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• apache tomcat loadbalancing clustering on ubuntu

  - by user740010

  i am facing a problem in clustering the tomcat with apache as a loadbalancer using mod_jk on ubuntu. i have install apache2 on my ubuntu 11.04 and i have downloaded tomcat7 created two copies and kept them at two different location. 1st one is at /home/net4u/vishal/test/tomcatA 2nd one is at /home/net4u/vishal/test1/tomcatB i have made following changes to server.xml file in /conf folder 1. <Server port="8205" shutdown="SHUTDOWN"> 2. <Connector port="8280" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> 3.<Connector port="8209" protocol="AJP/1.3" redirectPort="8443" /> <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcatB"> 4. <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> similarly i have modified other tomcat i.e tomcatA server.xml content of the server.xml is as follow: -- <!--The connectors can use a shared executor, you can define one or more named thread pools--> <!-- <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="150" minSpareThreads="4"/> --> <!-- A "Connector" represents an endpoint by which requests are received and responses are returned. Documentation at : Java HTTP Connector: /docs/config/http.html (blocking & non-blocking) Java AJP Connector: /docs/config/ajp.html APR (HTTP/AJP) Connector: /docs/apr.html Define a non-SSL HTTP/1.1 Connector on port 8080 --> <Connector port="8280" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> <!-- A "Connector" using the shared thread pool--> <!-- <Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> --> <!-- Define a SSL HTTP/1.1 Connector on port 8443 This connector uses the JSSE configuration, when using APR, the connector should be using the OpenSSL style configuration described in the APR documentation --> <!-- <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true" maxThreads="150" scheme="https" secure="true" clientAuth="false" sslProtocol="TLS" /> --> <!-- Define an AJP 1.3 Connector on port 8009 --> <Connector port="8109" protocol="AJP/1.3" redirectPort="8443" /> <!-- An Engine represents the entry point (within Catalina) that processes every request. The Engine implementation for Tomcat stand alone analyzes the HTTP headers included with the request, and passes them on to the appropriate Host (virtual host). Documentation at /docs/config/engine.html --> <!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1"> --> <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcatB"> <!--For clustering, please take a look at documentation at: /docs/cluster-howto.html (simple how to) /docs/config/cluster.html (reference documentation) --> <!-- uncomment for clustering--> <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> <!-- Use the LockOutRealm to prevent attempts to guess user passwords via a brute-force attack --> <Realm className="org.apache.catalina.realm.LockOutRealm"> <!-- This Realm uses the UserDatabase configured in the global JNDI resources under the key "UserDatabase". Any edits that are performed against this UserDatabase are immediately available for use by the Realm. --> <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/> </Realm> <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true"> <!-- SingleSignOn valve, share authentication between web applications Documentation at: /docs/config/valve.html --> <!-- <Valve className="org.apache.catalina.authenticator.SingleSignOn" /> --> <!-- Access log processes all example. Documentation at: /docs/config/valve.html Note: The pattern used is equivalent to using pattern="common" --> <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="localhost_access_log." suffix=".txt" pattern="%h %l %u %t &quot;%r&quot; %s %b" resolveHosts="false"/> </Host> </Engine> i have install libapache2-mod-jk step 1. i have Created jk.load file in /etc/apache2/mods-enabled/jk.load content is as follows: LoadModule jk_module /usr/lib/apache2/modules/mod_jk.so Create /etc/apache2/mods-enabled/jk.conf: JkWorkersFile /etc/apache2/workers.properties JkLogFile /var/log/apache2/jk.log JkMount /ecommerce/* worker1 JkMount /images/* worker1 JkMount /content/* worker1 step 2. Created workers.properties file in /etc/apache2/workers.properties content is as follows: workers.tomcat_home=/home/vishal/Desktop/test/tomcatA workers.java_home=/usr/lib/jvm/default-java ps=/ worker.list=tomcatA,tomcatB,loadbalancer   worker.tomcatA.port=8109 worker.tomcatA.host=localhost worker.tomcatA.type=ajp13 worker.tomcatA.lbfactor=1   worker.tomcatB.port=8209 worker.tomcatB.host=localhost worker.tomcatB.type=ajp13 worker.tomcatB.lbfactor=1 worker.loadbalancer.type=lb worker.loadbalancer.balanced_workers=tomcatA,tomcatB worker.loadbalancer.sticky_session=1 i tried the same thing on the windows machine it is working.

