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000-253 IBM WebSphere Application Server Network Deployment V6.1 Core Administration

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000-253 exam Dumps Source : IBM WebSphere Application Server Network Deployment V6.1 Core Administration

Test Code : 000-253
Test designation : IBM WebSphere Application Server Network Deployment V6.1 Core Administration
Vendor designation : IBM
: 187 real Questions

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IBM IBM WebSphere Application Server

IBM claims WebSphere 5.0 offers 'true' internet features integration | killexams.com real Questions and Pass4sure dumps

IBM used its DeveloperWorks live convention in San Francisco to publish the forthcoming availability of the latest version of its utility server. It claims WebSphere 5.0 is the primary within the business to present "proper" compliance with rising web features specifications, providing seamless procedure-level integration between J2EE and Microsoft .net environments. great Blue likewise announced a raft of tweaks and improvements to different products in its ever-widening WebSphere middleware and integration strong.

Context: recent information puts IBM both on degree footing or just forward of its chief vie BEA techniques within the Java-based software server space, giving both companies about a 3rd of the market each and every -- even though huge Blue claims its business is growing to be faster than BEA's.

while the growing to be maturity of the application server market is prompting some to remark that the foremost avid gamers fill extra or much less reached functional parity with their items, IBM says its latest efforts divulge it is ahead of the expertise curve. The technology component is only fraction of the customary cost proposition, however IBM believes it newest raft of updates will proceed to apply the drive on its main competitors.

utility server and integration technologies may additionally pellucid up diverse complications, but IBM claims its differentiator is the convergence of both applied sciences, with the software server as the underlying "engine." hence the rebranding of IBM's integration middleware under the WebSphere banner, which now comprises MQ collection and the company technique integration know-how it got from CrossWorlds.

elements: WebSphere edition 5.0 is with beta clients now and should birth shipping flawless the artery through the third quarter. Key updates comprise complete compliance with J2EE 1.3, the latest spec to emerge from the Java community, in addition to "advanced" net features capabilities.

youngsters IBM claimed WebSphere 4.0 was the trade's first app server to aid net features necessities corresponding to XML, soap, WSDL and UDDI (which BEA would strongly contest), V5 contains whatever thing IBM calls dynamic application interaction.

whereas net capabilities-based mostly purposes are developed the usage of requisites equivalent to WSDL or cleaning soap, the interaction of these applications at a system or workflow flush is truly written expressly for either the .internet or the J2EE atmosphere, IBM argues. before, this required added coding to allow internet services to exist in in reality heterogeneous environments. IBM says WebSphere V5 is the first application server to bridge this immediately.

It does this through more suitable integration between Java Message carrier (JMS) and enterprise JavaBean (EJB) environments, which wield the interactions among J2EE accessories and other messaging methods, including these written for .internet. together with advanced J2EE Connector structure (JCA) help, this has the web impact of enabling builders to point to J2EE and .web-primarily based purposes and net services as reusable services, which could in turn expose application flows as an internet provider. moreover, business Rule Beans enable company analysts to update company rules without having handy-code application alterations.

"valued clientele are starting to install web functions, however they don't exigency to fulfill a J2EE or .net determination," says Ed Harbour, director of WebSphere Commerce at IBM. IBM says it is the best vendor that has publicly announced this kindly of ability.

In tune with IBM's dedication to pass-pollinate applied sciences in its middleware portfolio, V5 comes bundled with website efficiency management, authentication and access wield application from Tivoli.

Product strategy: IBM likewise launched modern and rebundled versions of its integration application which are designed to simplify the pricing and packaging structure and figure a springboard for impending 'verticalized' releases.

New technologies consist of the WebSphere MQ event broking service, an extension to IBM's message queuing family that enables businesses to 'multicast' unique counsel to subscribers in line with their particular person preferences. IBM claims its potential to achieve up this tips throughout public networks is entertaining, although it admits other multicasting items akin to Tibco's software from Talarian are commonly comparable.

IBM has additionally rebundled MQ and CrossWorlds capabilities to target essentially the most complicated environments present in tremendous companies. WebSphere company Integration 4.1 makes a speciality of automating business strategies, human intervention projects and information transformation and routing, and as such is an amalgam of applied sciences prior to now regularly occurring because the CrossWorlds InterChange Server, MQ Integrator broker and MQ Workflow.

the chief component is IBM CrossWorlds 4.1, which contains a sequence of method-stage connectors for net services and fiscal guidance exchange, as well as extenders for Siebel's software community. IBM will continue to repurpose this expertise for different perpendicular markets, including retail distribution, telecom, automotive, electronics and insurance, beginning in Q3. it's going to likewise liberate a revamped set of B2B connectors in June, targeted at inter-company enterprise system integration the employ of web capabilities and different transport protocols.

Conclusion: although shoppers may soundless bewitch it as a since IBM integration applied sciences will proceed to adapt, the announcements this week sharpen IBM's message of being capable of decipher company-pushed integration issues via a sequence of chunk-sized modules designed notably for more than a few perpendicular industries. The deliverables fill yet to arrive, however IBM says flawless the integral ISV partnerships are in zone for a launch in the next month or so.

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IBM i Has Been Getting With The software For Years | killexams.com real Questions and Pass4sure dumps

February four, 2019 Timothy Prickett Morgan

there are lots of things that one could constructively censure IBM about when it comes to the energy techniques platform working the IBM i working system. however, in fresh years at the least, a kindly of issues would now not be – and will now not be – that the business has no longer accomplished enough to comprise probably the most crucial aspects of the modern programming toolbox.

basically, the business has finished and increasingly pleasurable job of embracing and extending the compilers, interpreters, frameworks, and fashions of the programming languages which fill long gone mainstream on the grounds that Java first took the stage at the beginning of the dot-com growth in 1996 as an attempt to carry a simplified variant of C++, dwelling in an idealized, simplified, and importantly transportable hardware abstraction called a digital laptop. on account that that time, huge Blue and the IBM i community fill labored collectively, regularly with the community out in front with the lively involvement of the IBMers within the developerWorks company, to convey the Apache net server and the Tomcat software server the OS/four hundred, i5/OS and IBM i platform together with programming languages similar to Perl, php, Python, and Node.js, and versioning tools comparable to Git, and other techniques utility which are are simple rig for up to date programmers.

The 2019 version of the IBM i marketplace Survey, which was released in January and which is spearheaded by artery of Tom Huntington, govt vice chairman of technical options at HelpSystems, offered some perception into what is going on accessible on the programming entrance. The survey turned into performed remaining October and had 700 respondents, with 57 percent coming from the united states but simplest 2 p.c from Canada; another 19 percent got here from Europe, 15 p.c came from Latin the usa, and the remnant was prick up across Australia, Asia, and Africa. As they fill brought up before, here is now not precisely consultant of the precise IBM i achieve in base, which is more heavily dispensed outdoor of the U.S.; but the numbers are regularly transferring within the commandeer direction as HelpSystems interprets the survey into extra languages and companies such because it Jungle motivate readers to bewitch the survey.

