Application Server

WebSphere Application Server
Concept
Frédéric Dutheil
[email protected]
Certified IT Architect
WebSphere Technical Sales and Solutions
1
WebSphere Application Server
Les éditions disponibles
WAS
WASND
ND
WAS
WASzOS
zOS
WAS
WASHypevisor
Hypevisor
WAS
WAS
WAS
WASExpress
Express
WAS
WASLiberty
LibertyProfile
Profile
Core
CoreEdition
Edition
Un serveur d’application
innovant rapide et
hautement
personnalisable. “use
what do you need”
Fournit un accès
sécurisé, un moteur de
haute performance pour
des transactions de
taille moyenne avec des
capacités de clustering
et de cache applicatif.
Permet une haute
disponibilité, avec
des capacités de
performance et de
gestion avancées,
pour des
applications à
mission critique.
Application Server
 The platform on which Java language-based applications run.
 It provides services that can be used by business applications, such
as database connectivity, threading, and workload management.
Application Server Architecture
 Internal architecture of WebSphere Application Server
Available in ND
platform only.
Base and Express
doesn’t have this
capability
Standalone Application Servers
 each application server acts as a unique entity (functions
independent from all others)
 each can be managed from its own administrative console
 stand-alone servers can be managed from a central point by using
administrative agents and a job manager
Distributed Application Servers
 a distributed server configuration
‒ built by the Network Deployment packaging
‒ enable central administration, workload management, and failover
Profiles
 Runtime environments are built by creating profiles.
 Product files
‒ a set of read-only static files or product binary files that are shared by any
instances of the WebSphere Application Server product.
 Configuration files (profiles)
‒ a set of user-customizable data files. This file set includes WebSphere
configuration, installed applications, resource adapters, properties, log
files, and so on.
Profiles
 Each profile is stored in a unique directory path
Cell
 A grouping of nodes into a single administrative domain.
 In the Base and Express configurations:
‒ contains one node and that node contains one server
Cell in ND Environment
 A Cell is a virtual unit that is built of a Deployment Manager and one
or more nodes.
 The Deployment Manager is a process (in fact it is an special WAS
instance) responsible for
‒
‒
‒
‒
Managing the installation and maintenance of Applications
Connection Pools and other resources related to a J2EE environment
Centralizing user repositories for application
Centralizing WAS authentication and authorization.
 Can contains nodes that are
running on mixed platform
Node, Node Agent, Server
 The Node
‒ virtual unit that is built of a Node Agent and one or more Server instances
 One Node = One Profile
 The Node Agent
‒ Process responsible for spawning and killing server processes and also
responsible for configuration synchronization between the Deployment
Manager and the Node.
 Servers
‒ Java process responsible for serving J2EE requests (eg.: serving
JSP/JSF pages, serving EJB calls, consuming JMS queues, etc).
Cell in Standalone & Network Deployment
Environment
Admin Agent
 is a component that provides enhanced management capabilities for
stand-alone (Express and Base) application servers
Web Server Plug-in
 The web server plug-in is used to route requests to one of multiple
application servers
Cluster
 virtual units that groups Servers
 servers is managed together
 resources added to the Cluster are propagated to every Server that
makes up the cluster
 Provide highly available
‒ because requests are automatically routed to the running servers in the
event of a failure
 A cell can include no clusters, one cluster, or multiple clusters
 Optimizes the distribution of client processing requests
 Workload management in term of
‒ Servlet using HTTP traffic-handling device, e.g IBM HTTP Server
‒ EJB requests
Vertical & Horizontal Clustering (Scaling)
Vertical
Horizontal
Mixed Clustering
http://www.ibm.com/software/fr/websphere/