Personalization Server and DBMS

Hi,
Have someone tried to install the Personalization Server with container
managed persistence (cmp) in another DB than Cloudscape ??? Can the
Personalization Server be installed with Oracle and cmp ?
And for instance MS SQL Server ?
Thanks in advance,
Helder

You can mix CMP and BMP beans. You could deploy the various
personalization server related beans as bmp and then use CMP for the
components.
Jeff Wang
WLCS 2.0 Software Engineer
helder alexandre wrote:
>
Hi,
What I would like to do is the deployment with MS SQL Server with cmp.
But I think it isn't possible because for the personalization server there isn't
the -bmp- version of the jars, if you check the weblogic-cmp.properties and
weblogic-bmp.properties for the personalization server are deployed the same
jars.
I've made some research and find out that the jars are the same and that the
beans of usermanagemet are always bmp.
Thanks.
Helder
Mike Horn wrote:
there should be an oracle script in welogiccommerce\db\oracle that you can
use to create the database; then set your deployment set to BMP and make
sure that the ejb jars that you deploy are the -bmp- version
"helder alexandre" <[email protected]> wrote in message
news:[email protected]..
I will follow this question in w.d.interest.commerce.
But the same applies to MS SQL Server, because we have a driver jdbc forthat
dmbs ?
Thank You.
Helder
Jeff Wang wrote:
repeated from a post I made on tuesday in the w.d.interest.commerce
newsgroup:
I would suspect that the easiest way to do CMP in oracle is to take the
Cloudscape SQL file, and change all the serialized data types to
BLOBs... Not having personally done it, I don't know how painful it is
to do, but CMP should work relatively fine. Of course, if you have your
own data-mapping, that would be great too. There's nothing stopping you
from doing CMP on Oracle, other than the data schema, that is...
Jeff Wang
WLCS 2.0 Software Engineer
helder alexandre wrote:
Hi,
Have someone tried to install the Personalization Server with
container
managed persistence (cmp) in another DB than Cloudscape ??? Can the
Personalization Server be installed with Oracle and cmp ?
And for instance MS SQL Server ?
Thanks in advance,
Helder

Similar Messages

  • Personalization Server And  XML Parsers

    hello there,
    I am a new user of Weblogic commerce suite 2.0.
    WE want to develop a portal by using above mentioned S/W. We want to get news from Reuters(which is XML data) and want to show it on our page. For this purpose do we need a XML parser or WLCS has in built support for this ????
    Regards
    abhishek d

    You can mix CMP and BMP beans. You could deploy the various
    personalization server related beans as bmp and then use CMP for the
    components.
    Jeff Wang
    WLCS 2.0 Software Engineer
    helder alexandre wrote:
    >
    Hi,
    What I would like to do is the deployment with MS SQL Server with cmp.
    But I think it isn't possible because for the personalization server there isn't
    the -bmp- version of the jars, if you check the weblogic-cmp.properties and
    weblogic-bmp.properties for the personalization server are deployed the same
    jars.
    I've made some research and find out that the jars are the same and that the
    beans of usermanagemet are always bmp.
    Thanks.
    Helder
    Mike Horn wrote:
    there should be an oracle script in welogiccommerce\db\oracle that you can
    use to create the database; then set your deployment set to BMP and make
    sure that the ejb jars that you deploy are the -bmp- version
    "helder alexandre" <[email protected]> wrote in message
    news:[email protected]..
    I will follow this question in w.d.interest.commerce.
    But the same applies to MS SQL Server, because we have a driver jdbc forthat
    dmbs ?
    Thank You.
    Helder
    Jeff Wang wrote:
    repeated from a post I made on tuesday in the w.d.interest.commerce
    newsgroup:
    I would suspect that the easiest way to do CMP in oracle is to take the
    Cloudscape SQL file, and change all the serialized data types to
    BLOBs... Not having personally done it, I don't know how painful it is
    to do, but CMP should work relatively fine. Of course, if you have your
    own data-mapping, that would be great too. There's nothing stopping you
    from doing CMP on Oracle, other than the data schema, that is...
    Jeff Wang
    WLCS 2.0 Software Engineer
    helder alexandre wrote:
    Hi,
    Have someone tried to install the Personalization Server with
    container
    managed persistence (cmp) in another DB than Cloudscape ??? Can the
    Personalization Server be installed with Oracle and cmp ?
    And for instance MS SQL Server ?
    Thanks in advance,
    Helder