The variety of operating techniques supported on the vigour systems platform and the capability to snap in tools created for Unix-like working methods into the PASE AIX runtime embedded in OS/four hundred and its successors is a key component to the faculty to secure and employ tools that other platforms have. (in this method, IBM preserves its personal advantages reminiscent of RPG company language programming and an integrated relational database administration rig and grafts on the advantages of different platforms, giving it a figure of hybrid energy.) And IBM i stores were embracing that working gadget diversity on the platform and becoming less based on home windows Server machines working on X86 iron in other places in the datacenter, as that you would be able to espy from this working gadget distribution from the survey:

\

only 22 % of the groups surveyed referred to that they fill been most efficient working the IBM i platform, and albeit, they determine it difficult to believe that this quantity isn't zero % given how pervasive home windows file and print servers are. but it surely is workable to head it lonesome with IBM i, perhaps in factory or far off retail settings, and it is workable so they will bewitch the survey respondents at pan value. what's enjoyable in this chart is that the proportion of windows Server is falling. again in the day, somewhere north of 95 percent of IBM midrange retail outlets suggested using home windows Server alongside their OS/400 and i5/OS machines, and this has been trending down as Linux, each on power methods iron inner of PowerVM logical partitions and on outboard X86 methods, is on the rise. AIX has gained some penetration at IBM i stores, too, each on distinctive vigour programs rig and on PowerVM partitions on the identical machines operating IBM i.

As you may mediate about, RPG remains essentially the most criterion programming language in employ at IBM i stores, with over 84 % of respondents asserting they employ RPG to create purposes (or bought RPG functions from third celebration software carriers that do). The SQL database programming language ranks number two, at seventy two percent, followed by using the CL scripting language autochthonous to IBM at forty seven % and Java at 41 %. here’s the rundown of programming language adoption:

There are a brace of enchanting issues happening right here. First, whereas 68 p.c of shops document the employ of windows Server of their IBM i shops, handiest 17 p.c negate they are the usage of the .web framework from Microsoft for programming, which supports visible primary and the Java-inspired (that’s the satisfactory means to claim that) C# languages. they would fill notion that after two and a half many years, Java would were up there with RPG and SQL as a favored language, but that has no longer took place. The share of COBOL is about the historical trend and tends to be concentrated in the monetary functions and assurance industries where code became ported from mainframes so many decades ago.

agencies fill been most likely allowed to dwelling down multiple programming language as fraction of the survey, and if you add up the entire percentages, you secure 320 %, which implies an arithmetic imply of 3.2 languages in employ per web page on customary throughout the IBM i achieve in base. (smartly, as a minimum this higher echelon – through which they imply the lively component, now not the biggest companies or these with the greatest machines – fraction of the IBM i base. They don’t be watchful of the ease about the americans who don’t bewitch surveys and they believe that the statistics that changed into gathered for the 5 years of the IBM i industry Survey are representative of these energetic retail outlets. That capacity those that preserve their programs and operating systems relatively present and that mind to be greater inclined to adopt newer applied sciences, starting from storage zone networks to elevated availability clustering to advanced programming thoughts.) we're of two minds about this usual. First, RPG, SQL, and CL dominate, and mixed they give you a customary of two languages. They feel there are lots of sites that peculiarly employ RPG and SQL, principally folks that fill third party application software. it is censorious to recognise that the survey query become not what languages had been used to create your purposes, however rather what languages are used for brand modern utility building. So the base may fill much more diverse and an improved numerical distribution of compilers and interpreters than this statistics implies. I don’t believe this is the case, however probably averages more fondness 5 languages as a result of whether they are watchful of it or no longer, there’s likely some SQL, CL, or Java operating someplace within the application stack.

The survey asked corporations about what open source applied sciences they fill got deployed of their IBM midrange shops, and trust it or now not the Apache web server, which IBM first commercialized because the kernel of WebSphere back in 1998, continues to be on the upward propel and that's probably happening as fewer and fewer stores employ home windows Server for software and net serving and more stores scramble native. That the autochthonous Apache web server has only forty p.c penetration tells you what those home windows Server that tarry are doing. it's a coalesce of print, file, web, and software serving plus a robust dose of SQL Server for analytical database processing that organizations don’t want to installation natively on their IBM i machines. Python and Node.js are on a gentle upward thrust, and the Git versioning device is finding its own stage, too.

What they will’t know from the first 5 surveys and what they might want to understand within the sixth next yr is what percentage of RPG is being coded within the simultaneous free figure trend it really is more fondness what Java does and what percentage remains the employ of the older college, more tightly restrained older RPG mannequin. My guess is that for brand modern code, it is likely as exorbitant as half and half, and that's mirrored in the proven fact that about fill of the groups surveyed stated that that they had bought Rational Developer for i and fill been the employ of it for as a minimum some application coding. About a third of the businesses which fill RDi negate they're the employ of it for flawless of their utility development, about a 3rd negate it's around half and half, and a third negate it is under half. regular that out and it's averaging around half of the applications at half of the agencies surveyed are completed the usage of RDi, which implies free figure RPG.

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what is "Liberty Profile" - IBM WebSphere utility Server V8.5 | killexams.com real Questions and Pass4sure dumps

"Liberty Profile" - IBM WebSphere utility Server V8.5

IBM WebSphere software Server V8.5 Liberty profile is a flexible and dynamic server profile of was which makes it workable for the changed into server to deploy most efficient required customized aspects in its dwelling of deploying a huge set of available JEE add-ons.

what is Liberty profile in IBM became?

Liberty Profile is a component of IBM WebSphere software Server V8.5.5.5. It is very lightweight profile of WebSphere utility Server. Liberty profile is a flexible and dynamic profile of became which permits the became server to install only required customized points in its dwelling of deploying a huge set of purchasable JEE components. developers can select required elements in accordance with company requirement and propel it to app server. turned into Liberty profile is gold criterion flawless for developers working on mission crucial business functions. It may well be even used for construction deployment. latest version of IBM changed into Liberty profile is Java EE 6 criticism and works well for purposes using this Java EE 6 licensed web profile.

Liberty profile is often known as mild weight, down sized edition of changed into starting from eight.5. they will resolve to employ the selfsame for utility structure if they now fill constrained and smartly described set of server add-ons.

become Liberty profile architecture

structure fraction Description

  • Liberty Kernel:  it's the core server profile component.
  • Java EE 6+ :  commonplace Java EE6 API
  • elements: JSP, JSF, net App safety, Servlet, JMS and many others.
  • applications: internet purposes, business applications
  • OSGi Framework Runtime: In-constructed evade time bundles
  • word:

    "Liberty profile is a fraction of IBM changed into Product and it is sent as an in-built core feature of the WebSphere application Server. Liberty profile is not in any respect a divide product. it is a runtime ambiance for application server (changed into) with a prosperous feature set that varies through WebSphere utility Server varied editions.”

    How turned into Liberty Profile Works?

    If internet-utility requires most efficient a servlet engine, then rather than beginning flawless different accessories liberty profile handiest begins the was kernel, the HTTP transport and the web container in order that builders can rapidly start and deploy the functions.

    If an utility wants persistence office in their utility and would fondness to employ JPA issuer component to entry relational data (RDBMS), developer simply should add JPA configuration in XML and Liberty profile will fulfill it accessible persistence within the software.