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• ArchBeat Link-o-Rama Top 20 for June 3-9, 2012

  - by Bob Rhubart

  The top twenty most popular links as shared via my social networks for the week of June 3-9, 2012. SOA Analysis within the Department of Defense Architecture Framework (DoDAF) 2.0 – Part II | Dawit Lessanu Driving from Business Architecture to Business Process Services | H. V. Ganesarethinam Book Review: Oracle Application Integration Architecture (AIA) Foundation Pack 11gR1: Essentials | Rajesh Raheja Oracle Enterprise Manager Ops Center 12c: Enterprise Controller High Availability (EC HA)| Anand Akela Integrating OBIEE 11g into Weblogic’s SAML SSO | Andre Correa Introducing Decision Tables in the SOA Suite 11g Business Rule component | Lucas Jellema EJB 3.1: Stateless Session Bean Deployed as .war, Dependency Injection, Asynchronous Methods | Frank Munz Educause Top-Ten IT Issues - the most change in a decade or more | Cole Clark Oracle VM RAC template - what it took | Wim Coekaerts WebCenter Content shared folders for clustering | Kyle Hatlestad CRUD Use Case Implementation and ADF Query Search | @AndrejusB Introducing Oracle Cloud | Larry Ellison Exalogic Webcast Series: Rethink Your Business Application Deployment Strategy BI Architecture Master Class for Partners - Oracle Architecture Unplugged Creating an Oracle Endeca Information Discovery 2.3 Application | Mark Rittman Eclipse DemoCamp - June 2012 - Redwood Shores, CA Oracle Cloud offering - What makes it unique? | Tom Laszewski Virtualization at Oracle - Six Part Series The right way to transform your business via the cloud | David Linthicum Protecting a WebCenter app with OAM 11g | Chris Johnson Thought for the Day "Programming without an overall architecture or design in mind is like exploring a cave with only a flashlight: You don't know where you've been, you don't know where you're going, and you don't know quite where you are." — Danny Thorpe Source: softwarequotes.com

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• Stability, x86 Vs Sparc

  - by Jason T

  Our project are plan to migrate from Sparc to x86, and our HA requirement is 99.99%, previous on Sparc, we assume the hardware stability would like, hardware failure every 4 month or even one year, and also we have test data for our application, then we have requirement for each unplanned recovery (fail over) to achieve 99.99% (52.6 minutes unplanned downtime per year). But since we are going to use Intel x86, it seems the hardware stability is not so good as Sparc, but we don't have the detail data. So compare with Sparc, how about the stability of the Intel x86, should we assume we have more unplanned downtime? If so, how many, double? Where I can find some more detail of this two type of hardware?

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• Az &eacute;rem m&aacute;sik oldala

  - by peter.nagy

  Az Exalogic kapcsán, ha már valaki hallott róla, akkor leginkább a teljesítmény ugrik be. Mint normálisan majdnem minden szerver megoldás új verziójánál. Nos ez nyilvánvalóan nincs másképp itt sem, amire büszkék is lehetünk. Ugyanakkor nagyon fontos tulajdonsága az Exalogicnak, hogy szinte azonnal hadrafogható. Ez persze már részben elérheto, mivel képesek vagyunk kész virtuális gépeket letölteni komplett telepítéssel. Persze ott még a vasra külön fel kell húzni a virtualizációs szoftvert. Na és itt jönnek a problémák. Bárki aki már látott, csinált, vagy végig nézte egy rendszerhez szükséges infrastruktúra felhúzását az tudja mirol beszélek. A telepítés, megfelelo verziók, szükséges patch-ek, hálózati eszközök bekötése. Aztán mindennek a konfigurálása. A legjobb esetben is napok, de inkább hetek kérdése mire üzemkész lenne. Az Exalogic esetében ez más, hiszen gyárilag összereszelték, a konfiguráció kialakítása gyakorlatilag néhány paraméter file és kész. De lássuk is, hogy mennyi ido onnan, hogy kibontottuk a dobozból. Mindössze egy nap. A hab a tortán pedig a full stack upgrade. Nem külön minden egyes komponenst. Firmware-tol a WebLogic szerverig.

