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1Z1-554 exam Dumps Source : Oracle Application evolution Framework(R) Essentials

Test Code : 1Z1-554
Test denomination : Oracle Application evolution Framework(R) Essentials
Vendor denomination : Oracle
: 88 real Questions

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Oracle Oracle Application evolution Framework(R)

Oracle Launches application building Framework cellular customer | killexams.com real Questions and Pass4sure dumps

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Oracle Introduces Free version of Oracle software construction Framework | killexams.com real Questions and Pass4sure dumps

REDWOOD SHORES, CA--(Marketwire - Sep 24, 2012) - Oracle ( NASDAQ : ORCL )

news information

Free version raises entry to facile software development

  • because the strategic framework used to build many Oracle functions together with Oracle Fusion applications, Oracle ADF is an conclusion-to-end Java Platform, enterprise version (Java EE) framework that simplifies utility building via providing out-of-the-box infrastructure services and a visual and declarative construction experience.
  • available for download through Oracle know-how community (OTN), Oracle ADF essentials gives an easier no cost approach to enhance commercial enterprise functions with core capabilities, including:
  • Oracle ADF Faces: a set of more than 150 superior, web person Interface (UI) accessories in accordance with JavaServer Faces (JSF) that simplify the advent of affluent web UIs, including interactive information visualization.
  • Oracle ADF Controller: An extension of the JSF controller layer that helps build comprehensive reusable system flows and gives the means to create dynamic areas with changing content material in net pages.
  • Oracle ADF Binding: gives a simplified approach to connecting consumer interfaces to quite a lot of enterprise services via an XML-based, meta-facts abstraction layer.
  • Oracle ADF commerce add-ons: Simplifies constructing commerce features in opposition t relational databases by means of presenting declaratively-configured, reusable add-ons that set in favor common design patterns. Oracle ADF necessities includes the core points of Oracle ADF, but doesn't encompass the following enterprise capabilities which are built into the complete Oracle ADF: declarative customization, granular safety layer, integration with Oracle SOA Suite and Oracle ADF mobile.
  • aiding rates

  • "Oracle ADF is already proven because the strategic framework used to construct Oracle Fusion purposes," referred to Chris Tonas, vice president utility building equipment, Oracle. "With Oracle ADF necessities they maintain now mixed key tooling from Oracle ADF, Oracle JDeveloper and Oracle commercial enterprise Pack for Eclipse in a free offering that may still live a fine passage for a lot of of their customers and partners to bounce start their building efforts."
  • "At Innowave technology they maintain been leveraging Oracle ADF to quicken up task turn-around time at diverse client engagements," mentioned Basheer Khan, CEO of Innowave technology. "Oracle ADF offers us an built-in construction framework with innovative performance and exceptional tooling that simplifies their construction procedure. Having an Oracle ADF edition that may too live used with out licensing expenses and with the potential to escape on open-source servers equivalent to GlassFish Server Open supply version will allow us to leverage Oracle ADF in additional scenarios and with unusual shoppers."
  • aiding substances

    About Oracle Oracle engineers hardware and software to labor collectively in the cloud and on your information center. For extra tips about Oracle ( NASDAQ : ORCL ), consult with www.oracle.com.

    About Oracle OpenWorld Oracle OpenWorld San Francisco is the most essential academic and networking adventure of the 12 months for Oracle technologists, customers, and partners. This assistance expertise event is dedicated to helping companies optimize current programs and recall upcoming technology breakthroughs. The convention, which draws greater than 50,000 attendees from over a hundred and ten nations, presents greater than 2,one hundred academic periods, 400 product demos, exhibitions from 450 partners showcasing purposes, middleware, database, server and storage techniques, industries, management and infrastructure -- All engineered for innovation. Oracle OpenWorld 2012 is being held September 30-October 4 at the Moscone hub in San Francisco. For extra guidance or to register, tickle search counsel from www.oracle.com/openworld. Watch Oracle OpenWorld keynotes, classes and more are living on YouTube. be Part of the Oracle OpenWorld discussion on Twitter, facebook and the Oracle OpenWorld weblog.

    emblems Oracle and Java are registered logos of Oracle and/or its affiliates. different names may well live trademarks of their respective house owners.


    vice president, Technical Lead | killexams.com real Questions and Pass4sure dumps

    Morgan Stanley capabilities community, Inc. seeks a vp, Technical Lead in long island, ny

    Create party and Account statistics technologies architecture, infrastructure, and software stack including master facts management HUB, database, application servers, Operational Reference save, tall Availability, and catastrophe healing. supply structure oversight and build commercial enterprise utility stacks for a grasp information administration platform. collect evolution necessities, conduct evaluation, and conceptualize framework. Design and oversee prototype building and architectural framework. set together design documents. enhance and implement various technical necessities. ensure the construction of technical options are aligned with corporation processes and manner. conduct functional and efficiency tests for purposes. unravel discrepancies recognized during construction and testing. resolve implementation and deployment issues. participate in construction undertaking planning. boost, adjust, increase, and evaluation code. set together and evaluate examine situations. evaluation and anatomize view at various consequences.

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    ADF Essentials Installation With MySQL and Glassfish (January 2016) | killexams.com real questions and Pass4sure dumps

    ADF Essentials is the free version of the Applications evolution Framework from Oracle. It can escape on MySQL as well as Oracle database. It seems a mighty and inexpensive alternative to the pricey Java Cloud Service.

    For most of the part, I followed Sten’s Vesterli reserve for the installation but with upgraded versions of the ADF libraries and JDeveloper (and Glassfish) as of January 2016 I was tempted to try the latest and greatest. Unfortunately I ran into some issues with 12.2.1.0 and 12.1.3 mostly related with ADF Faces errors when deploying on Glassfish.

    So here is how I ended up building my inexpensive ADF Essentials platform on Windows 8.1. I’ve too added a few comments and tasks I had to escape during the install and deployment of my first ADF Essentials application.