    The set of points which they will outline in <featureManager> tag describes the concrete profile for the configured server particular instance and then those lists of features are tailor-made for the application deployed to the application server. Internally, these facets are a discrete set of JARs which is nothing however the OSGi bundles which can be initialized and began as soon as they are delivered to the server configuration file (e.g. server.xml ). <function> tag is employ to outline app specific JEE elements.

    the liberty profile works on a dynamic runtime ambiance known as OSGi runtime. OSGi features are used to exploit JEE based component lifecycles, and the injection of dependencies and their runtime configuration. After this step server technique and contains a lone JVM, customary because the Liberty kernel, and any variety of non-compulsory points required by means of the functions. After that configured feature code and lots of the kernel code both runs as unbiased OSGi bundles or OSGi modules inside an OSGi framework (Open device Gateway).

    the liberty profile supports a subset of the total WebSphere software Server programming model. It supports beneath forms-

  • web applications
  • OSGi functions
  • business JavaBeans (EJB) applications
  • OSGi Framework Lifecycle

    OSGi framework follows OSGi Lifecycle for his or her Bundles. under is the criterion lifecycle of OSGi.

    how to installation become Liberty profile?

    There are two ways to down load and set up the liberty profile runtime

  • From within your Eclipse IDE.
  • As a standalone JAR file that you just installation from the command line.
  • Please mention beneath URLs for down load

    https://developer.ibm.com/wasdev/downloads/

    http://market.eclipse.org/content material/ibm%C2%AE-webspherep.cC2percentAE-software-server-v85-liberty-profile-developer-tools-eclipse-helios-indigo

    Why should i exploit changed into Liberty Profile?

    There are some key benefits of using Liberty profile runtime which is listed under:

    became Liberty profile essential configuration

    Liberty profile makes it really convenient to configure their server in a extremely essential and efficient artery the employ of XML file. for example, default server.xml configuration file can likewise contemplate fondness below:

    <server description="test server"> <!--enable points which you'd want to employ --> <featureManager> <function>jsp-2.2</characteristic> </featureManager> <httpEndpoint id="appHttpEndpoint" host="localhost" httpPort="9080" httpsPort="9443" /> </server>

    As per above default server.xml configuration in reality permits the JSP 2.2 characteristic, which depends upon the Servlet 3.0 characteristic; hence the Servlet feature is immediately enabled. They needn't to convene and define it explicitly in became server.xml configuration file.

    turned into Liberty profile configuration "Code Snippets"

    beneath are some code snippet to configure was Liberty Profile. they will employ the selfsame as and when required in the utility development.

    <server> <featureManager> <feature>servlet-3.0</characteristic> <characteristic>mylocalConnector-1.x</function> </featureManager> </server>

    above code will permit servlet-three.0 API and myLocalConnector-1.x for the configured software within the IBM WebSphere Server.

    <server description= "Dev Server DV 33-04"> <featureManager> <function>servlet-three.x</feature> </featureManager> <utility identification="TestWebApp" location="WebApps/test.battle" identify="TestWebApp" class="warfare" </server>

    above code will permit servlet-3.0 API and a elegant war file named as examine.war below web utility TestWebApp.

    <server description="My check server"> <featureManager> <!--allow jndi api for datasource lookups --> <characteristic>jndi-1.0</characteristic> </featureManager> </server> above code will allow jndi-1.0 version for application. <client> <featureManager> <function>javaeeClient-7.x</function> <featureManager> <software identity="CLIENT_APP_ID_VALUE" identify="CLIENT_APP_TYPE" class="ear" region="clientAppType.ear"/> </client>

    above code will permit java customer api v7 and apply this to when installation as an EAR file.

    datasource configuration snippet

    <?xml version="1.0" encoding="UTF-eight"?> <server description="My check DB server"> <!-- enable aspects --> <featureManager> <function>jdbc-4.x</characteristic> </featureManager> <datasource databaseName="$become.server.dir/CustomerDB" id="datasource_id" jndiName="data/jndi/look up/bank/CustomerDB" </server>

    above code will allow jdbc-4.0 API and enable configured database identify in keeping with jndi lookup.

    normal JEE specification in was Liberty profile

    beneath Oracle JEE/J2EE/JSR specifications are available in stable IBM changed into Liberty profile. builders can configure any aspects using above code snippets based on application requirement.

  • CDI 1.2
  • JSP 2.three and EL three.0
  • application client 1.0
  • JASPIC 1.1
  • JACC 1.5
  • SIP Servlets 1.1 and equipment
  • SPNEGO assist
  • OSGi App integration
  • JDBC 4.1
  • OSGi & internet 3.1 side configuration for OSGi bundles
  • JAX-RS 2.0 client wizard
  • support for remote development
  • Auto-scaling and dynamic routing
  • precise-Time Communications (WebRTC) and CouchDB
  • JAX-RS 2.0, Java Batch
  • JMS 2.0, JPA 2.1
  • Bean validation 1.1
  • JSON-P 1.0
  • EJB three.2 Lite
  • Concurrent-1.0
  • Servlet 3.1
  • OpenID connect
  • Java eight toleration
  • WebSockets
  • Challenges 

    1.  the liberty Profile is free to employ which is pleasurable but simplest in structure environment not in construction atmosphere. If they are looking to scramble to production with the liberty Profile they are able to anyhow exigency to pay the customary IBM became licensing can freight which does not sounds respectable.

    2.  There are different lightweight servers obtainable today in the market which is free even for construction atmosphere so identifying Liberty profile over these options nonetheless deserve to be evaluated.

    three.  the liberty Profile does not supply any UI fondness administrative console to office server selected valuable configuration moves fondness updating the server config or setting up/uninstalling purposes and so on. so they fill to rely on Eclipse/RAD/NetBeans editor to supersede the server.xml file or they exigency to manually adjust it which does not contemplate a feasible option for builders.

    4.  application builders examine this server to Tomcat and Glassfish which fill already been around for decades so it may well be one of the most greatest challenges for relocating to liberty profile.

    5.  In newest edition liberty profile is arising with lot of modern facets so it might be entertaining to espy how the liberty Profile handles the increase functionality load with both footprint and size (approx. 60MB).

    6.  For reduce IBM WebSphere Server versions (5, 6, 7) it isn't compatible which could be a challenge for builders and applications using them.

    abstract

    In a nutshell they will negate that Liberty Profile is likely one of the quickest altering and most wonderful app servers to monitor available on the market nowadays. So they should really seat of attention on their upcoming releases. modern Beta models are developing very at once in the market with lot of latest aspects which can employ in their applications with just an light configuration. IBM should soundless basically focus on structure UI and a few Migration Apps for Liberty Profile builders if you want to impulsively undertake it as examine to different main rivals fondness Tomcat, Glassfish, Joss etc. It could be basically exciting to espy how the newest models of Liberty Profile address the raise performance with both footprint and dimension which is the predominant plus with IBM become Liberty Profile.