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• Log Blog

  - by PointsToShare

  © 2011 By: Dov Trietsch. All rights reserved Logging – A log blog In a another blog (Missing Fields and Defaults) I spoke about not doing a blog about log files, but then I looked at it again and realized that this is a nice opportunity to show a simple yet powerful tool and also deal with static variables and functions in C#. My log had to be able to answer a few simple logging rules:   To log or not to log? That is the question – Always log! That is the answer  Do we share a log? Even when a file is opened with a minimal lock, it does not share well and performance greatly suffers. So sharing a log is not a good idea. Also, when sharing, it is harder to find your particular entries and you have to establish rules about retention. My recommendation – Do Not Share!  How verbose? Your log can be very verbose – a good thing when testing, very terse – a good thing in day-to-day runs, or somewhere in between. You must be the judge. In my Blog, I elect to always report a run with start and end times, and always report errors. I normally use 5 levels of logging: 4 – write all, 3 – write more, 2 – write some, 1 – write errors and timing, 0 – write none. The code sample below is more general than that. It uses the config file to set the max log level and each call to the log assigns a level to the call itself. If the level is above the .config highest level, the line will not be written. Programmers decide which log belongs to which level and thus we can set the .config differently for production and testing.  Where do I keep the log? If your career is important to you, discuss this with the boss and with the system admin. We keep logs in the L: drive of our server and make sure that we have a directory for each app that needs a log. When adding a new app, add a new directory. The default location for the log is also found in the .config file Print One or Many? There are two options here:   1.     Print many, Open but once once – you start the stream and close it only when the program ends. This is what you can do when you perform in “batch” mode like in a console app or a stsadm extension.The advantage to this is that starting a closing a stream is expensive and time consuming and because we use a unique file, keeping it open for a long time does not cause contention problems. 2.     Print one entry at a time or Open many – every time you write a line, you start the stream, write to it and close it. This work for event receivers, feature receivers, and web parts. Here scalability requires us to create objects on the fly and get rid of them as soon as possible.  A default value of the onceOrMany resides in the .config.  All of the above applies to any windows or web application, not just SharePoint.  So as usual, here is a routine that does it all, and a few simple functions that call it for a variety of purposes.   So without further ado, here is app.config  <?xml version="1.0" encoding="utf-8" ?> <configuration>     <configSections>         <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, ublicKeyToken=b77a5c561934e089" >         <section name="statics.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />         </sectionGroup>     </configSections>     <applicationSettings>         <statics.Properties.Settings>             <setting name="oneOrMany" serializeAs="String">                 <value>False</value>             </setting>             <setting name="logURI" serializeAs="String">                 <value>C:\staticLog.txt</value>             </setting>             <setting name="highestLevel" serializeAs="String">                 <value>2</value>             </setting>         </statics.Properties.Settings>     </applicationSettings> </configuration>   And now the code:  In order to persist the variables between calls and also to be able to persist (or not to persist) the log file itself, I created an EventLog class with static variables and functions. Static functions do not need an instance of the class in order to work. If you ever wondered why our Main function is static, the answer is that something needs to run before instantiation so that other objects may be instantiated, and this is what the “static” Main does. The various logging functions and variables are created as static because they do not need instantiation and as a fringe benefit they remain un-destroyed between calls. The Main function here is just used for testing. Note that it does not instantiate anything, just uses the log functions. This is possible because the functions are static. Also note that the function calls are of the form: Class.Function.  using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace statics {       class Program     {         static void Main(string[] args)         {             //write a single line             EventLog.LogEvents("ha ha", 3, "C:\\hahafile.txt", 4, true, false);             //this single line will not be written because the msgLevel is too high             EventLog.LogEvents("baba", 3, "C:\\babafile.txt", 2, true, false);             //The next 4 lines will be written in succession - no closing             EventLog.LogLine("blah blah", 1);             EventLog.LogLine("da da", 1);             EventLog.LogLine("ma ma", 1);             EventLog.LogLine("lah lah", 1);             EventLog.CloseLog(); // log will close             //now with specific functions             EventLog.LogSingleLine("one line", 1);             //this is just a test, the log is already closed             EventLog.CloseLog();         }     }     public class EventLog     {         public static string logURI = Properties.Settings.Default.logURI;         public static bool isOneLine = Properties.Settings.Default.oneOrMany;         public static bool isOpen = false;         public static int highestLevel = Properties.Settings.Default.highestLevel;         public static StreamWriter sw;         /// <summary>         /// the program will "print" the msg into the log         /// unless msgLevel is > msgLimit         /// onceOrMany is true when once - the program will open the log         /// print the msg and close the log. False when many the program will         /// keep the log open until close = true         /// normally all the arguments will come from the app.config         /// called by many overloads of logLine         /// </summary>         /// <param name="msg"></param>         /// <param name="msgLevel"></param>         /// <param name="logFileName"></param>         /// <param name="msgLimit"></param>         /// <param name="onceOrMany"></param>         /// <param name="close"></param>         public static void LogEvents(string msg, int msgLevel, string logFileName, int msgLimit, bool oneOrMany, bool close)         {             //to print or not to print             if (msgLevel <= msgLimit)             {                 //open the file. from the argument (logFileName) or from the config (logURI)                 if (!isOpen)                 {                     string logFile = logFileName;                     if (logFileName == "")                     {                         logFile = logURI;                     }                     sw = new StreamWriter(logFile, true);                     sw.WriteLine("Started At: " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));                     isOpen = true;                 }                 //print                 sw.WriteLine(msg);             }             //close when instructed             if (close || oneOrMany)             {                 if (isOpen)                 {                     sw.WriteLine("Ended At: " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));                     sw.Close();                     isOpen = false;                 }             }         }           /// <summary>         /// The simplest, just msg and level         /// </summary>         /// <param name="msg"></param>         /// <param name="msgLevel"></param>         public static void LogLine(string msg, int msgLevel)         {             //use the given msg and msgLevel and all others are defaults             LogEvents(msg, msgLevel, "", highestLevel, isOneLine, false);         }                 /// <summary>         /// one line at a time - open print close         /// </summary>         /// <param name="msg"></param>         /// <param name="msgLevel"></param>         public static void LogSingleLine(string msg, int msgLevel)         {             LogEvents(msg, msgLevel, "", highestLevel, true, true);         }           /// <summary>         /// used to close. high level, low limit, once and close are set         /// </summary>         /// <param name="close"></param>         public static void CloseLog()         {             LogEvents("", 15, "", 1, true, true);         }           }     }   }   That’s all folks!