    Version Downloads
  • MySQL 5.6.27
  • Glassfish 3.1.2.2
  • MySQL Connector for Glassfish (JDBC) 5.1.38
  • ADF Essentials 11.1.24
  • JDK 1.6.x (JDK 7 giving some ADFContext errors running AM)
  • MySQL Installation
  • Setup Type: Developer Default
  • 2. Check Requirements → Execute missing libraries (Ignore the ones for Visual Studio and Python)

    3. Execute Installation

    4. type and Networking -> Default (Port # 3306)

    5. Add root password

    6. Windows Service Name: MySQL56 (everything else leave by default)

    7. Check Connection to Server and execute scripts

    8. Review log file and write down the installation path: C:\ProgramData\MySQL\MySQL Server 5.6

    9. Change the following in my.ini:

    sql-mode=ORACLE

    10. Restart MYSQL56 Service.

    11. escape MySql Workbench and test the connection by entering some queries for the Sakila database.

    Installing Glassfish and JDK
  • Run java_ee_sdk-6u4-jdk7-windows-x64.exe
  • Installation Type: Typical
  • Installation Directory: c:\glassfish3
  • Uncheck Install Update Tool
  • Run install
  • Setup Glassfish Domain

    Leave default and add Password

    Test Domain: http://localhost:8080

    Admin Domain: http://localhost:4848

    Install MySQL Connector in GlassFish
  • Copy mysql-connector-java-5.1.38-bin.jar into the Glassfish domain (C:\glassfish3\glassfish\domains\domain1\lib)
  • Stop and start Glassfish
  • c:\glassfish3\bin\asadmin start-domain domain1

    c:\glassfish3\bin\asadmin stop-domain domain1

    Add Data Source
  • Open Admin Console: http://localhost:4848
  • 2. Create JDBC Connection Pool:

    3. Set the following Additional Properties on Step 2:

  • DatabaseName: sakila
  • Password: xxxxx
  • ServerName: localhost
  • Url: jdbc:mysql://:3306/sakila
  • URL: jdbc:mysql://:3306/sakila
  • User: root
  • 4. Add JDBC Resource

    5. Ping from the SakilaPool to test that the server is running with this configuration.

    6. execute confident that the Wrap JDBC Objects is disabled

    Installing ADF Essentials Libraries in Glassfish
  • Unpack All files in one selfsame directory
  • Copy All files to the lib directory of the Glassfish domain (C:\glassfish3\glassfish\domains\domain1\lib)
  • From GlassFish Admin (http://localhost:4848/) change the JVM option as ;it note below -XX:MaxPermSize=512m
  • Also add the following one to avoid “getMDSInstance error” when running the application:

    4. Restart Domain 1

    Setup JDeveloper with MySql Connector
  • Install JDeveloper 11.1.2.4 (Create a unusual folder called c:\Jdeveloper11.1.2.4 as they may maintain more than one version installed in their PCs)
  • Copy mysql-connector-java-5.1.38-bin.jar to C:\jdeveloper11.1.2.4\jdeveloper\jdev\lib
  • From within JDeveloper choose Tools | Manage Libraries and create a unusual library
  • 4. Enter the path for the file you just copied to the JDeveloper libraries folder and press OK

    Add Application Server
  • New Application Server Connection
  • 2. Connection Type: Glassfish 3.1

    3. Authentication: Enter Username: admin and your password

    4. Leave default denomination and ports

    5. execute confident All connection tests are successful and you are ready to start building your first ADF Essentials application.

    Assign Security grants to Admin in Glassfish

    This is probably used when need to connect to the Glassfish server remotelly

    Alternatively you can effect the following:

    asadmin — host localhost — port 4848 enable-secure-admin

    Creating MySQL Connection

    Oracle Announces Availability of Software evolution Kit for Spring | killexams.com real questions and Pass4sure dumps

    REDWOOD SHORES, Calif., May 9 // -- Oracle today announced availability of the Oracle(R) evolution Kit for Spring. The unusual evolution kit is designed to simplify the development, deployment and management of Spring-based enterprise Java applications.

    As developers view to quickly and easily create high-quality applications, they require the license to choose the technologies, components and frameworks that best meet their requirements. As a result, developers are increasingly using components of Oracle Fusion Middleware with Spring's leading open source application evolution framework. Spring's layered architecture allows developers to pick and choose pieces of the framework, which provides optimal flexibility without sacrificing performance.

    To aid enhance the productivity of developers using Oracle Fusion Middleware products for Java such as Oracle JDeveloper, Oracle's free Integrated evolution Environment (IDE), or Oracle Application Server with Spring, the Oracle evolution Kit for Spring includes:

    o The Spring Framework 2.0 -- the latest version of Spring'slight-weight, open source application evolution framework;

    o Oracle JDeveloper Extension for Spring -- provides wizards and fulleditor support for both Spring 1.x and 2.0-style definitions completewith code insight, auto-complete and XML validation;

    o Oracle Developer Depot -- a free, Spring-based developer productivitytool that dramatically simplifies the passage Java developers find,configure and provision Java applications;

    o Pre-packaged Sample Applications and Tutorials -- aid developers getSpring-based applications up and running quickly; and

    o Transaction Manager Integration -- allows developers to leverage thelightweight programming model of Spring with the high-performancetransactional capabilities of Oracle Application Server.

    "The Spring Framework is a key component in delivering a tall attribute service to their users, and they view forward to benefiting from the significant pains Oracle is making to tightly integrate Spring with Oracle Application Server," said Colin Clive, ICT Products evolution Manager, Student Loans Company Limited.

    Oracle's Expertise with Spring

    The longstanding collaboration between Oracle, Interface21 and the Spring community continues to deliver numerous innovations and enhancements. Oracle will donate components of the Oracle evolution Kit for Spring to the Spring community. The donation complements Oracle's previous donation of TopLink(R) Essentials, which now ships with the Spring Framework 2.0. As the number of customers leveraging the strengths of the Oracle software stack along with the Spring Framework continues to expand rapidly, Oracle and Interface21 are committed to providing additional points of integration.

    "Oracle has gained significant expertise in Spring as a result of their collaboration with Interface21 and internal use of the framework," said Steven G. Harris, vice president, Java Platform Group, Oracle. "The Oracle evolution Kit for Spring is a natural step in their efforts to simplify enterprise Java development. As more and more customers use Oracle's Java evolution platform in conjunction with the Spring framework, they behold increasingly innovative results."