    References

    https://developer.ibm.com/wasdev/websphere-liberty/

    https://developer.ibm.com/wasdev/

    https://developer.ibm.com/wasdev/weblog/2013/03/29/introducing_the_liberty_profile/

    https://www-01.ibm.com/aid/knowledgecenter/was_beta_liberty/com.ibm.websphere.wlp.nd.multiplatform.doc/ae/cwlp_arch.htmlhttps://developer.ibm.com/wasdev/medical doctors/setting up-functions-wdt-liberty-


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    While these options exist to store HTTP session and state beyond the life of an application server or JVM, facilitating elevated availability, these approaches fill challenges of their own. The growth and changing dynamic of the e-business applications, fill forced application infrastructure to rethink the session persistence strategies.  Some of these growing challenges include:

    a.       employ of runtime real-estate i.e. application server JVM mound to store session, seems inefficient employ of resources.

    b.      Higher administrative and maintenance costs due to increase in user base and subsequent linear growth in application hosting infrastructure.

    c.       Performance consideration of storing, replicating and managing state of session objects.

    d.      Performance consideration due to great session objects in some specific employ cases.

    The challenges around session storage revolve around performance costs due to serialization of the session kick to a database or to other Application servers/JVMs across the network. This performance costs coupled with the management of session state such as replication, updates and invalidation as add significant performance bottlenecks to the application hosting platforms.

    Figure 1: recollection to recollection session replication.

    Figure 2: Database session replication.

  • Why employ WXS?
  • Websphere eXtreme Scale (WXS) attempts to address these performance considerations by introducing a modern technological platform that purports improvised management and replication, thus addressing the challenges imposed by conventional HTTP session persistent mechanism. It is to be notable that while WXS likewise employs the recollection to recollection replication of http sessions, it significantly differs from the selfsame mechanism employed by the WebSphere Network Deployment. WXS provides features such as QoS, replication reliability and linear scalability, which is non existent in Websphere ND. WXS distinguishes itself from traditional approaches in the following ways:

  • Enabling a grid of JVMs with a sole purpose of storing Http session (or any java) objects.
  • Isolating the application runtime from grid runtime, thereby, freeing up the JVM mound for application use.
  • Provide linear scalability to accommodate growth, with growth in sessions or size of session objects.
  • Providing an implicit replication and management of session objects within the grid.
  • <*NEW*> With Zone back enabling storing of session objects across geographically disperse datacenters (and cells), overcoming the traditional limitation of lone cell replication.
  • QoS  and replication reliability: Replication in WebSphere ND is best effort, which implies that consistency and changes cannot be guaranteed. WXS offers a reliable replication mechanism.
  • Figure 3A: WXS enabled grid for session persistence. Here WXS Grid JVMs are Isolated from Application JVMs

    Figure 3B: WXS co-located HTTP session persistence. Here Application and Grid are co-located in the selfsame JVM.

    WebSphere eXtreme Scale provides non-invasive integration for HTTP session management, so that the application does not fill to be changed. It does this in 2 ways:

    a. HTTP servlet filter, a criterion fraction of the servlet specification.

    As shown in figure , the HTTP servlet filter intercepts every request, prior to forwarding the request to servlet or JSP. The servlet filter wraps the HTTPServletRequest and HTTPServletResponse objects that the application developer uses to access the request's session state. The eXtreme Scale HTTPSession kick overrides the kick normally provided by the default session manager. There is therefore no data duplication between the two session managers, and eXtreme scale provided session manager overrides the WebSphere session manager. The filter ensures that the session data is synchronized with the grid. On each request, if HTTP session attributes fill changed, they will be written back into the grid. The WXS enabled HTTP filter presents a option of storing the sessions in the selfsame JVMs as the servlet containers (collocated) or in a divide grid tier of remote JVMs. Each of these options fill their merits and demerits, and should one of the infrastructure design considerations.

    The synchronous interaction of the filter and the grid, is likewise an well-known design consideration. The synchronous interaction between filter and grid ensures that any change to the http session is immediately replicated to the grid. While this may be a desirable option in some cases, it does fill a performance impact. WXS allows a configuration (in splicer.properties file)  for this interaction to be asynchronous, where the changes are buffered and flushed to the grid, at defined intervals. It is to be notable that this Syncronous/Asynchronos replication between the filter and the grid, while similar in concept, is entirely different from the replication mechanism configured between the grid servers.

    The following steps exigency to be performed in order to employ HTTP servlet filer with WXS:

    1.                Create the following files and Package it with WAR (Web) Module in the META-INF directory.

    -          objectGrid.xml :This contains the definition of the grid itself; the maps, locking behavior, plug-ins, etc.

    -          objectGridDeployment.xml : This contains a description of the grid's deployment; how many partitions, zones, replication strategy etc.

    -          splicer.properties: This file provides the values used by the addObjectGridFilter script to splice the web module. This is one of the required input parameters for the script that splices the web module with filter declarations. This file contains servlet context initialization parameters such as catalog server host and port, affinity, persistence mechanism, replication kind & interval etc. It is to be notable that while this file is not required artifact in the WAR (Web) Module, and only the above mentioned xml files are required, including this file is more for information only.

    2.                evade the addObjectGridFilter script on the WAR to add the filter to the web.xml file. The addObjectGridFilter script is usually located :

    <WXS_HOME>/session/bin/addObjectGridFilter.bat/.sh

    Usage : addSessionObjectGridFilter <location of  war/ear file> <location of properties file>

    Example: addSessionObjectGridFilter MyWebModule.war splicer.properties

    3.                When using WXS in a WebSphere ND managed environment, the managed nodes would exigency to be augmented with WXS (a.k.a XD-DG), and fulfill step 1 and 2, and deploy the Web Module or WAR to WXS augmented cluster.

    b. employ of  ObjectGrid client server Topology for embedded applications

    This is a  variation of the above techniques, in which the application  is the client to the WXS grid.

    I.      Collocating the application with the grid (i.e. selfsame ‘runtime' JVM): This is when the ObjectGrid servers are collocated in the selfsame processes where the servlets run. The WXS session manager can communicate directly to the local ObjectGrid instance, since it is collocated with in the selfsame server process.

    When WebSphere Application Server as runtime and grid container, simply dwelling the supplied objectGrid.xml and objectGridDeployment.xml files into the META-INF directories of your WAR files. ObjectGrid will automatically detect the presence of these files when the application starts and will then automatically launch the ObjectGrid containers in the selfsame process as the session manager. You can modify the objectGridDeployment.xml depending on which kind of replication (synchronous or asynchronous) and how many replicas you want configured. This step assumes that your fill augmented the application server profile/instance with WXS.

    II. Isolating the application from the grid (i.e. application and grid in divide JVMs): Unlike the topology discussed above the server process hosting the application is different from the server process hosting the JVMs. This is advantageous for the application with either voluminous HTTP session traffic or relatively larger http session objects.  In this case the WXS session manager, which resides on the application server process, communicates to a remote ObjectGrid server processes. In sequel the WXS session manager becomes the client, to the kick grid servers, which are the hosts to grid containers.

