Oracle Server 64-bit fails when invoked from InstallShield

I'm trying to install the Oracle Server 64-bit on Windows 2008 SP1 from the InstallShield 2010.
The installation is silent. Invoked by command line:
J:\Oracle_11.2.0_x64\OracleServer_11.2.0.1_x64\setup.exe ORACLE_HOME_NAME="ARAXI_11" -silent -nowelcome -force -nowait -noconsole -loglevel fine -noconfig -ignoreSysPrereqs use_prereq_checker=false -responseFile C:\Oracle\11.2.0\installation\scripts\SVRCUSTOM11.2.0.rsp
The problem is that when the command is invoked from command line (cmd), the installation is successful.
However, when the same command is invoked from under the InstallShield, the installation fails on Architecture requirement check:
INFO: *********************************************
INFO: Architecture: This is a prerequisite condition to test whether the system has a certified architecture.
INFO: All forked task are completed at state performChecks
INFO: Completed background operations
INFO: Moved to state <performChecks>
INFO: Waiting for completion of background operations
INFO: Completed background operations
INFO: Validating state <performChecks>
INFO: Using default Validator configured in the Action class oracle.install.ivw.db.action.PrereqAction
INFO: Adding ExitStatus PREREQUISITES_NOT_MET to the exit status set
SEVERE: [FATAL] [INS-13013] Target environment do not meet some mandatory requirements.
CAUSE: Some of the mandatory prerequisites are not met. See logs for details. C:\Oracle\Inventory\logs\installActions2011-05-19_12-58-13PM.log
ACTION: Identify the list of failed prerequisite checks from the log: C:\Oracle\Inventory\logs\installActions2011-05-19_12-58-13PM.log. Then either from the log file or from installation manual find the appropriate configuration to meet the prerequisites and fix it manually.
INFO: Advice is ABORT
INFO: Adding ExitStatus INVALID_USER_INPUT to the exit status set
The questions:
1. Why the requirement checks give different results when installation is invoked from CMD and from InstallShield?
2. Why the requirement checks are done despite the parameters "-ignoreSysPrereqs" and "use_prereq_checker=false"?
3. What should I do to get the installation pass (either remove the check or make it satisfying)?
PS. The 32 bit Oracle Server installation on Windows 2003 works without problem when invoked from InstallShield.

Please use 2008R2 if you want to install 11gR2 versionThank you for that update. Possibly it will help me to solve another trouble.
Regarding the problem I described, the issue is that I install Oracle Client 32 bit prior to trying to install Oracle Servier 64 bit.
The Oracle Client setup had started RemoteExecService.exe 32 bit process. And the process remained running after the installation completed.
The Oracle Server setup utilizes the running RemoteExecService.exe process. Since the process is 32 bit, the architecture requirement check had failed.
I've added to my script killing the process
taskkill /F /IM RemoteExecService.exe
before invoking the Oracle Server installation.
That way the Oracle Server setup starts another RemoteExecService.exe process and the new process is 64 bit.
The architecture requirement succeed.

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    6150 terminals were simulated to produce 618 TPC-A transactions.
    Thus, terminal concentration accounts for a large portion of the total
    processing time used.
    First, let's look at how the Multi Threaded Server would work for
    this benchmark. In this case, there are many client processes,
    but only a few server processes, which handle client requests on a
    first-come first serve basis. When they are done with a request,
    they take another client's request.
    | Client | | Server |
    | __________ |______________|_____ _____________ _____________ |
    | | Client | | SQL*Net | |_|Dispatcher | | | |
    | | Process| | | ____| Process |___| | |
    | |________| | | | __|___________| | | |
    |____________| | | | | | | | |
    | | | | | | Oracle7 | |
    ______________ | | | __|__|____ | Server | |
    | Client | | | | __|_|_____ | | | |
    | __________ | | | | | Shared | |____| | |
    | | Client | | SQL*Net | | | | Server |_|____| | |
    | | Process|_|______________|__| | | Process|_| | | |
    | |________| | | | |________| |___________| |
    |____________| | | |
    | | |
    ______________ | | |
    | Client | | | |
    | __________ | | | |
    | | Client | | SQL*Net | | |
    | | Process|_|______________|____| |
    | |________| | | |
    |____________| | |
    Client processes = N Dispatcher processes >= 1
    Shared server processes >= 1
    If there are 500 clients in this environment, there will be one or more
    dispatcher processes, dynamically tunable, and one or more shared
    server processes, dynamically tunable, on the server. The reduction
    in the total number of processes handled by the server system
    results in more processing time available for RDBMS activity. Thus
    higher RDBMS transaction throughput can be obtained on the
    server system.