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• Descubre en una mañana todo lo que Oracle puede hacer por ti

  - by Noelia Gomez

  v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} En la actualidad, la tecnología está cambiando el mundo de una forma sin precedentes. La convergencia de novedades como la informática en la nube, los dispositivos móviles, las redes sociales, el Big Data y el «Internet de las cosas» está impulsando la innovación y revolucionando los antiguos modelos de negocio. ¿Cómo lograrán las empresas adaptarse a los cambios con rapidez sin poner en peligro el funcionamiento de la actividad comercial? Oracle siempre se ha puesto este reto y por ello queremos presentar en exclusiva para nuestros clientes las mayores novedades de nuestra gama de soluciones, el próximo 5 de Noviembre en el Oracle Day. En la parte de aplicaciones hablaremos de la oportunidad significativa de conseguir una posición de liderazgo en CX, ya que ofrecer una experiencia excelente está directamente vinculado con un aumento de las ventas. Cuanto más relevante y constante sea la experiencia de sus clientes, más probable es que compren. Disfrute de una experiencia única en este evento interactivo, donde podrá participar en debates con directivos de Oracle, ver vídeos y conocer experiencias de clientes, ampliar su red de contactos, asistir a demostraciones prácticas de productos, y un largo etcétera. Para más información acceda aquí. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-family:"Calibri","sans-serif"; mso-ascii- mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi- mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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• What's a nice explanation for pointers?

  - by Macneil

  In your own studies (on your own, or for a class) did you have an "ah ha" moment when you finally, really understood pointers? Do you have an explanation you use for beginner programmers that seems particularly effective? For example, when beginners first encounter pointers in C, they might just add &s and *s until it compiles (as I myself once did). Maybe it was a picture, or a really well motivated example, that made pointers "click" for you or your student. What was it, and what did you try before that didn't seem to work? Were any topics prerequisites (e.g. structs, or arrays)? In other words, what was necessary to understand the meaning of &s and *, when you could use them with confidence? Learning the syntax and terminology or the use cases isn't enough, at some point the idea needs to be internalized. Update: I really like the answers so far; please keep them coming. There are a lot of great perspectives here, but I think many are good explanations/slogans for ourselves after we've internalized the concept. I'm looking for the detailed contexts and circumstances when it dawned on you. For example: I only somewhat understood pointers syntactically in C. I heard two of my friends explaining pointers to another friend, who asked why a struct was passed with a pointer. The first friend talked about how it needed to be referenced and modified, but it was just a short comment from the other friend where it hit me: "It's also more efficient." Passing 4 bytes instead of 16 bytes was the final conceptual shift I needed.

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• Using WebSphere CloudBurst with PowerVM to AIX virtualization over a cloud

  - by ADD Geek

  hi there we are studying the virtualization option to reduce our datacenter cost, and this research was assigned to me. we looked into alternatives and we almost reached a conclusion that PowerVM is the only option to virtualize pSeries servers. we found no signs of cloud support explicitly mentioned in any document, however there was the mention of CloudBurst. from the videos we watched and the documents we read, it seems that CloudBurst is more oriented towards Application Servers (WebSphere Software). but our environment is not relying only on WebSphere. we have some banking applications, Oracle Databases and MQ/Broaker. the question is: 1- can we virtualize the existing applications (all running AIX) on a cloud running on top of some of the existing servers? (given that we do the sizing properly) 2- is PowerVM to run on top of CloudBurst? 3- if the above solution is applicable, is this some sort of HA solution (since the VM will run on top of multiple physical boxes, while the same physical box will run multiple live images) thanks for your help