    To employ a remote, ObjectGrid, the WXS session manager must be configured to communicate with the catalog servers and grid servers. The session manager will then employ an ObjectGrid client connection to communicate to the catalog server and the ObjectGrid servers, wherever they reside. If the ObjectGrid servers are to be started in independent, standalone J2SE processes, then it is advisable to launch the ObjectGrid containers using the objectGridStandAlone.xml and objectGridDeploymentStandAlone.xml files supplied in the session manager samples directory.  This differentiation is to witness that the HTTP session store is standalone and isolated. The core functionality of the file remains, i.e. fondness objectGrid.xml, objectGridStandalone.xml  defines the grid for sessions, and objectGridDeploymentStandalone.xml  defines the mechanics of grid deployment.

  • Zone support
  • With WXS Zone based replication, WXS allows for rules-based data placement, enabling elevated availability of the grid due to redundant placement of data across physical locations. This notion is particularly appealing to enterprise environments that exigency data replication and availability across geographically dispersed data centers.

    WebSphere eXtreme Scale introduced zone-based back introduced in V6.1.0.3. Zone back provides much needed control of shard placement in the grid. Zone back allows for rules-based shard placement, enabling elevated availability of the grid due to redundant placement of shards across physical locations. This notion is particularly appealing to enterprise environments that exigency data replication and availability across geographically dispersed data centers. In the past these enterprise computing environments were limited due to the performance constraints imposed by networks and real time data replication requirements. With the inclusion of Zone support, WebSphere eXtreme Scale offers better scalability by decoupling the grid environment. With Zone support, only the metadata shared by the catalog servers is synchronously replicated,

    While the data objects are copied asynchronously across networks. This not only enables better location awareness and access of objects, but likewise imposes fewer burdens on enterprise networks, by eliminating the requirement of real time replication.

    As long as catalog servers espy zones being registered (as the zoned grid server Come alive), the primary and replica shards are striped across zones. Further, the zone rules described in the objectGridDeployment.xml file, will dictate placement of sync or async replica shards in respective zones.

    As a universal practice, it is recommended that you dwelling only sync replicas in selfsame zone and async replicas in a different zone for optimal replication performance. This placement likewise would be optimal for scaling across geographies or data centers.

    Since core groups execute not span zones, the catalog server(s) are placed one or two per data seat or zones, and the catalog servers synchronize their object/shard routing information. A catalog service must be clustered for elevated availability in every zone. The catalog servers retain topology information of flawless of the containers in the ObjectGrid and controls balancing and routing for flawless clients. Since catalog servers play a vital role in maintaining the catalog service and client routing, it is well-known to understand the concept of a catalog service quorum. A catalog service quorum is the minimum number of active catalog server members required for the grid system to operate correctly (i.e to accept membership registrations and changes to membership to ensure proper routing and shard placement).

    <zoneMetadata> <shardMapping shard="P" zoneRuleRef="stripeZone"/> <shardMapping shard="S" zoneRuleRef="stripeZone"/> <zoneRule designation ="stripeZone" exclusivePlacement="true" > <zone name="ZoneA" /> <zone name="ZoneB" /> <zone name="ZoneC" /> </zoneRule> </zoneMetadata>

    Figure 4: Zone meta data from ObjectGridDeployment.xml file, showing lone ZoneRule ‘StripeZone' i.e if primary is placed in Zone A, the secondary will be placed in either ZoneB or ZoneC, but not both.

    This approach of ensuring the registration and consistency of grid servers is achieved only when a quorum is established between catalog servers. Writes to

    the catalog service state are committed only when the majority of the catalog

    servers participate in the transaction. Containers that are changing states cannot

    receive any commands, unless the catalog service transaction commits first. If

    the catalog service is hosted in a minority partition, i.e no quorum established, it

    then accepts liveness messages. The catalog servers cannot, however, accept

    server registrations or membership changes, because the state is essentially frozen, until the catalog service quorum is re-established.

    Figure 5: Two geographically disperse Zones to store HTTP sessions across 2 data centers. gratify note that the Catalog Servers are hosted in divide JVMs from Grid containers, and ONLY the Catalog severs are grouped in divide core group. This is done as Zones execute not span core groups.

  • Conclusion
  • One of the main design concerns of an application and application infrastructure is the session persistence and handling of session state beyond the life of application servers/JVMs. The traditional persistence mechanisms fill imposed performance and scalability concerns with growth in business and subsequent requirements. Growth in business usually results in increase traffic, user session and proportional storage requirements.  Historically IT organizations fill attempted to battle this problem with innovative and knotty solutions such as employing various caching layers at the edge for static content, and a divide cache for dynamic content, or by selectively preserving some HTTP Session data and recreating the others. Such strategies while efficient in some application environment, fill reached maturity flush of its growth spectrum. Increasingly knotty and de-fragmented application frameworks fill compelled the introduction on ‘in-memory data grid' to provide a scalable solution to address the growth of session storage - both in terms of size and volume. The introduction of an in recollection grid relieves the constant battle with scalability and provides an isolated layer, whose sole purpose is to store HTTP Session (or any java) objects.

    WXS technology enables ‘in-memory data grid' which is essentially a grid of interconnect JVMs, acting as a lone cohesive unit, much fondness a database, without the management and performance overheads. Using WXS for HTTP session persistence is a very non-invasive change to application architecture, as seen in figure 3, a servlet filer is introduced in the application intercepting requests and connecting to the grid, without any significant change to the application architecture. The WXS enabled grid is policy driven; self managed and can easily absorb growth by inclusion of additional JVMs to the existing grid. WXS thus makes a compelling consideration for HTTP session persistence in the environments that is plagued with performance and scalability woes due to growth in business application traffic. WXS not only addresses the fundamental session storage concerns, but add to the capability of storing session across geographically disperse data centers, independent of WebSphere infrastructure's cell  based management boundaries. This capability alone, arms organization with the faculty to persist and wield session state across data centers. Such a capability was neither recommended nor technically feasible with existing technologies and solutions.  WXS' Zone back thus becomes a distinguishing feature, which sets WXS apart from many competing caching technologies.

    References:

    1.      User's steer to WebSphere eXtreme Scale - http://www.redbooks.ibm.com/abstracts/sg247683.html

    2.      Brown et al - Improving HTTP session performance with smart serialization http://www.ibm.com/developerworks/websphere/library/bestpractices/httpsession_performance_serialization.html

    3.      WebSphere Extreme Scale WiKi - http://www.ibm.com/developerworks/wikis/display/objectgrid/Getting+started

    4.      Billy Newport's Blog -

    http://www.devwebsphere.com/

    5.      http://www.ibm.com/developerworks/websphere/library/techarticles/0905_gaur/0905_gaur.html

    Acknowledgements:

    I want to thank Joshua T Dettinger and Billy Newport for his serve in technical content and editing of this paper.


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    Enterprise Manager Grid Control 10g Release 4 (10.2.0.4) includes many modern features that add to your faculty to monitor and manage your enterprise:

    Grid Management Features

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  • Adaptive Alert Thresholds: Computes statistical alert thresholds using either static (user-defined) or dynamic (self-adjusting) baselines. Dynamic statistical baselines can significantly help the accuracy of performance alerting, while reducing exposure to the "false positives" commonly incurred under fixed threshold schemes.