    "It's been exciting to behold the Spring community flourish and their collaboration with Oracle has helped contribute to that," said Rod Johnson, founder of the Spring Framework and CEO of Interface21. "As Interface21 and Oracle continue to drive innovations in the Java developer world, they view forward to providing more integration points that better productivity and election for developers. The Oracle evolution Kit for Spring is another proof-point of their joint commitment to this goal."

    Oracle's Commitment to Java Developers

    A leading supporter and instrumental contributor to defining key standards and aspects of Java since its inception in 1995, Oracle recognizes that a faultfinding constituent in driving the adoption of the next-generation Java Platform, Java EE 5, is simplification of evolution around EJB 3.0 and JavaServer Faces (JSF) 1.2, a Web application framework designed to facilitate evolution of user interfaces for enterprise Java applications. last year, Oracle launched the Oracle Developer Depot, a free, downloadable developer productivity tool that dramatically simplifies the passage Java developers find, configure and provision Java applications for learning or prototyping purposes. The company too leads the Eclipse JPA, BPEL and JSF Tooling projects, served as co-spec lead for EJB 3.0 and recently donated Oracle Toplink(R), the industry's most advanced, award-winning persistence architecture, to the open source community. In conjunction with that donation, Oracle leads a unusual Eclipse run-time project to provide persistence services that can live used in Java and OSGi environments. Oracle is too a founding member of the JSF expert group in the Java Community Process (JCP) and joined the Apache MyFaces project as a core contributor.

    Availability

    The Oracle evolution Kit for Spring is available for free download at: www.oracle.com/goto/spring. Terms, conditions, and restrictions apply.

    Developers can visit Oracle Technology Network (OTN), otn.oracle.com/, for access to a wealth of additional information and in-depth coverage of key evolution topics, specifically designed to assist developers.

    About Oracle

    Oracle (NASDAQ:ORCL) is the world's largest enterprise software company. For more information about Oracle, visit their Web site at http://www.oracle.com/.

    Trademarks

    Oracle and TopLink are registered trademarks of Oracle Corporation and/or its affiliates. Other names may live trademarks of their respective owners.

    This announcement is provided to you solely for information purposes, is not a commitment to deliver any material, code, or functionality, and should not live relied upon in making purchasing decisions. Many factors can materially palpate Oracle's product evolution plans and the nature and timing of future product releases. The development, release, and timing of any features or functionality described remains at the sole discretion of Oracle. This information may not live incorporated into any contractual agreement with Oracle or its subsidiaries or affiliates. Oracle specifically disclaims any liability with respect to this information.

    Source: Oracle

    CONTACT: Letty Ledbetter, +1-650-506-8071, letty.ledbetter@oracle.com, Teri Whitaker, +1-650-506-9914, teri.whitaker@oracle.com, both of Oracle

    Web site: http://www.oracle.com/

    Related Thomas Industry Update Thomas For Industry

    Creating unusual Resource Types | killexams.com real questions and Pass4sure dumps

    This chapter is from the reserve 

    As described in the section "Data Service and Application Agents" in Chapter 2, "Oracle Solaris Cluster: Features and Architecture," Oracle has a substantial list of supported agents that cover most of the applications in your data center. These application agents are maintained by Oracle and are extensively tested on each unusual release of both the Solaris Cluster software and the application itself. Even so, inevitably you will maintain an application that is not Part of the existing agent portfolio.

    Application Suitability

    Before creating a resource type for your application, you must determine whether the application meets the criteria for being made highly available. The following list highlights the main points you must consider. For a complete list behold "Analyzing the Application for Suitability" in [SCDevGuide].

  • Is your application crash-tolerant? This is famous because in a highly available environment your application must live able to regain its data consistency without requiring manual intervention. If the application did require such intervention, then most of the benefits of a high-availability framework would live lost.
  • Does your application rely on the physical node denomination of the machine, such as that resulting from calls to uname, gethostbyname, or equivalent interfaces? If so, then when the application moves to another cluster node, the dependency on the physical hostname will probably occasions the application to fail. There is a work-around to this problem, which is to interpose the libschost.so.1 library. However, this work-around can sometimes raise support issues with application vendors.
  • Can your application escape on a multihomed system, that is, one with several public networks? Your application must live able to handle situations where IP addresses are configured and unconfigured from network adapters as services rend around the cluster. This has consequences for the passage your application binds to the network.
  • Does your application use hard-coded path names for the location of its data? If so, then symbolic links might not live sufficient to ensure that the data is stored in a location that is compatible with using a failover or global file system. If the application renames a data file, it can wreck the symbolic links.
  • After you maintain determined that your application is suitable for being made highly available, you maintain several ways to achieve the necessary integration:

  • You can use the Generic Data Service (GDS) directly and just supply the required parameters. Although you cannot define any unusual extension properties for the resource type you create, it is by far the simplest option.
  • You can create a subclass of the GDS to create a completely unusual resource type. This option enables you to define one or more extension properties for your unusual resource type. This option is relatively simple and yet provides considerable flexibility.
  • You can extend the GDS using the Advanced Agent Toolkit. Although this option does not create a unusual resource type, it does enable you to define one or more extension properties. This option is too relatively simple and provides considerable flexibility.
  • You can use the GUI scdsbuilder tool and customize the resulting shell script or C source using the Resource Management API (RMAPI) and the Data Service evolution Library (DSDL) APIs. If significant customization labor is needed, this option might result in an increased maintenance burden.
  • You can use the RMAPI or DSDL APIs directly to develop your resource type from scratch. This option trades the evolution and maintenance costs for ultimate flexibility and performance.
  • Each option is discussed in more detail in the following sections.

    Generic Data Service

    The Generic Data Service (GDS) is provided with the Solaris Cluster software. The SUNW.gds agent is packaged in the SUNWscgds package, which is installed as yardstick by the Solaris Cluster software installer program. The SUNW.gds agent is considered the preferred passage to create both failover and scalable resources. The GDS is supported by Oracle, but you must support the script that you provide for the Start_command, Stop_command, Probe_command, and Validate_command methods.