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• LUNS access issue in ESX4 Cluster server

  - by rmustafa

  HI, I've created volumes in equallogic in PS 6000 XV(having 2 member which is in 1 pool), checked & those volumes can be easily detected my ISCSI software in windows. But the problem with ESX , not able to see the assigned disk on ESX server, I can explain what I've done: 1.Created Cluster with enabled HA & DRS 2.Added 3 ESX4 HOST 3.Added VMkernel & configured in all 3 ESX4, enabled vmotion & FT on the same adapter. 4.went to iSCSI storage adapter properties, enabled iSCSI 5.Trying to discover the available storage with the controller IP on dynamic discovery, but not able to see the assigned storage Note: the same volume is accessed to windows that means there is no issue from storage , am I right ???? Note: I wanted to mount the same volume in all 3 ESX host. Please suggest .... Thanks & Regards, Rashid Mustafa

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• Membership Provider Parte 1

  - by Jason Ulloa

  Asp.net ha sido una de las tecnologías creadas por Microsoft de mas rápido crecimiento por la facilidad para los desarrolladores de crear sitios web. Una de las partes de mayor importancia que tiene asp.net es el contar con el Membership Provider o proveedor de Membrecía, que permite la creación, manejo y mantenimiento de un sistema completo de control y autenticación de usuarios. Para dar inicio a la serie de post que escribiré sobre que es Membeship y cuáles son las funcionalidades principales daremos unas definiciones. Tal como se menciono anteriormente con el membership provider podemos crear un sistema de control de usuarios completos, entre las funcionalidades principales podemos encontrar: * Creación de usuarios * Almacenamiento de información en base de datos * Autenticación, bloqueos y seguimiento Otras de las ventajas que cabe resaltar, es que, algunos de los controles de asp.net ya traen "naturalmente" en sus funciones la implementación del membership provider, tal como el control "Login" o los controles de estado de usuario, lo cual nos permite que con solo arrastrarlos al diseñador estén funcionando. Membership provider es poderoso, pero su funcionalidad y seguridad se ven aumentadas cuando se integra con otros proveedores de asp.net como lo son RoleProvider y Profile Provider (estos los discutiremos en otros post). En la siguiente figura, podemos ver como se distribuyen algunoS provider creados por Microsoft Antes de iniciar con la implementación de membership debes conocer cosas básicas como el espacio de nombres al que pertenece, el cual es: System.Web.Security que se encuentra dentro del ensamblado System.Web. Algo que debe tomarse en cuenta, es que, para poder utilizar cualquiera de los miembros de la clase, debemos hacer la referencia respectiva. Por defecto, el membership provider está diseñado para trabajar directamente con SQL Server, de ahí que su nombre completo seria SQL Membership Provider. Sin embargo, debido a su gran flexibilidad podemos extenderlo a cualquier base de datos o bien modificarlo para adapatarlo a nuestras necesidades. En los siguientes posts, discutiremos como crear un proveedor personalizado utilizando Entity Framework, separando las capas de acceso y datos y cuáles son las principales funciones que podemos aplicar. En palabras básicas y sin entrar muy hondo en el tema, hemos descrito el objetivo del Membership Provider, para todos los que desean ampliar pueden hacerlo en: http://msdn.microsoft.com/es-es/library/system.web.security.membership%28v=vs.100%29.aspx

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• invite: WEBLOGIC 12c HANDS-ON WORKSHOP IN PARIS

  - by mseika

  Oracle WebLogic 12c InnovationWorkshopApril 24-26, 2012: Colombes, France Workshop Description Oracle Fusion Middleware is the #1 application infrastructure foundation and WebLogic Server is the #1 Application Server across conventional and cloud environments. It enables enterprises to create and run agile and intelligent business applications and maximize IT efficiency by exploiting modern hardware and software architectures. Do you want to learn more about innovative features, capabilities and roadmap of WebLogic Server 12c? Then this technical hands-on workshop is for you. Agenda Outline WebLogic introduction WebLogic Topology WebLogic Clustering and High Availibility Coherence Troubleshooting Entreprise Messaging Development Tools & Productivity Performance Exalogic Introduction Entreprise Manager Grid Control Oracle Public Cloud Oracle Traffic Director Lab Outline WebLogic Installation & Configuration WebLogic Clustering & HA Coherence Use Cases & Monitoring WebLogic Active GridLink for RAC Integration Messaging: JMS Audience WebLogic Consultants & Architects Prerequisites Basic knowledge in Java and JavaEE Understanding the Application Server concept Basic knowledge in older releases of WebLogic Server would be beneficial Equipment Requirements This workshop requires attendees to provide their own laptops for this class. Attendee laptops must meet the following minimum hardware/software requirements: Minimum 4GB RAM, 30GB free disk space Internet Explorer 7 or Firefox 3 or higher Download and install Oracle VM VirtualBox 4.1.8 AgendaThis workshop is 3 days. 8:30 am Sign-In and technical set up9:00 am: Workshop starts5:00 pm: Workshop ends This workshop is Free but space is limited. Register now!Register Here!