    But the problem for the TPC-A, and for certain large customer
    configurations, is not the only ability of the Oracle Server to
    process transactions, but also the ability of the operating
    system to handle huge numbers of incoming connections.
    There is one incoming connection for each client. Most UNIX
    operating systems have a limit on how many such connections they can
    handle. Even if a particular operating system allows a large number of
    connections, each takes some amount of overhead to manage.
    In order to service all 6150 terminals, we selected a 3-tier hardware
    environment where the middle tier, using a TPM, acted as a terminal
    concentrator. The high-end TPC-A architecture looked like the following.
    The Application Servers, which contain the Pro*C statements used to
    perform the transaction also run on the terminal concentrator machine
    in order to offload as much work from the database serve as possible.
    They send the compiled SQL over SQL*Net to the Oracle7 Server processes.
    | Client | | Terminal | | Server |
    | ________ | | Concentrator | | |
    | | Client | |TPM | | | |
    | | Process|_|_____|__ _____ | | |
    | |________| |Comm | | | | | | |
    |____________| | | | | | | |
    | |__| | | | |
    ____________ | | TPM | | | |
    | Client | | ___| | _______ | | ________ _______ |
    | ________ | | | | |_| |__|_______|__| Oracle | | | |
    | | Client | |TPM | | | | |Appl. | |SQL*Net| | Server |__| | |
    | | Process|_|_____|_| |_____| |Server | | | | Process| | | |
    | |________| |Comm | |_______| | | |________| | | |
    |____________| | | | | | |
    |_______________________| | | | |
    | | | |
    ____________ _______________________ | |Oracle7| |
    | Client | | Terminal | | |Server | |
    | ________ | | Concentrator | | | | |
    | | Client | |TPM | | | | | |
    | | Process|_|_____|__ _____ | | __________ | | |
    | |________| |Comm | | | | _______ |SQL*Net| | Oracle | | | |
    |____________| | | | |_| |__|_______|__| Server |__| | |
    | |__| | |Appl. | | | | Process| | | |
    ____________ | | TPM | |Server | | | |________| |_______| |
    | Client | | ___| | |_______| | | |
    | ________ | | | | | | | |
    | | Client | |TPM | | | | | | |
    | | Process|_|_____|_| |_____| | | |
    | |________| |Comm | | | |
    |____________| | | | |
    |_______________________| |________________________|
    Clients = 6150 Terminal concentrators = 17
    TP Monitor instances = 17
    Application server processes Oracle Server processes
    = 17*8 = 17*8
    The TPM is the software component of the terminal concentrator. In this role
    it offloads terminal handling from the the machine running Oracle Server.
    Since more than one terminal concentrator can be configured, whereas the
    database in this case had to run on a single machine, concentrator machines
    can be added until the performance of the back-end machine was optimized.
    This three-tier solution resulted in the outstanding transaction throughput
    announced with Oracle7 Server. Even with Oracle Parallel Server, it may pay
    to offload the terminal handling so that the cluster can be exclusively used
    for database operations.
    Can you summarize the performance discussion for me?
    Depending on the number of users required, different architectures may be
    used in a client/server environment to maximize performance:
    1) For a small number of users, the traditional Oracle two-task
    architecture can be used. In this case, there is a one-to-one
    correspondence between client processes and server processes. It's
    simple, straightforward, and efficient.
    2) For a large number of users, Multi Threaded Server might be a better
    approach. Although some tuning may be required, Multi Threaded Server
    can handle a relatively large number of users for each machine size
    compared to the traditional Oracle approach. Using this approach,
    customers will be able to handle many hundreds of users on many
    platforms. Furthermore, current Oracle applications can move to this
    environment without change.