    By default, the SUNW.gds resource type is not registered, so you must register it before attempting to create a resource of that type. The commands in the following sample note how to determine if the resource type is registered and then how to register it, if it is not already present.

    Example 4.13. Registering the SUNW.gds Resource Type

    Use the clresourcetype command to determine whether the SUNW.gds resource type needs to live registered.

    # clresourcetype list | grep SUNW.gds # clresourcetype register SUNW.gds # clresourcetype list | grep SUNW.gds SUNW.gds:6

    In addition to the yardstick resource properties, the GDS agent has four properties to enable you to integrate your application: Start_command, Stop_command, Probe_command, and Validate_command. These properties are described in "Integrating Your Application-Specific Logic." By using the GDS as the basis for your application, you automatically benefit from All the patches and feature upgrades that the GDS receives.

    Example 4.14 shows how you can use the GDS to execute the X11 program xeyes highly available. You initiate by creating a Start_command program. In this example, a script calls the full path denomination of the program with a parameter that is passed to the shell script. This script must exist on All the cluster nodes on which the application is intended to run.

    Next, having checked that the SUNW.gds resource type is registered, you create the resource group. In this example, you allow the resource group's node list to default to All the cluster nodes.

    Next, you create a resource to limn your program. In the example, the Start_command property is specified by the script you wrote (and which must exist on All nodes). The pomp parameter to use is too specified. Because this program does not listen on any network ports, you set the network_aware property to false. This means that the probe mechanism used will live the continued existence of the xeyes process that the Start_command program leaves running in the background. By default, any resource you create is enabled so that when the resource group is brought online, the resource is automatically started. To change the default, you can specify the -d dispute to the clresource create command.

    The last two steps instruct the RGM that it needs to control or manage the xeyes-rg resource group and then to bring that resource group online. The action of bringing the resource group online starts the resource because it was created in an enabled state.

    Assuming you maintain allowed remote X11 clients to pomp on your X server using xhost and you maintain specified the correct X pomp to use (substitute a value suited to your environment for myhost:1.0), then the xeyes program will emerge on your display. You can switch the resource group between nodes and the RGM will cancel the xeyes process and restart it on the unusual node, phys-summer2, as the sample shows.

    Example 4.14. Creating a Simple, Highly Available xeyes Service

    List the script that will live used to start the xeyes command.

    # cat /tmp/start_xeyes #!/bin/ksh /usr/openwin/demo/xeyes -display $1 & exit 0

    Check that the SUNW.gds resource type is registered, and then create the resource group and resource that will control the xeyes service.

    # clresourcetype list | grep SUNW.gds SUNW.gds:6 # clresourcegroup create xeyes-rg # clresource create -t SUNW.gds > -p start_command="/tmp/start_xeyes myhost:1.0" > -p network_aware=false > -g xeyes-rg xeyes-rs

    Use the clresourcegroup command to bring the xeyes-rg resource group online.

    # clresourcegroup manage xeyes-rg # clresourcegroup online xeyes-rg # clresourcegroup status xeyes-rg === Cluster Resource Groups === Group denomination Node denomination Suspended Status ---------- --------- --------- ------ xeyes-rg phys-summer1 No Online phys-summer2 No Offline # clresourcegroup switch -n phys-summer2 xeyes-rg # clresourcegroup status xeyes-rg === Cluster Resource Groups === Group denomination Node denomination Suspended Status ---------- --------- --------- ------ xeyes-rg phys-summer1 No Offline phys-summer2 No Online

    To demonstrate how the GDS handles application failure, quit the xeyes program from your X display. You will notice that the RGM restarts the application almost instantaneously. The messages in /var/adm/messages (see sample 4.15) testify that the RGM recognized the failure and restarted the service.

    After the failing probe determines that the service is online, indicated by Service is online in /var/adm/messages, cancel the process again. The resource has two properties that determine how many times it is restarted by the RGM within a certain time period. These properties are Retry_count and Retry_interval (see sample 4.16). After the specified number of failures, the built-in logic of the GDS determines that the current node is unhealthy and releases the service so that it can live started on another node. If the service too experiences problems on this node, then the RGM will not fail the service back to its original node unless the time period, in seconds, as defined by the resource group's Pingpong_interval property, has passed. Instead, the GDS attempts to support the service running on the remaining node. This conduct is governed by another property called Failover_mode.

    The purpose of the Pingpong_interval property is to avert a service that fails to start from endlessly looping, resulting in the service migrating back and forth between cluster nodes. In a test environment, you might need to reset the value of Pingpong_interval to a lower value. Doing so enables you to restart your service once you maintain corrected any problems you encountered.

    Example 4.15. Sample RGM Messages

    The /var/adm/messages file contains information on the status changes of the resource groups and resources in the cluster.

    Nov 23 04:00:23 phys-summer2 Cluster.RGM.global.rgmd: [ID 529407 daemon.notice] resource group xeyes-rg status on node phys-summer2 change to RG_ONLINE Nov 23 04:01:23 phys-summer2 Cluster.RGM.global.rgmd: [ID 922363 daemon.notice] resource xeyes-rs status msg on node phys-summer2 change to <Service is online.> Nov 23 04:01:25 phys-summer2 Cluster.PMF.pmfd: [ID 887656 daemon.notice] Process: tag="xeyes-rg,xeyes-rs,0.svc", cmd="/bin/sh -c /tmp/start_xeyes myhost:1.0", Failed to sojourn up. Nov 23 04:01:25 phys-summer2 Cluster.RGM.global.rgmd: [ID 784560 daemon.notice] resource xeyes-rs status on node phys-summer2 change to R_FM_FAULTED Nov 23 04:01:25 phys-summer2 Cluster.RGM.global.rgmd: [ID 922363 daemon.notice] resource xeyes-rs status msg on node phys-summer2 change to <Service daemon not running.> Nov 23 04:01:25 phys-summer2 SC[,SUNW.gds:6,xeyes-rg,xeyes-rs,gds_probe]: [ID 423137 daemon.error] A resource restart attempt on resource xeyes-rs in resource group xeyes-rg has been blocked because the number of restarts within the past Retry_ interval (370 seconds) would exceed Retry_count (2) Nov 23 04:01:25 phys-summer2 SC[,SUNW.gds:6,xeyes-rg,xeyes-rs,gds_probe]: [ID 874133 daemon.notice] Issuing a failover request because the application exited. Nov 23 04:01:25 phys-summer2 Cluster.RGM.global.rgmd: [ID 494478 daemon.notice] resource xeyes-rs in resource group xeyes-rg has requested failover of the resource group on phys-summer2. Nov 23 04:01:25 phys-summer2 Cluster.RGM.global.rgmd: [ID 423291 daemon.error] RGM isn't failing resource group <xeyes-rg> off of node <phys-summer2>, because there are no other current or potential masters Nov 23 04:01:25 phys-summer2 Cluster.RGM.global.rgmd: [ID 702911 daemon.error] Resource <xeyes-rs> of Resource Group <xeyes-rg> failed pingpong check on node <phys- summer1>. The resource group will not live mastered by that node. Nov 23 04:01:25 phys-summer2 SC[,SUNW.gds:6,xeyes-rg,xeyes-rs,gds_probe]: [ID 969827 daemon.error] Failover attempt has failed. Nov 23 04:01:25 phys-summer2 SC[,SUNW.gds:6,xeyes-rg,xeyes-rs,gds_probe]: [ID 670283 daemon.notice] Issuing a resource restart request because the application exited. Example 4.16. Retry, Failover Mode, and Ping-pong Interval Properties