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• How can I calculate a vertex normal for a hard edge?

  - by K.G.

  Here is a picture of a lovely polygon: Circled is a vertex, and numbered are its adjacent faces. I have calculated the normals of those faces as such (not yet normalized, 0-indexed): Vertex 1 normal 0: 0.000000 0.000000 -0.250000 Vertex 1 normal 1: 0.000000 0.000000 -0.250000 Vertex 1 normal 2: -0.250000 0.000000 0.000000 Vertex 1 normal 3: -0.250000 0.000000 0.000000 Vertex 1 normal 4: 0.250000 0.000000 0.000000 What I'm wondering is, how can I determine, taken as given that I want this vertex to represent a hard edge, whether its normal should be the normal of 1/2 or 3/4? My plan after I glanced at the sketch I used to put this together was "Ha! I'll just use whichever two faces have the same normal!" and now I see that there are two sets of two faces for which this is true. Is there a rule I can apply based on the face winding, angle of the adjacent edges, moon phase, coin flip, to consistently choose a normal direction for this box? For the record, all of the other polygons I plan to use will have their normals dictated in Maya, but after encountering this problem, it made me really curious.

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• Shared FC LVM VG with LVs for each KVM VM. Clvm required?

  - by Cocoabean

  I have 2 virtual machine hosts running Ubuntu 12.04 and KVM managed with libvirt. They are both connected to the same VG which is a LUN on my SAN over FC. I provision LVs on this shared VG for each VM. I don't think I need HA or failover, but I do want live migration between the hosts. Do I need clvm in this case? As long as I don't try to start the same VM on each host should this work? Clvm requires lots of overhead with clustering tools that I don't think I need. I can deal with manually restarting VMs on other hosts in the event of a hardware failure.

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• HPC Cluster planning workflow?

  - by Veronica

  After three days of intensive Google searching, I have not found any high-level workflow of how to build a low profile - cheap - computing cluster (we are not interested in HA yet). This is just a front-end plus a node for now. We want to start small with rockscluster, provide a web-based server for offering services, and then add nodes as our budget increases. We're small company, so we haven't enough human resources to implement it smoothly. Here are some facts about our environment: Our hardware is not constant (we will add nodes). Our workload will vary (in the order from 200Mb - 1Tb) Our software will change (scientific applications for data mining) Do you know any visual workflow, worksheet, chart, describing the general necessary steps to begin our cluster planning?

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• Juniper J4350 out of order

  - by Benjamin Baron

  I have got two (2) Juniper routers J4350 that are out of order : All the interfaces are down (leds on the interfaces don't ligthen, ping dosen't respond) No output on the console port (even when booting) I've tried to reset the router (holding the RESET CONFIG button on the front panel during 15 seconds) and nothing happened, even while booting the device I've opened the router to check the fans. I've removed some dust and nothing has changed. I wanted to precise that the leds on the front panel are all on: The POWER led is green The STATUS led is red The ALARM led is on and is orange The HA (High Availablity) is on and orange as well I have found nothing on the Internet to solve this problem... Thank you for helping me :)

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• Today's Links (6/28/2011)

  - by Bob Rhubart

  Connecting People, Processes, and Content: An Online Event | Brian Dirking Dirking shares information on an Oracle Online Forum coming up on July 19. Social Relationships don't count until they count | Steve Jones "It's actually the interactions that matter to back up the social experience rather than the existence of a social link," says Jones. ORACLENERD: KScope 11: Cary Millsap Commenting on Cary Millsap's KScope presentation on Agile, Oracle ACE Chet Justice says, "I fight with methodology on a daily basis, mostly resulting in me hitting my head against the closest wall." The Sage Kings of Antiquity | Richard Veryard "Given that the empirical evidence for enterprise architecture is fairly weak, anecdotal and inconclusive, we are still more dependent than we might like on the authority of experts," says Veryard, "whether this be semi-anonymous committees (such as TOGAF) or famous consultants (such as Zachman)." Oracle Business Intelligence Blog: New BI Mobile Demos "These are short videos that showcase some of the capabilities in our mobile app," says Abhinav Agarwal. "One focuses on the Oracle BI platform, while the other showcases what is possible with the mobile app accessing Oracle Business Intelligence Applications, like Financial Analytics." MySQL HA Events in the UK, Germany & France | Oracle's MySQL Blog Oracle is running MySQL High Availability breakfast seminars in London (June 29), Düsseldorf (July 13) and Paris (September 7). "During these free seminars, we will review the various options and technologies at your disposal to implement highly available and highly scalable MySQL infrastructures, as well as best practices in terms of architectures," says Bertrand Matthelié. VENNSTER BLOG: User Experience in Fusion apps "When I heard about the Fusion Applications User Experience efforts, I was skeptical," says Oracle ACE Director Lonneke Dikmans of Vennster "My view of Oracle and User Experience has changed drastically today." Power Your Cloud with Oracle Fusion Middleware Running in over 50 cities across the globe, this event is aimed at Architects, IT Managers, and technical leaders like you who are using Fusion Middleware or trying to learn more about middleware in the context of Cloud computing.