    3) For a very large number of users, where transactions are simple and
    terminal input concentration is the overriding performance issue, a
    3-tier architecture incorporating a TPM may be useful. In this case,
    terminal concentration is handled by the TPM in the middle tier. As
         you might expect, it is a more complex environment requiring more
         system management. For existing Oracle customers, significant Oracle
    application modifications will be required.
    Oracle provides all of these choices.
    Performance using Oracle's XA Library
    Are there any performance implications to using the XA library (in other
    words, to using TPM-managed transactions)?
    (1) The XA library imposes some performance penalty. You should use
    TPM-managed transactions only if you actually need them. Even if you
    are getting the one-phase commit optimization, the code path is
    longer because we need to map back and forth between external
    formats and internal ones. Also, prior to 7.1, XA requires you
    to release all cursors at the end of a transaction, which results
    in extra parsing. Even with shared cursors, there is time spent
    looking up the one you need and re-validating it. This has been
    improved for 7.1.
    (2) If you need to use two-phase commit, this will incur additional cost
    since extra I/Os are required. If you do need 2PC, you need to account
    for that when sizing the application.
    (3) Although some TPMs allow parallel execution of services (such as Tuxedo's
    "tpacall"), this will not normally enhance performance unless different
    resource managers are being used. In fact, Oracle Server must serialize
    accesses to the same transaction by the same Oracle instance, and the
    block/resume code will in fact degrade performance in that case compared
    to running the services sequentially.

    the role is the same on all plattforms. the reports server takes requests for running reports, spawns an engine that executes the request. in addition to that, the server also provides scheduling services and security features for the reports environment.
    the oracle reports team

  • How to run a script on Oracle server from isqlplus

    Hi I am trying to run a script on my workstation from Oracle server through isqlplus workarea. I entered following command and get the following error. i have enabled isqlplus URL by editing web.xml file already. Can please someone help how to run the script?
    SP2-0920: HTTP error 'page not found (505)' on attempt to open URL

    So far, you haven't specified your rdbms version and isqlplus behaved differently on a 9iR1, 9iR2 from the one release on 10gR1/R2. on 9i it was a servlet based on a JServ servlet executor machine, meanwhile on 10g it is a J2EE compliant application deployed on an OC4J container, so configuration is different.
    You may want to take a look at these references -->
    * Starting iSQL*Plus from a URL
    * Creating Reports using iSQL*Plus
    ~ Madrid


    작성날짜 : 2002-05-17
    Subject: Oracle Server and UNIX Transaction Processing Monitors - 1
    This file contains commonly asked questions about Oracle Server and UNIX
    Transaction Processing Monitors (TPMs). The topics covered in this article are
         o What is a Transaction Processing Monitor (TPM)?
         o What is the X/Open Distributed Transaction Processing Model?
         o How does the Oracle Server works with TPMs?
         o How should I position TPMs with my customer?
         o What Oracle products must a customer purchase?
         o Where can my customer purchase a TPM?
         o Availability and packaging
    Explanation & Example
    What is a Transaction Processing Monitor?
    Under UNIX, a Transaction Processing Monitor (TPM) is a tool that coordinates
    the flow of transaction requests between front-end client processes that issue
    requests and back-end servers that process them. A TPM is used as
    the "glue" to coordinate transactions that require the services of several
    different types of back-end processes, such as application servers and
    resource managers, possibly distributed over a network.
    In a typical TPM environment, front-end client processes perform screen
    handling and ask for services from back-end server processes via calls to the
    TPM. The TPM then routes the requests to the appropriate back-end server
    process or server processes, wherever they are located on the network. Through
    configuration information, the TPM knows what services are available and where
    they are located. Generally, the back-end server processes are specialized so
    that each one handles one type of requested service. The TPM provides
    location transparency as well and can send messages through the network
    utilizing lower-level transport services such as TCP/IP or OSF DCE.
    The back-end servers process the requests as necessary and
    return the results back to the TP monitor. The TP monitor then routes
    these results back to the original front-end client process.