  • Application Server Management Features

  • Extended Middle Tier Management: Allows administrators to determine OracleAS Farms, OracleAS Clusters, Oracle HTTP Server elevated Availability Groups and OC4J elevated Availability Groups as composite targets and fulfill management and administration operations on them. likewise supports discovery, management, and administration of Oracle BPEL Process Manager targets and Oracle BPEL Processes. Allows creation of infrastructure services and aggregate services. likewise allows viewing of ally links associated with a BPEL process and adding of SOAP tests for them to test their availability.

  • BPEL Process Provisioning Deployment Procedure: Supports deployment of BPEL processes on selected BPEL Process Managers. The BPEL process suitcase files are placed as generic components in the software library, and once it is available for deployment, the deployment procedure can be evade to deploy the processes on BPEL Process Managers.

  • Oracle BI Suite Enterprise Edition Management: Supports discovery, management, and administration of Oracle BI Suite Enterprise Edition components, mainly Oracle BI Presentation Server, Oracle BI Cluster Controller. Oracle BI Analytics Server, and Oracle BI Scheduler. likewise supports discovery and monitoring of Data warehouse Application Console Server (DAC Server), which is used to create and schedule ETL task flows for Informatica server.

  • Log File Rotation Jobs: Supports scheduled rotation of log files of OracleAS components to a default or user-defined location. Allows adding of a log rotation job as fraction of a multi-task job and saving of this job to the library.

  • MQ sequence Support: Supports discovery and monitoring of IBM WebSphere MQ Queue Managers and IBM WebSphere MQ Clusters. likewise allows monitoring of their logical objects such as Queues and Channels.

  • JBoss Application Server Management: Supports discovery, management, and administration of JBoss Application Servers and JBoss Partitions. likewise allows refreshing of JBoss Partition membership to reflect the current deployment state.

  • Microsoft Exchange Server Management: Supports discovery, management, and administration of Microsoft Exchange Organizations, Microsoft Exchange Routing Groups, and Microsoft Exchange Servers.

  • Automatic Creation of System and Services: Supports automatic creation of a system and service from a J2EE or Web application after checking for dependencies. Allows creation of a service with a modern or existing system based on the dependency mapping available. likewise allows update of an existing service and system.

  • Configuration Management: Extended configuration management back for OracleAS deployments. Collect, search, track, compare, and report on flawless OracleAS hardware and software installation configurations. Maintain a central inventory of software configuration data of core components for flawless OracleAS instances. likewise provides this back for BEA WebLogic Managed Server, Apache HTTP Server, and IBM Websphere Application Server deployments.

    As fraction of the configuration management tasks, you can likewise view the BPEL Processes, its different versions, and the suitcase files associated with each version. You can likewise compare the BPEL Process suitcase files of different versions and track the changes that were made to a version. This allows you to track changes and identify the cause for changed deportment of the BPEL Process.

  • Topology Views: Provides graphical topology view of AS Farms, Clusters, and ASs, with current status, alerts and policy violations, and performance metrics. View by host, by request routing overview, or request routing details.

  • Custom Aggregate Monitoring: Define monitoring criteria for OracleAS Farms and Clusters using customizable aggregate metrics based on the statistical aggregation of individual metrics of cluster members. View aggregate metrics as an overlay of Òtop best,Ó Òtop worst,Ó or Òpeak thresholdÓ values for individual metrics.

  • J2EE Application Monitoring: Hierarchical J2EE application view at the OracleAS cluster flush shows performance across the OC4J instances on which it is deployed. faculty to plug customer application JMX MBeans into Grid Control.

  • Backup and Restore: Supports complete and incremental online backup of middle tier installations. Automatically regain instances to the eventual complete backup, then apply incremental backups.

  • OPMN Jobs: Supports immediate or scheduled complete process control (start, stop, restart) of OPMN managed components from Grid Control.

  • Provisioning "Gold" Images: deliver criterion reference images of application server targets to the central Software Library and deploy to target locations. Standardize the deployments of the application server targets in your enterprise. Create and extend OracleAS Cluster environments by creating modern clusters or adding nodes to existing clusters.

  • Cloning: Extended cloning back for different types of middle-tier installations, including WebCache, J2EE and WebCache, Portal and Wireless, Forms and Reports Services, and business Intelligence and Forms.

  • Collaboration Suite Management Features

  • Centralized Management: lone target subtab for Collaboration Suite from which you can view your Collaboration Suite deployment(s) and navigate to specific components.

  • Automatic Discovery: Collaboration Suite server targets, such as SMTP servers and Calendar servers, are automatically discovered and monitored in Grid Control.

  • Service Monitoring: In addition to monitoring server components, Grid Control likewise monitors Collaboration Suite services from the end-user perspective.

  • Custom Service Modeling: rapidly setup of services using a simple customization user interface.

  • Topology Viewer: Service topology view of your Collaboration Suite deployment showing relationships between different services in Collaboration Suite.

  • Root cause Analysis: Detects the potential root causes of any service outage.

  • Dashboards: Services Dashboard for monitoring service availability, performance, usage, and service-level compliance. System Dashboard for monitoring exceptions in your Collaboration Suite system.

  • Client System Analyzer: Collects Windows client data and checks for minimum Collaboration Suite requirements.

  • Broader System Coverage

  • Host Management: Out-of-box operating system, hardware, and software monitoring of the hosts on which your applications and services reside. Increased coverage for hardware monitoring, process and file-level monitoring, remote command shells, and remote file editing.

  • Linux Host Administration: Host administration features for RedHat and SuSE Linux provide you the faculty to administer the most well-known host functions easily. Using the centralized console, it is faster and less oversight recumbent to set up a server or troubleshoot problems. Operators with the commandeer privileges can set up and administer System Services, for example, start and quit individual services, and Network Setup, for example, NFS client configuration.

  • Enterprise Storage Reports: Reports on allocation, utilization, roll-ups by location, line of business, application, and vendor.

  • Support for Network Devices and Storage: Monitor network and storage devices, such as F5 Server Load Balancers and NetApp Filer network storage.

  • Support for Non-Oracle Middleware: back for discovery, performance monitoring, reporting, alerts, process control, and synthetic transactions for third-party application servers and application server clusters, such as IBM WebSphere and BEA WebLogic.

  • External Product Integration: Integrate external products using command line interface, notifications, and bi-directional messages.

  • E-Business Suite Management: Plug-in available to enable Grid Control to manage the Oracle Applications Manager, fraction of the E-Business Suite.

  • New Management Packs, Plug-ins, and Connectors

    In addition to the six management packs available in the previous release, Enterprise Manager 10.2 offers eight modern management options: five standalone management packs, five system monitoring plug-ins, and five management connectors.

    Oracle business intelligence Management Pack

    Oracle business Intelligence Management Pack is an integrated solution for ensuring the performance and availability of Oracle business Intelligence Enterprise Edition. Using the pack, you can execute the following:

  • Receive proactive alerts on impending problems on the application.

  • Examine run-time statistics to troubleshoot and tune performance.

  • Compare configurations across different environments.

  • Keep track of configuration changes.

  • Proactively enforce configuration policies to avoid configuration-related problems.