    Use the clresource command to determine the property values of the xeyes-rs resource.

    # clresource note > -p retry_count,retry_interval,failover_mode xeyes-rs === Resources === Resource: xeyes-rs --- yardstick and extension properties --- Retry_interval: 370 Class: standard Description: Time in which monitor attempts to restart a failed resource Retry_count times. Type: int Retry_count: 2 Class: standard Description: Indicates the number of times a monitor restarts the resource if it fails. Type: int Failover_mode: SOFT Class: standard Description: Modifies recovery actions taken when the resource fails. Type: enum # clresourcegroup note -p pingpong_interval xeyes-rg === Resource Groups and Resources === Resource Group: xeyes-rg Pingpong_interval: 3600

    In the preceding example, the pomp variable property can live changed only by stopping the resource and modifying the Start_command property. Although of miniature consequence here, because the xeyes program must live restarted to change the target X server on which it displays, it does execute a incompatibility in instances where a variable can live changed while a service is running. Examples comprehend changing debugging levels to use and changing directories for log files.

    To create a resource type that has unusual extension properties that can live changed when you need to change them, you need to either write your resource type from scratch or create a subclass of the GDS, as described in a later section.

    Supporting unusual Applications Using the Advanced Agent Toolkit

    Many application agents in the current Solaris Cluster software release are derived from the Advanced Agent Toolkit methodology [AdvGDSTlkit]: HA-PostgreSQL, HA-MySQL, and HA containers, to denomination three. All three use the SUNW.gds agent as their basis. However, in its raw form, the SUNW.gds agent has some limitations.

    The rationale behind the toolkit is that All unusual application agents maintain many common requirements:

  • They might require one or more extension properties.
  • They must provide debugging information.
  • They might need to disable the process-monitoring facility (pmfadm) for applications that leave no obvious child processes to monitor.
  • They must supply a Start_command script, as a minimum, and possibly Stop_command, Probe_command, and Validate_command scripts.
  • The toolkit too simplifies much of the labor needed to handle Oracle Solaris Zones and SMF. Thus, providing this extended framework enables your developers to focus on the application-specific integration labor rather than on debugging the framework itself. After the labor is complete, the unusual resource type is registered using a registration script.

    Developing Resource Types by Creating a Subclass of the GDS

    The edge of creating a subclass of the GDS, rather than writing a unusual resource type from scratch, is that the unusual resource type inherits All the best practices that are already Part of the yardstick GDS code. In addition, creating a subclass of the GDS enables you to create your own resource type extension properties while retaining the selfsame plane of flexibility as if you had started from scratch. Finally, your unusual resource type, which is a subclass of the GDS, has a several name, enabling you to easily distinguish resources of the unusual resource type. If you instead used the Advanced Agent Toolkit or the SUNW.gds agent, then you would maintain to determine what the resource is by examining the extension properties or reviewing the code. This step would live necessary because the resource type would live set to SUNW.gds, rather than MYCORP.appsvr, for example.

    You create a subclass of the GDS by creating a resource type registration (RTR) file where the RT_basedir parameter is set to the directory containing binaries used by the yardstick GDS methods: Start, Stop, Validate, and so on. You then extend the RTR file by defining your own resource type extension properties. Finally, you set the passage parameters in the RTR file to point to your scripts that override the yardstick GDS behavior.

    Several existing Sun resource types are implemented this way, including the HA-Logical Domain agent (SUNW.ldom), which was covered in the section "Failover Guest Domains" in Chapter 3, "Combining Virtualization Technologies with Oracle Solaris Cluster Software."

    The RTR file for the SUNW.ldom resource type is shown in sample 4.17. In this RTR file, the RT_basedir parameter is set to the yardstick directory for the GDS package, that is, /opt/SUNWscgds/bin. Of the yardstick methods, only Init, Boot, and Validate maintain been overridden using programs that are located in the ../../SUNWscxvm/bin directory. Unlike a yardstick GDS resource type, the Start_command, Stop_command, Probe_command, and Validate_command properties are assigned fixed values and cannot live changed. This is indicated by the Tunable = not anything settings. Furthermore, each command, apart from validate_command, is called with a consistent set of arguments, namely, -R %RS_NAME -T %RT_NAME -G %RG_NAME. The %variable construct is similar to the $variable syntax institute in shell scripts. It means that when a resource of this type is instantiated, use the names you assigned it as arguments. For example, if you wrote a resource type called FOO.bar and then created a resource group called whizz-rg containing a resource called bang-rs of this type, the dispute passed would live -R bang-rs -T FOO.bar -G whizz-rg. With these arguments, you can then execute calls to the RMAPI or DSDL APIs to retrieve or set properties.

    In contrast to the Start_command, Stop_command, and Probe_command properties, the Validate_command property does not use this construct. Instead, the RGM passes the validate command All the properties listed for the resource type on the command line. Then the validate command parses this list and determines whether the configuration is valid.