    A TPM is instrumental in the implementation of truly distributed processing.
    Front-end clients and back-end processes have no knowledge of each
    other. They operate as separate entities, and it is this concept that provides
    flexibility in application development. Front-end and back-end processes are
    developed in the UNIX client-server style, with each side optimized for its
    particular task. Server functionality can be deployed in stages, which makes
    it easy to add functionality as needed later in the product cycle. It also
    makes it easy to distribute both the front-end and back-end processes
    throughout the network on the most appropriate hardware for the job. In
    addition, multiple back-end server processes of the same type might be
    activated to handle increasing numbers of users.
    What is the X/Open Distributed Transaction Processing Model?
    The X/Open Transaction Processing working group has been working
    for several years to establish a standard architecture to implement
    distributed transaction processing on open systems. In late 1991,
    X/Open published the initial Distributed Transaction Processing (DTP)
    model specification and defined the first of several interfaces that
    exist between the components of the model. Subsequently, other publications
    and a revised model specification have been published.
    An important function of the TPM in the X/Open DTP model is the
    synchronization of any commits and rollbacks that are required to complete
    a distributed transaction request. The Transaction Manager (TM) portion
    of the TPM is the entity responsible for ordering when distributed commits
    and rollbacks will take place. Thus, if a distributed application program
    is written to take advantage of the TM portion of the TPM, then it,
    and not the DBMS, becomes responsible for enabling the two-phase commit
    process. Article 2 has more detail on this model.
    How does the Oracle Server work with TPMs?
    When a TPM is used without invoking an X/Open TM component to manage the
    transactions, Oracle Server needs no special functionality. The transaction
    will be managed by Oracle itself. However, when the TPM X/Open TM component
    is used to manage the transaction, the Oracle Server, that is the Oracle DBMS,
    acts as a Resource Manager--a type of back-end process. In the case of
    TPM-managed transactions, the TM needs a way to tell the RMs about the stages
    of the transaction. This is done by a standard, X/Open defined interface
    called XA. Article 2 of of this document gives more information about both
    the X/Open model and Oracle7's use of XA.
    Because the XA interface provides a standard interface between the TM and the
    resource manager, it follows that the TM can communicate with any XA-compliant
    resource manager (e.g., RDBMS), and, conversely, that a resource manager can
    communicate with any XA-compliant TM. Thus, the Oracle Server, beginning with
    Oracle7, works with any XA-compliant TM.
    How should I position TPMs with my customer?
    There's been a great deal of confusion about the need for TPM technology. Some
    software suppliers, most notably IBM, will assert that a TPM like CICS is a
    necessary requirement for high volume OLTP. Other vendors will assert that
    there is seldom a need for such technology. And yet others promote TPMs as
    providers of higher transaction throughput.
    From Oracle's standpoint, customers might choose TPM technology under any of
    the following conditions:
    1. For heterogeneous database access, especially for 2PC capability
         This means that a TPM can be used to coordinate 2PC between Oracle
         DBMS and any other XA-compliant database, such as Informix. This
         does NOT provide SQL heterogeneity - SQL calls to Oracle DBMS may be
         different than SQL calls to Informix. The TPM handles the routing,
         communication, and two-phase commit portion of the transaction, but
         does not translate one type of SQL call into another.
    2. For transaction monitoring and workload control
         The leading TPMs supply tools to actively manage the flow of
         transactions between clients and servers and to load balance the work
         load across all available processors on a network, not just on a
         single multi-processor system. Some TPMs also have the ability to
         dynamically bring up additional back-end services during peak work
    3. For more flexible application development and installation
         One of the key features of the DTP model is application modularity.
         Modularity, that is, the decomposition of a large program into small,
         easily defined, coded and maintained "mini-programs" makes it easy to
         add new functionality as needed. Modularity also makes it much easier
         to distribute the front-end and back-end processes and the resource
         managers across hardware throughout a network.
    4. For isolating the client from details of the data model
    By using the service oriented programming model, the client program
         is unaware of the data model. The service can be recoded to use a
         different one with no change to the client. To get this advantage,
         the application developer must explicitly code the server and client
         to fit the service model.