  • You can employ the pack with other Oracle Enterprise Manager management packs and plug-ins to achieve end-to-end management of the entire application environment, including both Oracle and non-Oracle databases, operating systems, storage, and network devices.

    Key product features include:

    Oracle Diagnostics Pack for Non-Oracle Middleware

    Oracle Enterprise Manager 10gR4 introduces the Diagnostics Pack for Non-Oracle Middleware. This pack contains the Oracle Application Diagnostics for Java (Oracle AD4J) (See the next section for more details about Oracle AD4J.) In addition to Oracle AD4J, this pack provides the following features:

  • Discovery of non-Oracle middleware (Web Logic, Web Sphere, and JBoss)

  • System monitoring of key performance, load, and usage metrics

  • Out-of-box thresholds, events, notifications, monitoring templates, and automated corrective actions

  • Real-time and historical monitoring

  • Oracle Application Server Diagnostics Pack — Oracle Application Diagnostics for Java

    Oracle Enterprise Manager 10gR4 Application Server Diagnostics Pack introduces Oracle Application Diagnostics for Java (Oracle AD4J). Oracle AD4J is a low overhead Java application monitoring and diagnostics solution that improves the availability and performance of Java applications. Highlights of the Oracle Application Server Diagnostics pack are as follows:

  • Easy to deploy and no server restarts are required.

  • Immediate visibility into the Java stack. No application instrumentation required provides in-depth, method-level visibility into flawless active transactions occurring in JVM.

  • Identifies the slowest requests, slowest methods, and the bottleneck resources, such as CPU, I/O, memory, gradual running or hanging threads and Database.

  • Detects the recollection leaks and allows administrators to fulfill recollection leak analysis in a production environment without stopping the application. Administrators can bewitch multiple mound snapshots over a age of time and compare them to find the Java objects leaking memory.

  • Allows tracing Java requests to the associated database sessions. It highlights the slowest SQL queries and helps administrators tune SQL and the database to help the performance application. It facilitates smooth communication between the database administrators and application administrators by isolating problems to the database or Java code.

  • Enhanced Management Pack for SOA

  • Configuration Management: Collects configuration information for the BPEL Process Manager server, domains, and processes. The Process Manager server and domain parameters can be refreshed, saved, or compared with another target. Different versions of the selfsame BPEL process can likewise be compared.

  • Deployment Automation: Automates the deployment of one or more BPEL suitcases to one or more BPEL targets. Scheduling capability is likewise provided.

  • Adapter Metrics: Throughput and oversight metrics for different adapters are provided in graphical format.

  • Support for BPEL: In addition to existing back for BPEL 10.1.3, back for BPEL 10.1.2 and 10.1.3.3 is likewise provided.

  • Enhanced Service flush Management Pack

    The Service flush Management Pack has added the following support:

    Enhanced Application Management Pack for Siebel

    Oracle Application Management Pack for Siebel is a complete and integrated solution for ensuring the performance and availability of Siebel applications. Using the pack, you can execute the following:

  • Receive proactive alerts on impending problems on the application.

  • Examine run-time statistics to troubleshoot and tune performance.

  • Compare configurations across different environments.

  • Keep track of configuration changes.

  • Proactively enforce configuration policies to avoid configuration-related problems.

  • Monitor and report on the service flush delivered by the application and performance diagnostics of user and server performance.

  • You can employ this pack with other Oracle Enterprise Manager management packs and plug-ins to achieve end-to-end management of the entire application environment, including both Oracle and non-Oracle databases, operating systems, storage, and network devices.

    The 10gR4 release of this pack adds integrated Siebel Transaction Diagnostic back using data captured through the Siebel Application Response Measurement (SARM) framework.With this tool, you can:

  • Analyze request processing for individual user requests.

  • Analyze CPU and recollection consumption of processing requests for different Siebel Server Components.

  • Graphically visualize SARM metric data

  • Compare performance profiles over time

  • Create performance reports and share them with your co-workers for collaborative performance diagnostics.

  • The 10gR4 version of this Siebel Transaction Diagnostic implement likewise adds back for Siebel 7.7 and 7.8 besides being compatible with Siebel 8.0. It is fully integrated with Oracle Enterprise Manager, which eliminates the exigency for divide installation and user maintenance, and it runs on flawless operating system platforms that Oracle Enterprise Manager supports.

    The older 10gR3 version of the standalone Siebel Diagnostic implement remains to be licensed exclusively as fraction of the Application Management Pack for Siebel. Oracle advises that customers migrate from this standalone implement to the integrated version in 10gR4 for better functionality, performance, reliability, and compatibility.

    The following tables compare various Enterprise Manager features used with the standalone Siebel Diagnostic implement for Enterprise Manager Grid Control 10gR3 and the integrated version built into Oracle Enterprise Manager Grid Control 10gR4.

    Deployment Standalone Siebel Diagnostic in 10gR3 Integrated Siebel Transaction Diagnostic in 10gR4 Installation Requires divide manual installation on each Siebel server machine and Oracle Enterprise Manager server. Fully integrated into Enterprise Manager; no divide installation is needed. Agent recollection requirement 80 MB or more. 40 MB or more. Transaction Diagnostic Standalone Siebel Diagnostic in 10gR3 Integrated Siebel Transaction Diagnostic in 10gR4 User interface Different from Enterprise Manager. Integrated user interface consistent with other Enterprise Manager tools. Enterprise user session analysis No Yes Request timing aggregation No Yes Performance profile comparison No Yes Transaction analysis persistence No Yes Dynamic SARM instrumentation enablement No Yes Security Standalone Siebel Diagnostic in 10gR3 Integrated Siebel Transaction Diagnostic in 10gR4 Authentication Requires divide login from Enterprise Manager. Integrated authentication through Enterprise Manager. User management Separate user setup and password maintenance is required. Integrated user management with Enterprise Manager. Role-based access control No Yes Siebel Compatibility Standalone Siebel Diagnostic in 10gR3 Integrated Siebel Transaction Diagnostic in 10gR4 Siebel 7.7 No Yes Siebel 7.8 No Yes Siebel 8.0 Yes Yes Future Siebel releases No Yes O/S Compatibility Standalone Siebel Diagnostic in 10gR3 Integrated Siebel Transaction Diagnostic in 10gR4 Microsoft Windows Server Yes Yes Solaris No Yes Linux No Yes HP/UX No Yes AIX No Yes Web Browser Compatibility Standalone Siebel Diagnostic in 10gR3 Integrated Siebel Transaction Diagnostic in 10gR4 Internet Explorer Yes Yes Firefox No Yes Safari No Yes Netscape Navigator No Yes Mozilla No Yes Licensing Standalone Siebel Diagnostic in 10gR3 Integrated Siebel Transaction Diagnostic in 10gR4 Mozilla Requires Application Management Pack for Siebel license Yes Yes

    SAP Monitoring Support

    Oracle Enterprise Manager Grid Control 10gR4 enables the monitoring of SAP R/3 applications along with other Oracle and non-Oracle technologies through a lone Oracle Enterprise Manager Grid Control console. It provides:

  • Centralized, multi-tier, multi-instance SAP R/3 monitoring.