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• sonicwall nsa 240

  - by Adam

  Hi We are looking into putting a hardware firewall into a data center to protect our rack of servers. We are using the servers for terminal services and we have 2 x 1GB connections to the Internet. We have about 50 servers supporting about 250 users which will grow very soon to 500 users. We plan to purchase 2 hardware firewalls to provide HA. Do you think the Sonicwall NSA 240 with Total Secure is a good match for this in terms of performance and protection (from spyware, virus etc?) or is there a better purchase? (Maybe a Watchguard X5 or X8?)

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• redundant/multi-site terminal server

  - by Adam

  Hi We have a Hyper-V cluster running 5 virtual terminal servers using HA. We need to be able make this system redundant and so if this site was to fail our users could log into the backup system at another location and access their data via the terminal servers. Any ideas? We were thinking of maybe using a NAS which replicated the data to the other location in real-time(pass-through disks)? and having a similar Hyper-V cluster setup in the backup location. However we would need to create the users in both location and create a virtual mirror without the data ie applications, directories, settings etc. Is this the best way to achieve this? We have read that using Hyper-v pass through disks is a big performance de-grade.

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• CLR and C# Learning Materials

  - by Gerry O'Brien

  Have you ever found that one book or resource that just brings it all home?  Seriously.  These are rare finds when you read the content and all the stars seem to align, you have those "Ah ha!" moments. Well, I have found that book and it is CLR via C#, Third Edition by Jeffrey Richter.  If you're not familiar with Wintellect, look them up.  This book is published by Microsoft Press and is the third edition of this title.  I'm in chapter 5 at the moment and already I have a better understanding of the CLR and how things work.  I'm a former Visual Basic MVP and C# is a language I learned as a result of projects I worked on at a software development company a few years ago.  Like a lot of VB programmers, I never went deep into the workings of the "behind the scenes" aspects and just focused on the applications. My next possible career move involves a deeper knowledge of the CLR and a .NET language.  This book is one that I will have my bookshelf for reference long after I have read that last page. Gerry

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• Elofordult már, hogy nehezen tudta értelmezni milyen patch-et is javasolt a támogató mérnök?

  - by user552636

  Bevallom, Ügyfeleink bejelentéseinek monitorozása közben nem egyszer gondolkodóba estem, mit is jelentenek a PSE, MLR, One-off, és további gyönyöruséges kifejezések, melyeket a támogató mérnökök használnak. Nemrégiben bukkantam rá a My Oracle Suport-on a  Document ID 1430923.1 cikkre, melyben ezen kifejezések magyarázatát át tudjuk tekinteni. Szerencsére a leírásban szerepelnek a korábbi kifejezések is, mert én úgy látom vannak támogató mérnökök akik egyelore még a régi elnevezéseket használják. Ha már a javításokról esik szó, szeretném felhívni a figyelmet az Oracle Tech Error Correction Policy document-re is, mely nagyszeru áttekintést ad az Oracle bug javítási irányelveirol. Ebben a dokumentumban megtalálhatjuk a Release Schedule of Current Database Releases (Doc ID 742060.1)  és  Error Correction Support Timelines for Oracle Application Server (Fusion Middleware) (Doc ID 944866.1) cikkek hivatkozásait is melyeken belül akár az Adatbázis és Fusion Middleware termékek roadmap-jéig is eljuthatunk. Érdemes ezeket a cikkeket a My Oracle Support felületen kedvencnek megjelölni, hogy bármikor könnyedén elérhetok legyenek. A számunkra hasznos cikket a kedvencek közé a cikk címe melletti csillagra kattintva tehetjük kedvenceink közé és következo alkalommal a menüsorban talál csillagra kattintva varázsolhatjuk elo az alábbi képernyo részletek szerint. 