    5. For connection of thousands of users
         TP Monitors, because of their three-tier architecture, can be used
         to connect users to an intermediate machine or machines, removing
         the overhead of handling terminal connections from the machine
         actually running the database. See Article 4 for more information.
    There are also several cases where TPM technology is not the right answer.
    These include:
    1. If the customer is simply looking for a performance improvement
         The customer may have heard a theory that "higher performance
         is possible for large scale applications only if they use a
         TP monitor". First, no performance gain can be achieved for
         existing applications; in fact, they won't even run under a TP
         Monitor without recoding. Second, performance improvements have
         only been documented for large numbers of users, and "large"
         means many hundreds or thousands. Without a TP Monitor,
         Oracle Server can handle several hundred users with its normal
         two-task architecture and several times that using the Multi
         Threaded Server. For more on performance, see Article 4.
    2. If the customer has made large investment in his existing Oracle
         TP monitor applications must be designed from the ground up to take
         advantage of TP monitor technology. Current Oracle customers will find
         it difficult to "retrofit" a TP monitor to their existing applications.
         The Multi Threaded Server, on the other hand, allows the use of
         existing Oracle applications without change.
    3. If the customer is committed to the Oracle tool set
         Currently, none of Oracle's front-end tools (Oracle Forms, etc.) is
         designed to work with TP monitors. It is possible to invoke a
         TP Monitor by using user exits. However, the fact that the TP
         Monitor model hides the data model from the client means that only
         the screen display parts of Forms can be used, not the automatic
         mapping from screen blocks to tables.
    4. If the customer does not have a staff of experienced software engineers
         This is still very young technology for UNIX. There is not a lot of
    knowledge in the industry on how to build TP monitor applications or
    what techniques are most useful and which are not. Furthermore,
         integrating products from different vendors, even with the support
         of standard interfaces, is more complex than deploying an integrated
         all-Oracle solution. Because TP monitor technology is fairly
         complex, we recommend that you let the TP monitor supplier promote
         the virtues of their technology and differentiate themselves from
         their competitors.
    What Oracle products must a customer purchase?
    If your customer is only interested in building Oracle-managed TP Monitor
    transactions, the only Oracle products required are the Oracle Server
    and the appropriate Oracle precompiler for whatever language the
    application is being written in--most likely C or Cobol. If TPM-managed
    transactions are required, the Oracle7 Server with the distributed option
    is also required. SQL*Net is optional because the TPM takes care of the
    network services. Article 2 describes when you would choose to have the TP
    Monitor manage the transactions.
    Where can my customer purchase a TPM?
    There are many vendors offering the UNIX TPM products. (Oracle does not
    relicense TPMs.) Information on the most well known products is provided
    The following support XA:
    Product & Vendor     FCS          Known OS/Platform Ports
    "TUXEDO System/T"     1986          UNIX SVR4 & SVR3: Amdahl, AT&T,
    UNIX System Laboratories          Bull, Compaq, Dell, Fujitsu, ICL,
    190 River Road                    Motorola, Olivetti, Pyramid,Sequent,
    Summit, NJ 07901               Sun, Toshiba, Unisys, NCR, Stratus
                             Other: IBM AIX, HP/UX, DEC Ultrix
    "TOP END"      1992          UNIX SVR4: NCR
    NCR Corporation
    1334 S. Patterson Blvd.
    Dayton, OH 45479
    "ENCINA"          1992          IBM AIX, HP, Sun (SunOS and Solaris)
    Transarc Corporation               Other: OS/2, DOS, HP-UX, STRATUS
    707 Grant Street (Depends on DCE)
    Pittsburgh, PA 15219
    "CICS/6000" 1993          AIX: IBM
    IBM Corporation                    (Depends on DCE)
    "CICS 9000" 1994          HP-UX
    The following do not currently support XA:
    Product & Vendor     FCS          Known OS/Platform Ports
    "VIS/TP"          unknown          unknown
    VISystems, Inc.