    Example 4.17. RTR File for the SUNW.ldom Resource Type

    The following text shows some of the key parts of the RTR file for the SUNW.ldom resource type:

    . . . RESOURCE_TYPE = "ldom"; VENDOR_ID = SUNW; RT_DESCRIPTION = "Sun Cluster HA for xVM Server SPARC Guest Domains"; RT_version ="1"; API_version = 10; RT_basedir=/opt/SUNWscgds/bin; Init = ../../SUNWscxvm/bin/init_xvm; Boot = ../../SUNWscxvm/bin/boot_xvm; Start = gds_svc_start; Stop = gds_svc_stop; Validate = ../../SUNWscxvm/bin/validate_xvm; Update = gds_update; Monitor_start = gds_monitor_start; Monitor_stop = gds_monitor_stop; Monitor_check = gds_monitor_check; Init_nodes = RG_PRIMARIES; Failover = FALSE; # The paramtable is a list of bracketed resource property declarations # that foster after the resource-type declarations # The property-name declaration must live the first attribute # after the open curly of a paramtable entry # # The following are the system defined properties. Each of the system defined # properties maintain a default value set for each of the attributes. view at # man rt_reg(4) for a detailed explanation. # { PROPERTY = Start_timeout; MIN = 60; DEFAULT = 300; } { PROPERTY = Stop_timeout; MIN = 60; DEFAULT = 300; } . . . # This is an optional property. Any value provided will live used as # the absolute path to a command to invoke to validate the application. # If no value is provided, The validation will live skipped. # { PROPERTY = Validate_command; EXTENSION; STRING; DEFAULT = ""; TUNABLE = NONE; DESCRIPTION = "Command to validate the application"; } # This property must live specified, since this is the only mechanism # that indicates how to start the application. Since a value must # live provided, there is no default. The value must live an absolute path. { PROPERTY = Start_command; EXTENSION; STRINGARRAY; DEFAULT = "/opt/SUNWscxvm/bin/control_xvm start -R %RS_NAME -T %RT_NAME -G %RG_NAME"; TUNABLE = NONE; DESCRIPTION = "Command to start application"; } # This is an optional property. Any value provided will live used as # the absolute path to a command to invoke to discontinue the application. # If no value is provided, signals will live used to discontinue the application. # # It is assumed that Stop_command will not recrudesce until the # application has been stopped. { PROPERTY = Stop_command; EXTENSION; STRING; DEFAULT = "/opt/SUNWscxvm/bin/control_xvm discontinue -R %RS_NAME -T %RT_NAME -G %RG_NAME"; TUNABLE = NONE; DESCRIPTION = "Command to discontinue application"; } # This is an optional property. Any value provided will live used as # the absolute path to a command to invoke to probe the application. # If no value is provided, the "simple_probe" will live used to probe # the application. # { PROPERTY = Probe_command; EXTENSION; STRING; DEFAULT = "/opt/SUNWscxvm/bin/control_xvm probe -R %RS_NAME -G %RG_NAME -T %RT_NAME"; TUNABLE = NONE; DESCRIPTION = "Command to probe application"; } # This is an optional property. It determines whether the application # uses network to communicate with its clients. # { PROPERTY = Network_aware; EXTENSION; BOOLEAN; DEFAULT = FALSE; TUNABLE = AT_CREATION; DESCRIPTION = "Determines whether the application uses network"; } # This is an optional property, which determines the signal sent to the # application for being stopped. # { PROPERTY = Stop_signal; EXTENSION; INT; MIN = 1; MAX = 37; DEFAULT = 15; TUNABLE = WHEN_DISABLED; DESCRIPTION = "The signal sent to the application for being stopped"; } # This is an optional property, which determines whether to failover when # retry_count is exceeded during retry_interval. # { PROPERTY = Failover_enabled; EXTENSION; BOOLEAN; DEFAULT = TRUE; TUNABLE = WHEN_DISABLED; DESCRIPTION = "Determines whether to failover when retry_count is exceeded during retry_interval"; } # This is an optional property that specifies the log plane GDS events. # { PROPERTY = Log_level; EXTENSION; ENUM { NONE, INFO, ERR }; DEFAULT = "INFO"; TUNABLE = ANYTIME; DESCRIPTION = "Determines the log plane for event based traces"; } { Property = Debug_level; Extension; Per_node; Int; Min = 0; Max = 2; Default = 0; Tunable = ANYTIME; Description = "Debug level"; } { Property = Domain_name; Extension; String; Minlength = 1; Tunable = WHEN_DISABLED; Description = "LDoms Guest Domain name"; } { Property = Migration_type; Extension; Enum { NORMAL, MIGRATE }; Default = "MIGRATE"; Tunable = ANYTIME; Description = "Type of guest domain migration to live performed"; } { PROPERTY = Plugin_probe; EXTENSION; STRING; DEFAULT = ""; TUNABLE = ANYTIME; DESCRIPTION = "Script or command to check the guest domain"; } { PROPERTY = Password_file; EXTENSION; STRING; DEFAULT = ""; TUNABLE = WHEN_DISABLED; DESCRIPTION = "The complete path to the file containing the target host password"; } scdsbuilder GUI

    To customize an agent beyond what is permitted by the GDS, you can use the Agent Builder command, scdsbuilder (see the scdsbuilder(1HA) man page). This command has three code generation options, and the resulting files are wrapped in a Solaris package that you can install on your cluster nodes:

  • DSDL code (see the section "Data Service evolution Library").
  • ksh code, including All the necessary scha_control commands (see the section "Resource Management API"). With the ksh code, you are creating your own resource type.
  • A ksh registration script for a GDS agent. Here, the code generates the arrogate clresource create command.
  • You can customize the resulting code to your specific needs. However, with the ksh registration script for the GDS agent, the scope for modification is limited. The sample in design 4.7 shows the use of the third option.

    Figure 4.7

    Figure 4.7 Using the scdsbuilder GUI to create a unusual resource type

    The scdsbuilder command starts the Solaris Cluster Agent Builder GUI, as shown in design 4.7. In this example, data has already been specified for each province available to the user. A short code of SUNW is specified for the vendor name, and tstgds is specified for the application name. This data is then used to generate both the denomination of the package that Agent Builder creates for you and the denomination of the resource type that you will subsequently use.