  • Discovery of SAP R/3 servers and instances for each monitored SID.

  • Comprehensive, efficient, and secure health status data collection.

  • End-user tang monitoring for SAP R/3 application modules.

  • SAP R/3 business service dashboards and performance trend reports.

  • Note:

    Use of this capability requires the NimBus SAP Plug-in for Oracle Enterprise Manager 10g, available separately through NimSoft. employ of other Oracle Enterprise Manager capabilities may require additional licenses.

    It’s the mainframe’s turn to secure the services treatment | killexams.com real questions and Pass4sure dumps

    In-Depth

    It’s the mainframe’s turn to secure the services treatment
  • By Deborah Melewski
  • 10/30/2003
  • While the software industry focused on Java, .NET and Web services in recent years, the mainframe became an afterthought. It was expected to scramble away.

    But IT shops are now waking up to find that the mainframe soundless runs the key enterprise applications, and that the mainframe elbowroom is due for some “home improvement.”

    Application evolution managers are discovering that, when it comes to refashioning mainframe apps as Web services apps, there are many different ways to go. And as Gartner Inc.’s Dale Vecchio said, they may open up a Pandora’s box if the dig too deeply into that legacy code. Developers exigency to let more -- not fewer -- users into the mainframe world, and some will opt for host-to-Web, GUI extensions and screen-scrapers as the best means to start to bring the mainframe into the realm of Web services.

    When the Minnesota Dept. of Public Safety Driver and Vehicle Services (DVS) Division in St. Paul decided to integrate its legacy mainframe applications with Web services, the division chose to scramble with the Verastream Host Integrator product from WRQ Inc., Seattle.

    According to Judith Franklin, manager of enterprise technology back at DVS, the division’s goal was to help data character and accuracy, as well as turnaround time to business partners and the drivers of Minnesota. Challenges were plentiful. To initiate with, the system in employ was a largely paper-driven environment, based on a mainframe that was more than 25 years old.

    When Franklin was brought in, processing a motor vehicle title transfer took between three and six months. It was not uncommon for the processing of a driver’s license to bewitch up to six weeks. Most of the delay, she said, was caused by the amount of time it took for the paperwork to arrive at the DVS and be entered. In addition, there were a lot of data-entry errors.

    “Based on their business model, if you needed to secure a driver’s license or renewal, or register a vehicle or transfer a title, you had to scramble to their business partners who could be the cities, counties or private individuals in business for themselves,” said Franklin. “You would scramble there, execute your paperwork and they in turn would send us the paperwork. And there it would sit, a considerable pile of paperwork that would eventually trickle to the top where their data-entry people would then enter it.”

    The DVS system was running on an IBM S390 mainframe with Cincom’s proprietary Supra database, which was proving very expensive to maintain. “We needed to execute something dramatically different,” Franklin said.

    Franklin organize two or three Cobol programmers who knew the system inside and out. As is often the case with legacy systems, there was very minute documentation. The screens were typical CICS screens, and could not be released to business partners or to the public because they contained too much information and were difficult to read.

    Franklin’s first goal was to execute something efficient -- and in a relatively short timeframe -- that would allow the DVS to start publishing on the Web and provide a service-oriented approach for doing transactions and real-time data entry with business partners. It was not necessary to enhance the current system because the DVS planned to eventually scramble away from that database.

    “We required a implement with a minimal learning curve for Visual Basic programmers already on staff, rather than having to bring in Java programmers and build up expertise,” said Franklin. “We likewise wanted a implement flexible enough to fortunate into wherever they would be doing their core application evolution as they grew.”

    Using Verastream Host Integrator with Microsoft Visual Studio, and running on Microsoft IIS with ASP, the DVS went live with two Web sites for driver’s license applications in less than two months. One site was for the public, while the other was a private authenticated site for business partners.

    The DVS built Web apps that scramble to the Verastream middleware, which then goes to the mainframe and returns data with records that are deployed and formatted for readability. The DVS is likewise merging its Verastream model with a variety of SQL databases.

    A site for law enforcement was then added. “This has been a huge turnaround for the state,” said Franklin. “Our law-enforcement partners negate that the services they now provide are the best tools they’ve been given since the mobile radio.”

    Prior to Web services, law-enforcement officials had to spread out pages of papers; with the modern system, they can access a current, readable driver’s record. More than 10 million photos can be stored using the SQL database, and the records are integrated with the photos.

    The division has taken data entry out to flawless deputies and agents in the state, and has been doing real-time transactions for about a year. “This has allowed us to withstand budget issues that flawless states are going through, and it has increased the accuracy of their data,” said Franklin. “The DVS has saved some $260,000 in programming/legacy storage costs, and has prick license processing times by 75%.”

    But the change was not completely smooth, admitted Franklin. The DVS went from a batch-processing concept to one that suddenly opened up 24x7. There were likewise bandwidth problems when the DVS started getting more than 27,000 hits a day.

    “In many ways, their mainframe people weren’t prepared for the increase in production, CPU cycles and database calls, which more than doubled in the first three months after opening up their mainframe to the Web,” she said. “And they learned that it would flawless double again during the next three months.”

    Also a concern: maintenance. DVS people brought everything down for maintenance one Saturday morning. “It was a one-time job on a Saturday morning, and suddenly the motor vehicle site is down and my beeper is going off,” said Franklin, admitting to some shortsightedness. “The concept is so different now that you might unwittingly let things fondness that slip by.”

    Performance is key

    “People are finding that they exigency to scramble their applications to the Web to fulfill it easier for their customers and partners to execute business with them,” said Scott Rosenbloom, chief strategist at WRQ. “One of the challenges is that some 60%–70% of their information and business logic is stored on legacy systems.”

    Companies exigency to scramble quickly to the Web, so re-creating business logic and data on modern platforms is just not possible, he added. “They’re starting to step back and say, ‘We already fill that business logic and information. It’s reliable, and it’s been on the host maybe 15 or more years. Let’s find a artery to expose that to the Web to fulfill the creation of these modern applications quicker and give them higher functionality.’”

    WRQ’s Verastream product is a runtime server with design tools. It works with products fondness Microsoft Visual Studio .NET, BEA Workshop and IBM’s WebSphere. “We expose the information with Verastream, and that is used to build the actual application,” said Rosenbloom.

    The WRQ tools likewise back setting layers of granularity. Many approaches to integration in the past failed, notable Rosenbloom, because when people started using services fondness CORBA they did not change the artery they viewed the calls, even though they were going over a network where there is a lot more overhead and latency.

    “In Web services, you can fill this selfsame challenge -- if you just expose the existing API via Web services, you could fill very low-level, fine-grain calls going on. For example, if you’re updating a bailiwick or a record as opposed to sending an entire document complete of many records that you may want to submit flawless at once,” Rosenbloom explained.

    “It’s very well-known that you implement Web services with the right flush of granularity when you fulfill this Web service convene because there is a lot of overhead associated with this call,” he added. “You’re creating an XML document. You’re shipping it over a protocol fondness HTTP over the network, and there are a lot of different things going on; you want to ensure that when you fulfill that convene over the network, it will execute a lot of toil for you before it returns.”



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