WebSphere Application Server V7.0: Concepts ... - IBM Redbooks

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WebSphere MQ server provides the following advantages over a WebSphere MQ link: ► WebSphere MQ server allows applications to exploit the higher availability and optimum load balancing provided by WebSphere MQ on z/OS. ► With WebSphere MQ link, messages from WebSphere MQ are delivered to a queue destination in the bus. When a messaging engine fails, messages at destinations in the messaging engine cannot be accessed until that messaging engine restarts. When you use a WebSphere MQ server that represents a queue sharing group, the bus can continue to access messages on the shared queue even when a queue manager in the queue sharing group fails. This is because the bus can connect to a different queue manager in the queue sharing group to access the same shared queues. ► Messages are not stored within the messaging engine. Messaging applications directly send and receive messages from the queues in WebSphere MQ, making the WebSphere MQ server tolerant of a messaging engine failure. This allows message beans to be configured to immediately process messages as they arrive on an MQ queue. Similarly, any bus mediations take place immediately upon a message appearing on an MQ queue. ► With WebSphere MQ link, applications have to push messages from the WebSphere MQ network end of the link. With WebSphere MQ server, applications can pull messages from the WebSphere MQ network. WebSphere MQ server, therefore, provides a better proposition than WebSphere MQ link in situations requiring optimum load balancing. 10.5 Messaging features: How secure and reliable is it? This section describes some of the lower-level details and requirements of messaging. We cover three categories: security, high availability, and reliability. These are important points that must be factored into any planning. This section contains the following topics: ► “More messaging concepts” on page 351 ► “Planning for security” on page 351 ► “Planning for high availability” on page 352 ► “Planning for reliability” on page 353 350 WebSphere Application Server V7.0: Concepts, Planning, and Design
10.5.1 More messaging concepts We must briefly discuss the following concepts before discussing messaging in more detail. Transport chains The term transport chain describes the process and mechanism that a messaging engine uses to communicate with another messaging engine, external messaging provider, or messaging application running outside of a server with a messaging engine. They are divided into inbound and outbound, and encompass things such as encryption and communication protocols (for example, TCP/IP). Message stores At the center of a message engine is a message store. This is a repository that allows data (messages, operational data, or both) to be stored in both a permanent and temporary fashion. Permanent means that the data will survive a shutdown of the message engine. 10.5.2 Planning for security There are two main areas in messaging security: ► Authorization and authentication of users and groups that want to connect to a bus. ► Securing the transportation of the message from source to destination. Authentication and authorization All access to a service integration bus must be both authorized and authenticated if bus security is turned on. Authentication is done through an external access registry, such as an LDAP server, a custom database, or the local operating system. The user or group must have their credentials validated before they can access the bus. After the user or group is authenticated, they must still be authorized to access bus resources. There is a role called the bus connector role to which the user or group must be assigned. Otherwise, they will be denied access even if the credentials are valid. Chapter 10. Messaging 351
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WebSphere Application Server V7.0:
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Note: Before using this information
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2.2 Tivoli Directory Server . . . .
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5.1.3 Security . . . . . . . . . .
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7.9 WebSphere performance tools . .
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11.4 Web services architecture . .
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14.9.7 Java Command Language (JACL)
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xiv WebSphere Application Server V7
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Trademarks IBM, the IBM logo, and i
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xviii WebSphere Application Server
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Tze Puah is an Application Infrastr
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Become a published author Join us f
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1.1 Java Platform Enterprise Editio
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1.2 WebSphere Application Server ov
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1.2.2 Evolving Java application dev
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Runtime provisioning WebSphere Appl
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WebSphere Application Server suppor
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Installation Factory WebSphere Appl
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WebSphere Application Server for z/
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These features become more importan
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1.4 Supported hardware, platforms,
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Operating systems Versions Linux®
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1.4.5 Directory servers Databases V
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► Product binaries and source cod
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Some of the features of Rational Ap
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Groovy and PHP. It also includes ap
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2.1 Tivoli Access Manager IBM Tivol
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All communication between the Tivol
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LDAP is a fast and simple way of lo
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For WebSphere Application Server Ve
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WebSphere MQ applications can send
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► Technology Adapters These adapt
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The IBM WebSphere DataPower SOA App
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Client or Server Internet IP Firewa
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2.7.1 Integration with WebSphere Ap
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3.1 WebSphere Application Server co
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Administration is greatly enhanced
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About Figure 3-2 : This figure only
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It is also possible to replicate se
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DMgr Node Deployment Manager Node A
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3.1.6 Deployment manager Local conf
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3.1.8 Job manager The administrativ
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Web server plug-ins A Web server ca
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SIP proxy The SIP proxy design is b
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3.1.11 Generic servers A generic se
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► Aligns WebSphere applications c
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3.2.1 Single cell configurations Yo
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Node Agent Application Server Deplo
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Node Agent V5.1 Application Server
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Administrative Agent WebSphere Appl
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Cluster workload management Workloa
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groups enables WebSphere Applicatio
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Mixed topologies Figure 3-23 shows
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3.4 Runtime processes In this secti
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Node Agent Application Server Deplo
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3.5.3 IBM HTTP Server as an unmanag
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4.1 Infrastructure planning This se
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4.2.1 Scalability Scalability, as u
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4.2.2 Caching 6. Reevaluate. Recogn