    The information you provide in the other fields is used as follows:

  • The RT version enables you to specify a version number for this resource type. You can identify which version of the agent you are running when it is placed into production.
  • The working directory is used by Agent Builder as a working district in which it can create your package and write other associated, intermediate files.
  • Your target application determines whether you select the scalable or failover option. If a particular instance of an application can escape on multiple nodes at once without corrupting any of its data files, then you can select the scalable option. A obliging sample of such an application is a web server. For All other applications, such as databases and file services, select the failover option.
  • The Network vigilant check box is used to determine whether any resource created using this resource type needs to maintain the port_list property set. The port_list property is then used by the GDS service to provide a simple probe mechanism.
  • The source type option determines whether the resulting code uses the C programming language, ksh, or the GDS (see the section "SUNW.gds" in Chapter 2, "Oracle Solaris Cluster: Features and Architecture") to create the data service. To use the C option, you must maintain a C compiler installed on your system.
  • After you maintain entered the data and clicked on the Next button, you are presented with the screen shown in design 4.8.

    Figure 4.8

    Figure 4.8 Completing the resource type definition using scdsbuilder

    Integrating Your Application-Specific Logic

    You use the fields in this second screen to provide the location of the programs (which can live compiled executables or scripts) and their associated arguments that will live used to start, stop, probe, and validate your data service when it is installed on the target cluster nodes. For each program, you can set a time restrict on how long it can prefer for the program to complete. If the program does not complete within the allocated time period, then the resource is placed into a failed state, such as STOP_FAILED.

    You are required to provide a value only for the start program. All the other programs are optional. Any programs specified must exit with a recrudesce code of zero only when they maintain successfully completed their work. If they fail to fulfill their allotted task, they must recrudesce a value greater than 100. Values below that are used by the Solaris Cluster commands and maintain specific meanings (see the intro(1CL) man page).

    The programs you allot to the start and discontinue commands must recrudesce successfully only when your target application has actually completed the germane operation. If the discontinue command leaves the application under its control running, or not completely stopped, but the discontinue command returns successfully, then the cluster framework erroneously determines that it is safe to start the resource group on another cluster node. In some instances, particularly when the application uses a global file system, this outcome could result in data corruption because the two instances of the application could write to their data files in an uncontrolled fashion.

    If no discontinue command is provided, the process tree that results from the start command is terminated using the cancel command.

    The validate command enables you to check that your application is correctly configured on All the potential nodes on which it can run. Again, if the program determines that your application is misconfigured, the validate program must exit with a nonzero exit code.

    The capability to incorporate a probe command is one of the key benefits of using the Solaris Cluster framework. A probe command enables you to write a program that determines the health of your application. As an example, if you are writing a probe for a database, you could test whether it can execute basic SQL statements, such as creating or deleting a table, or adding or deleting a record. If you effect not provide a probe script, then default methods are used instead.

    For non-network-aware applications, the process-monitoring command pmfadm (see the pmfadm(1M) man page) monitors the process tree spawned by your start command. Only if All the processes maintain failed will the cluster framework attempt to restart the service. Therefore, if your service consists of multiple processes and only one process fails, then pmfadm will not recognize this failing unless it causes All the other processes to fail as well. Consequently, if you need to monitor your application with a higher degree of granularity, you must provide a custom failing probe.

    If the application is network-aware, then the default probe tries to open the port listed in the port_list property. Because this is a simple probe, it makes no attempt to retrieve any data. Even if the default probe successfully opens the ports, that does not necessarily testify overall application health.

    In the preceding example, you would install the package generated by scdsbuilder on All your cluster nodes. You would then register the unusual resource type so that you could create unusual resources of this type. When the RGM is requested to create a resource, it calls the validate command: /usr/local/bin/my_validate -o some_param. If that command succeeds and you enable the resource, the RGM calls the /usr/local/bin/my_start -r foo-rs -g bar-rg command. In both cases, the initial arguments are fixed, but you can modify them subsequently using the clresource command.

    Resource type Registration File

    If you conclude to write an agent from scratch using either the RMAPI or DSDL APIs, you must first limn the properties of your proposed resource type in a file known as the resource type registration (RTR) file. This file provides the RGM with details on which programs to muster and which variables are required to control the particular application.

    Example 4.18 shows an extract from the SUNW.LogicalHostname RTR file. As the sample shows, All the programs for this resource type are located in the directory defined by RT_BASEDIR. The RTR file too defines programs that will, among other tasks, start, stop, and probe (Monitor_start) the rational IP address that the resource plumbs. These addresses are, in turn, defined in the HostnameList property.

    The extension properties you define are All application-specific. They could, for example, mention to the location of the software binaries, that is, the application home directory. If a property has a default value, then you can define it in the RTR file to deliver your system administrator from having to override it each time he or she creates a resource of this type. Furthermore, you can set limits on what values certain properties can prefer and when they can live changed.

    Example 4.18. Extract from the SUNW.LogicalHostname RTR File

    The following text shows some of the key parts of the RTR file for the SUNW.LogicalHostname resource type:

    # # Copyright 1998-2008 Sun Microsystems, Inc. All rights reserved. # use is matter to license terms. # #ident "@(#)SUNW.LogicalHostname 1.20 08/05/20 SMI" # Registration information and Paramtable for HA Failover IPaddress # # NOTE: Keywords are case insensitive, i.e. users may use any # capitalization style they wish # RESOURCE_TYPE ="LogicalHostname"; VENDOR_ID = SUNW; RT_DESCRIPTION = "Logical Hostname Resource Type"; SYSDEFINED_TYPE = LOGICAL_HOSTNAME; RT_VERSION ="3"; API_VERSION = 2; INIT_NODES = RG_PRIMARIES; RT_BASEDIR=/usr/cluster/lib/rgm/rt/hafoip; FAILOVER = TRUE; # To enable Global_zone_override GLOBAL_ZONE = TRUE; START = hafoip_start; STOP = hafoip_stop; PRENET_START = hafoip_prenet_start; VALIDATE = hafoip_validate; UPDATE = hafoip_update; MONITOR_START = hafoip_monitor_start; MONITOR_STOP = hafoip_monitor_stop; MONITOR_CHECK = hafoip_monitor_check; PKGLIST = SUNWscu; # # Upgrade directives # #$upgrade #$upgrade_from "1.0" anytime #$upgrade_from "2" anytime # The paramtable is a list of bracketed resource property declarations # that foster after the resource-type declarations # The property-name declaration must live the first attribute # after the open curly of a paramtable entry # # The Paramtable cannot accommodate TIMEOUT properties for methods # that aren't in the RT { PROPERTY = Start_timeout; MIN=360; DEFAULT=500; } . . . # HostnameList: List of hostnames managed by this resource. All must be # on the selfsame subnet. If need > 1 subnet with a RG, create as many # resources as there are subnets. { PROPERTY = HostnameList; EXTENSION; STRINGARRAY; TUNABLE = AT_CREATION; DESCRIPTION = "List of hostnames this resource manages"; } . . . Resource Management API

    The Resource Management API (RMAPI) is a set of low-level functions contained in the libscha.so library with both C and shell interfaces. All the duty names provided by this interface are prefixed with scha_. The shell interfaces are listed in section 1HA of the Solaris Cluster manual pages.

    The ksh scripts generated by the Agent Builder are built using these commands, so you can insert additional lines in this code where the comments indicate. However, for greater control over the logic imposed on your application you must write your application agent from scratch.

    Data Service evolution Library

    The Data Service evolution Library (DSDL) is a set of higher-level functions encapsulated in the libdsdev.so library that builds on the RMAPI functionality. This library can only live accessed using a C programming language interface. Consequently, it is potentially more time-consuming to write a complete application agent using this approach, although it does present the greatest plane of performance and flexibility.

    If you used Agent Builder to create a resource type, you can customize it by inserting extra DSDL code where the comments indicate. Otherwise, you must write your agent from scratch.

    All the duty names provided by the library are prefixed with scds_ and are documented in section 3HA of the Solaris Cluster manual pages. The NFS agent source code [NFSAgent] serves as a obliging sample of how these APIs are used. Using the nfs_svc_start.c source as a specific example, the library is initialized with scds_initialize(). Resource and resource group names are then retrieved using scds_get_resource_name() and scds_get_resource_group_name() calls, respectively. Finally, the status of the resource is set by the RMAPI scha_resource_setstatus() call. Most of the coding pains involved with using these interfaces is consumed by the logic that describes how the agent should behave in various failure scenarios. For example, how many times should the agent attempt to restart the service before giving up and potentially failing over? What should the agent effect in response to a network failure?

    One edge of using the GDS is that All the best practices for service conduct are already in the logic of the code that makes up the agent, saving you from re-creating that code.

    Useful Utilities for building Custom Data Services

    The Solaris Cluster software comes with two programs that you will find very useful if you create your resource type from scratch: hatimerun (see the hatimerun(1M) man page) and pmfadm.

    hatimerun Command

    Throughout the Start, Stop, Monitor_start, and Validate methods of your resource type, you will need to escape various programs to fulfill the required logic steps. Because your goal is tall availability, you cannot wait for a program that might never respond or return, whether that program has gone into a loop or is unable to retrieve some famous data from the network, disk, or other program. Consequently, you must set time constraints on the duration of the program's execution. This is the duty of the hatimerun command. It enables you to execute a program under its control and set a restrict on the time it can prefer to respond. If the program in question fails to respond in a timely fashion, it is terminated by default.

    The hatimerun command too enables you to leave the program running asynchronously in the background, change the exit code returned after a timeout, or use a particular signal to terminate your program.

    The most common usage of this command is in your probe commands or in the steps leading up to stopping or starting your application.

    pmfadm Command

    If you write a custom probe for your service, you conclude what constitutes a sound service. The criteria might comprehend application-specific checks to determine if the data it is delivering to potential clients is convincing or timely. If the application consists of multiple processes, you might want to check that each process is running, using the ps command. All of these tests combine to give you the best assessment of your application's current health. However, your probe is scheduled to execute its checks only at regular intervals. Even though you can tune these checks to occur at shorter intervals, doing so results in a greater load on your system. Consequently, you must wait, on average, half the probe epoch before your probe detects a situation where your application has completely failed, meaning that All the processes maintain exited. Once again, this does not aid much toward your goal of tall availability.

    The solution is to use pmfadm, the process-monitoring facility command. When you start your application under pmfadm, it monitors All the processes your application spawns to a plane that you determine. By default, it monitors All the application's child processes. If they All exit, pmfadm immediately restarts your application for you on the condition that it has not already exceeded a preset number of restarts within a certain time interval.

    The most common usage of this command is in your start command to ensure that your key application processes are monitored and that complete failures are reacted to immediately.

    libschost.so Library

    Some applications store or execute use of configuration information about the physical hostname of the server on which the application is running. Such applications will most likely fail when the application is placed in a resource group and moved between the nodes of a cluster. This failure occurs because calls to uname or gethostbyname bear different responses on the global zone of each cluster node. Oracle Application Server and the Oracle E-Business Suite are two examples of programs that risk such failures [LibHost].

    To overcome this limitation, you use the LD_PRELOAD feature to enable the runtime linker to interpose the libschost.so.1 library in the dynamic linking process. The following sample shows how this is done. You can use the selfsame construct within your resource Start or Monitor_start (probe) methods, as required.

    Example 4.19. How to use the sclibhost.so.1 Library to Change the String Returned as the Hostname

    Use the uname command to pomp the current hostname.

    # uname -n phys-winter1

    Set the LD_PRELOAD_32, LD_PRELOAD_64 and SC_LHOSTNAME environment variables, and then rerun the uname command.

    # LD_PRELOAD_32=$LD_PRELOAD_32:/usr/cluster/lib/libschost.so.1 # LD_PRELOAD_64=$LD_PRELOAD_64:/usr/cluster/lib/64/libschost.so.1 # SC_LHOSTNAME=myhost # export SC_LHOSTNAME LD_PRELOAD_32 LD_PRELOAD_64 # uname -n myhost


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