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• Network adapters reliability

  - by casey_miller

  Can you help me with understanding of reliability of network adapters. Most of the time servers do have at least 2 NIC's bonded to provide sort of a HA for it. So in case of one NIC fails, the second would still do the job. I wonder which factors work when you use network adapters. I know that, the most important and weakest part of any computer system is: storage (i.e HDD). but how reliable actually network adapters are? There are more expensive ones, and cheaper adapters. In which cases do they actually fail? In what circumstances. May it be a intensive usage of them Time when it's on In your experience how often you found yourself changing NIC's due to their fail? Or just what's the typical lifetime of commodity NIC's? thanks.

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• Docker vs ESXi for Startup Projects - Deploying Code for Dev Testing

  - by JasonG

  Why hello there little programmer dude! I have a question for you and all of your experience and knowledge. I have an ESXi whitebox that I built which is an 8 dude that sits in the corner. I made a mistake recently and took the key that had ESXi, formatted it and used it for something else. No big deal because the last project I worked on had stalled out. I'm about to pick up another project and now I need to spin up a whole bunch of stuff for CI, qa + db, ticket tracker, wikis etc etc. I've been hearing a lot about Docker recently and as this is just a consumer grade machine, I'm wondering if it may make more sense for me to use Docker on OpenOS and then put everything there - bamboo or hudson, jira, confluence, postgress for the tools to use, then a qa env. I can't really seem to find any documents that directly compare traditional VM infrastructure vs docker solutions and I'm wondering if it is fair to compare. Is there any reason why CoreOS w/ containers would be a strictly worse solution? Or do you have any insight into why I may want to stick with ESXi? I've looked on multiple occasions and can't find a good reason not to. I'm not going to run a production env on the server so I don't need to have HA if updating security or OS for example where esxi would allow me to restart one vm at a time. I can just shut the thing down and bring it back up if I need a reboot no problem. So what's up with this container stuff? Is it a fair replacement for ESXi? I'm guessing the atlassian products would run much better and my ram would go a lot farther using docker. Probably the CPU would run much cooler too and my expensive HDD space would be better utilized.

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• BGP Router reccomendations for simple redundancy [closed]

  - by Jona

  We have two sites that each have an internet connection and have a dedicated dark fibre between them. Each site has it's own IP space and we have an AS number. We're looking to be resilient to failure of the internet connection to either site and so need to buy a pair of approriate routers. Requirements are: Able to run 2 bgp sessions (one with the ISP, one with the other site router) Option to take a full table from the upstream ISPs would be nice. Able to provide HA gateways on the LAN side (e.g. 192.168.0.254 will automatically migrate if it's host router lost power) A dedicated device rather than a server running Linux / BSD Not crazy expensive. Any help / advice much appreciated.

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• Scalable WordPress Host for High-Volume Site?

  - by Jonathan Eunice

  I need recommendations for a scalable web host for a high volume WordPress web site. For my purposes, high-volume might be 100K-500K visitors/hour. Might think towards a 1M/hour burst rate as a "high water mark." I know WP isn't the highest-performing platform out there (ha!), but it's non-negotiable. I can do "the usual optimizations" (e.g. put static files in a CDN, run and follow the advice of performance analyzers like YSlow, etc). But it will still be WordPress, and there will be a dozen or so plugins involved. So, where to host the site? Most "what's the best WordPress host?" discussions seem to focus on lowest-cost. I need the opposite. What are the high-volume, scalable, or clustered WordPress hosts with which you've had great experiences?

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• Brocade 200E Switch - Fibre Channel

  - by Arthor

  What I have: Fujitsu-Siemens PRIMERGY BX600 Brocade 200E (16 port, 4gbit fibre). My question: Imagine a QNAP with a fiber 10GBIT card connected to the Brocade 200E (16 port, 4gbit fibre). Would this work; would the card drop down to 4GBIT? Are 10GBIT fiber cards backwards completable. Update. I have the specs of my server now.... Fujitsu-Siemens PRIMERGY BX600 S3 Blade Ecosystem Blade Chassis comprising; 2 x A3C40073243 Blade Management modules 2 x A3C40089238 GBE Switch Blade SB9F 30/12 2 x A3C40085736 4Gb 10 port pass through blades 1 x A3C40083767 Digital KVM Modules 2 x A3C40073245 Fan enclosures + cooling fans 4 x A3C40073262 Power Supplies My Goals and Objectives To have a blade system in place for 8 blades for video rendering, the other 2 for database and scripts etc The system will be built on VMWARE ESXi 5 Use ISCSI on the QNAP to support HA and vmotion if needed Users to access the qnap for video editing QANAP has 12 drive (2 x (6 HDD in RAID 10)

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