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- Consider regular maintenance. In
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4.2.6 Security Disaster recovery co
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► Plan for certificates and their
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4.3 Sizing the infrastructure After
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When using a service such as those
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4.5.4 Load factors ► Monitor reso
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4.5.5 Production system tuning This
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4.6 Planning for monitoring As most
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products, like the IBM Tivoli Compo
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4.7.3 Backup plan 4.7.4 Recovery pl
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5.1 Topology selection criteria 5.1
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Load balancing Use load balancing t
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Scaling Scaling represents the abil
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Both of these options are valid app
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- You will more likely have to call
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5.2 Terminology 5.2.1 Load balancer
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WebSphere Application Server Proxy
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WebSphere Application Server V7.0 s
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User Outside World DMZ Internal Net
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Installation and configuration The
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The Web server plug-in distributes
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System D Perform the following step
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primary Load Balancer through heart
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5.3.4 Reverse proxy topology User R
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Installation and configuration: Edg
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System B Perform the following step
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System A 1. Copy the file targetTre
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Note: Each Load Balancer installati
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Disadvantages The major disadvantag
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5.3.6 Heterogeneous cell z/OS DMGR
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Disadvantages The disadvantages of
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Advantages This topology provides t
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The topology in Figure 5-11 shows a
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3. Create an application server pro
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Disadvantages There are no real dis
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This document does not describe the
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When you choose the platform or pla
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6.5 Naming conventions Naming conve
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Forwarding method Each of the avail
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The following examples outline the
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What is next? You can start the Web
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Assume that the application server
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Assume that the application server
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► Slip install Slip install means
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Profile types The types of profiles
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► Secure proxy profile A secure p
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Application server profile options
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Typical settings Advanced options Y
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If each application server will hos
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7.1 What is new in V7.0 IBM WebSphe
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Note: IBM HTTP Server for z/OS offe
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Messaging connection pool When usin
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High availability groups High avail
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Monitoring a system naturally chang
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for tuning and performance. The adv
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synthetic transactions or to track
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► Enterprise JavaBeans (EJB) thin
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Development environment Usually, ea
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WebSphere Application Server provid
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Scenario 3: Using a z/OS security p
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The included extensions to Ajax are
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► SCA Web Services Binding V1.0 T
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14.1 WebSphere Application Server s
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Cell Deployment Manager Control reg
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Request Platinum customer Request G
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Availability The concept of a separ
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► MEMLIMIT setting in the JCL or
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Cell01 Core Group Node01 Deployment
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Member notification To notify the o
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The results of this can be as follo
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Note: If the request exceeds the sp
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garbage collection. The garbage col
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The set of tools is available for W
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14.9 System programmer consideratio
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Intelligent runtime provisioning Th
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Shared class cache This section con
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Because this is a JVM technique tha
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The REUSASID parameter is automatic
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14.10.1 Planning considerations Tab
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Various tools are available to ease
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15.1 Infrastructure migration consi
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15.1.1 Scripting migration Since We
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15.1.6 Mixed cell support To ease t
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Automated migration with mixed vers
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15.7 WebSphere Application Server f
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MMT is intended for use by a system
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5. When you have successfully enter
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Example 15-1 Migration management c
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Tip: The BBOWMG3x job is long runni
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For more information about how to c
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Topology review Client Network (10.
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Advantages Disadvantages Sample top
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► In order to show the new securi
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Installing HTTP Servers (servers B
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Creating Job manager (server E) The
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d. On the Integrated Solutions Cons
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After clicking OK, we got the answe
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One WebSphere Application Server no
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Figure A-10 Additional parameters F
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Figure A-14 Job finished Summary We
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Online resources ► WebSphere Appl
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WebSphere Application Server V7.0:
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