIP Applications,
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Converged SIP and JavaEE Applications.
Application Level Load Balancing.
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Load Balancing and Fail-over of pure Web App's over
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HTTP protocol.
Converged Load Balancing and Fail-over of SIP,
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Converged App's over SIP and HTTP application
protocol.
Converged Load-Balancer Overview
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SAILFIN
WEBINAR
What JavaEE developer needs to know
Primarily needs to concentrate on building a distributable
application using standard platform constructs.
+
Data Centric Rules
Converged Load-Balancer Overview
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Load Balancing policies
Consistent Hash Algorithm
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Hash key is extracted from request using configured data-
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centric rules or default-headers
Above hash key is used to pick which instance should
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service the request
Requests mapping to unhealthy instances are failed over
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to other healthy instances
Fail-over is restricted to cluster boundary
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Used for pure sip applications and converged applications
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Converged Load-Balancer Overview
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SAILFIN
WEBINAR
Load Balancing policies(cont ...)
Round Robin Algorithm
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Instance to service request are selected in round-robin
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fashion from a set of healthy instances
Sticky requests are serviced by same instance if it is
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healthy
Sticky requests for unhealthy instances are failed over
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to other healthy instances
Fail-over is restricted to cluster boundary
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Used for pure web applications
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Converged Load-Balancer Overview
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WEBINAR
Health Check Mechanism
CLB gathers cluster health information from Group
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Management Service(GMS) at startup
CLB registers itself as listener for GMS events
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GMS propagates all cluster view change events to CLB
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Converged Load-Balancer Overview
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SAILFIN
WEBINAR
Configuration interface
CLI
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Sailfin user can create CLB using asadmin command
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asadmin > create-converged-lb --target <cluster-
name> --autocommit=true --configfile <converged-
load-balancer-xml> <converged-load-balancer-name>
GUI
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Sailfin user can create CLB using admin GUI
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interface as well
Converged Load-Balancer Overview
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SAILFIN
WEBINAR
DEMO
Converged Load-Balancer Overview
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References
Documentation :
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http://docs.sun.com/app/docs/doc/820-4287/gghcl?
a=view
Functional Specification : http://wiki.glassfish.java.net/
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attach/FunctionalSpecsOnePagers/ConvergedLB-
FSD.pdf
Blog :
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http://blogs.sun.com/kshitiz/entry/converged_load_balan
cer
Converged Load-Balancer Overview
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SAILFIN
WEBINAR
Thanks
Kshitiz Saxena
CLB Eng. Lead,
Sun Microsystems, Inc
Converged Load-Balancer Overview
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