  • Personalization Server and Clustering

    Hi:
    Is anyone running the Personalization server in a clustered enviroment.
    Thank You
    David L. Wasler
    [email protected]

    Hi David,
    Our developers and QA have run it in a clustered environment when we
    certified the WLCS 2.0.1 release for clustering, but perhaps someone in the
    field would like to share their experiences?
    Ture Hoefner
    BEA Systems, Inc.
    1655 Walnut Street; suite 200
    Boulder, CO 80302
    www.beasys.com

  • Need api docs for personalization server and 5.1 server

    Hi,
    I can't seem to find the javadocs for the apis described above...can
    someone please help?
    thanks
    Neelam Checknita ; ~ )

    Javadoc:
    WLPS 2.0: http://e-docs.bea.com/wlcs/javadoc/p13n/index.html
    WLCS 2.0: http://e-docs.bea.com/wlcs/javadoc/comp/index.html
    WLS 5.1: http://www.weblogic.com/docs51/classdocs/javadocs/index.html
    Main docs:
    WLPS/WLCS 2.0: http://e-docs.bea.com/wlcs/index.htm
    WLS 5.1: http://www.weblogic.com/docs51/resources.html
    If you have a slow internet connection then download the docs at
    http://www.beasys.com/download.html
    Ture Hoefner
    BEA Systems, Inc.
    2590 Pearl St.
    Suite 110
    Boulder, CO 80302
    www.bea.com

  • Starting Commerce Server and Personalization Server

    I am trying to evaluate these products. I am running NT 4.0, SP5 with
    256MB RAM. I have installed Weblogic Server 5.1.0 with SP 6. I have
    installed the latest version of the Commerce Server and Personalization
    Server. I had to remove the -server switch from the java command line in
    the startup script in order to get the JVM to start. The Commerce server
    begins to initialize, then a bunch of exceptions are thrown, then it
    shuts itself down.
    I have attached the log file
    WeblogicCommerceServer3.2\server\weblogic.log
    Thanks for any help on this.
    [weblogic.log]

    The error in your weblogic.log file of:
    2001:<E> <T3Services> COMMERCE_SERVER_FRAMEWORK,LOG_ERROR,"Current WebLogic build may
    not be compatible with the WebLogic Commerce Server implementation. Minimum Build:
    83914 Current Installation Build: 66825"
    Tue Apr 24 16:50:53 EDT
    means that WLCS cannot find the correct service pack files for WLS 5.10. Might check
    to see if the WLS 5.10 SP6 files (weblogic510sp6.jar and weblogic510s6boot.jar) are
    located in d:\weblogic\lib.
    Ted
    jcerruto wrote:
    I am trying to evaluate these products. I am running NT 4.0, SP5 with
    256MB RAM. I have installed Weblogic Server 5.1.0 with SP 6. I have
    installed the latest version of the Commerce Server and Personalization
    Server. I had to remove the -server switch from the java command line in
    the startup script in order to get the JVM to start. The Commerce server
    begins to initialize, then a bunch of exceptions are thrown, then it
    shuts itself down.
    I have attached the log file
    WeblogicCommerceServer3.2\server\weblogic.log
    Thanks for any help on this.
    Name: weblogic.log
    weblogic.log Type: Text Document (application/x-unknown-content-type-txtfile)
    Encoding: base64

  • Cluster and Personalization server

    Hi:
    How do I set my Personalization/Portal server up to work in WL cluster ?
    Thank You
    David L. Wasler
    [email protected]