    11910 Greenville Avenue
    Dallas, TX 75243
    "UniKix"          1990          UNIX: ARIX, AT&T, NCR, Pyramid,
    UniKix                     Sequent, Sun, Unisys      
    "MicroFocus           1993          SCO Unix, AIX
    Transaction System"
    Micro Focus
    26 West Street
    Newbury RG13 1JT
    There are also several third parties who are reselling the products listed
    In addition, Groupe Bull, Digital, Siemens-Nixdorf, and several other hardware
    vendors are planning to redesign their proprietary TPMs to be XA-compliant and
    suitable for use on UNIX systems.
    Availability and Packaging
    On what platforms is the XA Library available?
    Oracle provides the XA interface with Oracle7 Server on all platforms that
    support an XA-compliant TPM. Support for XA is included as part of the
    Oracle7 Server distributed option and has no extra charge in and of itself.
    Which version of XA does Oracle Server support?
    Oracle7 Server supports the Common Application Environment (CAE) version of
    XA, based on the specification published by X/Open in late 1991. It will
    require that the TM also be at that level. This means Tuxedo /T version 4.2,
    for example.
    Oracle Server supports all required XA functions. There are some optional
    features Oracle Server does not support, such as asynchronous operation.
    None of those options affect application programming.
    Page (2/4)
    This file contains commonly asked questions about Oracle Server and UNIX
    Transaction Processing Monitors (TPMs). The topics covered in this article are
         o Oracle Server Working with UNIX TPMs
         o TPM Application Architecture
    The questions answered in part 2 provide additional detail to the information
    provided in part 1.
    Oracle Server Working with UNIX TP Monitors
    Do I need XA to use Oracle Server with TPMs? If I don't use it, what are
    the consequences?
    There are a number of real applications running today with Oracle Server and
    TPMs but not using XA. To use a TPM with Oracle without using XA, the user
    would write an "application server" program which could handle one or more
    "services". For example, a server program might handle a service called
    "debit_credit". The key requirement is that the entire transaction,
    including the "commit work", must be executed within a single service. This
    is the restriction which XA will remove, as we'll see later. Each
    server process can serially handle requests on behalf of different clients.
    Because a server process can handle many client processes, this can
    reduce the total number of active processes on the server system,
    thereby reducing resource requirements and possibly increasing overall
    When Oracle is used with a TPM in this mode, we call it an Oracle-managed
    transaction since the transaction commit or rollback is done with a SQL
    What is XA? How does XA help Oracle7 work with UNIX TPMs?
    XA is an industry standard interface between a Transaction Manager and a
    Resource Manager. A Resource Manager (RM) is an agent which
    controls a shared, recoverable resource; such a resource can be
    returned to a consistent state after a failure. For example, Oracle7 Server
    is an RM and uses its redo log and undo segments to be able to do this.
    A Transaction Manager (TM) manages a transaction including the
    commitment protocol and, when necessary, the recovery after a failure.
    Normally, Oracle Server acts as its own TM and manages its own commitment
    and recovery. However, using a standards-based TM allows Oracle7 to
    cooperate with other heterogeneous RMs in a single transaction.
    The commonly used TPMs include a TM component for this purpose. In order to
    use the TM capability of the TPM rather than Oracle7's own transaction
    management, the application uses a transaction demarcation API (called TX)
    provided by the TPM rather than the SQL transaction control statements (e.g.
    "commit work"). For each TX call, the TM then instructs all RMs, by the
    appropriate XA commands, to follow the two-phase commit protocol. We
    call this a TPM-managed transaction.
    The following picture shows these interfaces within a monolithic application
    program model. This is the model most commonly described in the
    DTP literature. We'll see later what the picture looks like when we add
    Oracle7 and when we switch to a modularized client-server application
    program model.
              | |
              | |
              | Application Program (AP) |
              | |
              | |
                   | | |                    |
    Resource Manager API | | | |
    (e.g. SQL) -----|--|------------- | TX API
              | | v |          |
              --------|-------------     |          |
              | v | | v
         ---------------------- | | --------------------
         | | | | | |
         | Resource | | |<----->| Transaction |
         | Managers | |--- | Manager |
         | (RMs) | |<-------->| (TM) |
         | |--- | |
         | |<----------->| |
         ---------------------- XA --------------------
    The XA interface is an interface between two system components, not
    an application program interface; the application program does
    not write XA calls nor need to know the details of this interface.