    It's just like setting up Weblogic Server (WLS) in a cluster. The Weblogic
    Personalization Server (WLPS) is a framework built on top of WLS. Check the
    administration documents at
    http://www.weblogic.com/docs51/cluster/index.html
    Ture Hoefner
    BEA Systems, Inc.
    1655 Walnut Street; suite 200
    Boulder, CO 80302
    www.beasys.com

  • WLS Plugin and the Commerce/Personalization  Server

    Hi,
    Just wondering if the plugin which controls loads balancing can be used with
    the Commerce/Personalization server ?
    I have tried it ,but the way the portals works, the IIS server have no file
    extensions to work with as a portal address is http://ip:port/portalname".
    It doesn't have a file extension obviously, so the IIS box can invoke the
    plugin.
    Just wondering if anybody else has tried to get it working or it the plugin
    merely designed to work with the 5.1 WLS server ?
    Cheers
    Mick

    Hi,
    Just wondering if the plugin which controls loads balancing can be used with
    the Commerce/Personalization server ?
    I have tried it ,but the way the portals works, the IIS server have no file
    extensions to work with as a portal address is http://ip:port/portalname".
    It doesn't have a file extension obviously, so the IIS box can invoke the
    plugin.
    Just wondering if anybody else has tried to get it working or it the plugin
    merely designed to work with the 5.1 WLS server ?
    Cheers
    Mick

  • How to execute an SSIS package on a scheduled basis from remote server and pass in input files

    I have an application server and a db server.  My db server has all things SQL Server stored on it (DBMS, SSRS, SSIS, etc.)  I have several nightly batch process SSIS packages (dtsx files currently) that will pickup an input file and import them
    into the database.  I would like to execute all batch processes from my application server as I have quite a few other ones as well that do other stuff outside of SQL Server via powershell.  My question is how to do this?  Is there away to execute
    them remotely via DTexec.exe, should I set them up as Agent jobs and somehow pass in the file names\location (how?), create and SSIS catalog, etc.?  
    I need to easily be able to see if the packages execute successfully or not and if not capture the detailed information of why they failed from the remote server so I can use that to drive my process flow logic in the batch processes.

    Hi Jason,
    According to your description, you want to execute a package on a schedule and receive notification when package ends with error in the job.
    After testing the issue in my environment, we can directly add the package in a step of a job, then add a schedule and set the Alert and Notification property in the job to achieve your requirement. For more details, please see:
    Create a Database Mail in the SSMS.
    Right-click the SQL Server Agent services to Enable mail profile, then select the appropriate Mail profile.
    Under the Operators folder, create an operator with the correct E-mail name.
    Right-click the Jobs folder to add a new job.
    In the Steps pane, New a step with SQL Server Integration Services Package Type to run the package.
    In the Schedules pane, New a schedule for the job.
    In the Alerts pane, New an alert with SQL Server event alert, then enable Notify operators option with an operator in the Response pane.
    In the Notifications pane, enable Email option with same operator and When the job fails selection.
    Then when the package fails, the job would be failed and we can receive the error message in the mailbox.
    Besides, please make sure the account that execute the job has correct permissions for the file, for the folder that contains the file, and for the database.
    References:
    Configure Database Mail – Send Email From SQL Database
    How to setup SQL Server alerts and email operator notifications
    Thanks,
    Katherine Xiong
    If you have any feedback on our support, please click
    here.
    Katherine Xiong
    TechNet Community Support

  • ORACLE SERVER AND UNIX TP MONITOR-1

    제품 : ORACLE SERVER
    작성날짜 : 2002-05-17
    ====================================================================
    Subject: Oracle Server and UNIX Transaction Processing Monitors - 1
    =====================================================================
    PURPOSE
    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
         hours.
    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
    applications
         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
    below:
    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
    HP
    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
    UK
    There are also several third parties who are reselling the products listed
    above.
    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
    throughput.
    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
    statement.
    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 --------------------
                        Interface
    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?
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