    The TM cannot do transaction coordination without the assistance of
    the RM; the XA interface is used to get that assistance.
    How does the DTP Model support client-server?
    The above picture was actually simplified to make it easier to explain
    the role of XA. In a true distributed transaction architecture, there
    are multiple applications, each with an Application Program, a Resource
    Manager, and a Transaction Manager. The applications communicate by
    using a Communication Resource Manager. The CRM is generally provided
    as a component of the TPM. It includes the transaction information when
    it sends messages between applications, so that both applications can
    act of behalf of the same transaction. The following picture
    illustrates this:
    Client Application
    | AP |
    ||| | |
    SQL ||| | TX | CRM
    ||V V | API
    -||-- ----- |
    | |V | | | V
    --|-- |<---| | -----
    | V || | | | |
    ----- |<----| TM |<-->| CRM |
    | || | |XA+ | |
    | RMs |<-----| | -----
    | | XA | | A
    ----- ----- | Server Application
    | -----------------------------
    | | AP |
    | -----------------------------
    | ||| | |
    | SQL ||| | TX | CRM
    | ||V V | API
    | -||-- ----- |
    | | |V | | | V
    | --|-- |<---| | -----
    | | V || | | | |
    | ----- |<----| TM |<-->| CRM |
    | | || | |XA+ | |
    | | RMs |<-----| | -----
    | | | XA | | A
    | ----- ----- |
    | |
    | |
    -------- |
    / |
    / |
    / |
    Most TP Monitor products include both a TM and a CRM, and also provide
    additional functions such as task scheduling and workload monitoring.
    What is XA+? What does Oracle need to do to comply with it?
    XA+ is an interface that lets the X/Open model actually be distributed
    because it allows a communication resource manager to tell a TM on the
    server that a message from a client just came in for a particular
    transaction. Oracle is not currently planning to provide an X/Open
    communication resource manager, so we don't have any plans right now
    to do XA+. Version 2 of the DTP model paper from X/Open describes it.
    The status of the current XA+ specification is "snapshot".
    When would I choose an Oracle-managed transaction vs a TPM-managed
    Oracle Server is very efficient at managing its own transactions. If
    the TPM manages the transaction, in general some additional overhead
    will be incurred.
    The two main reasons a customer might prefer to use a TPM-managed
    transaction are as follows:
    (1) He may need to update RMs from different vendors. Experience so far
    has been that the most common case is wanting to update both Oracle and
    a TP Monitor managed resource such as a transactional queuing service
    in the same transaction (see Article 3).
    (2) He may want to use the model of having several different services in
    a transaction, even to the same database. For example, the
    "debit_credit" service could be split into a "debit" service and a
    "credit" service. This is a very attractive model, but this type of
    modularity does exact a performance penalty (see Article 4).
    Can I get a version of XA to run on Oracle Server version 6?
    No, the XA functionality uses two underlying mechanisms in the Oracle
    Server which are not available in version 6: two-phase commit and
    session switching. The upi calls for these functions do not not exist
    in version 6.
    When would I use XA vs Oracle7 to coordinate all-Oracle distributed
    Generally speaking, Oracle Server should be used to coordinate all-Oracle
    distributed transactions. The main reason for using XA to coordinate
    transactions would be that you want to use the TP Monitor service-oriented
    architecture. That is, you would like to construct an application built of
    services and service requests in order to benefit from the modularity and
    workload control such an environment provides.
    TP Monitor Application Architecture
    What might a TP Monitor application look like?
    Most TPM applications will consist of two more more programs, where
    there are front-end client programs which request services and back-end
    server programs which provide services. In this case, the TPM supplies an
    additional capability which is transactional communication. The client
    describes the boundaries of the transaction, through the use of the TX API,
    and the TPM relays that transaction information to each requested service.
    The overall application structure generally looks like the following in the
    client-server model. The "TP Monitor Services" box is not necessarily a
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