IIS WLS6.1 SP3 and cluster load balancing

I am setting up an installation with IIS, WLS6.1 SP3 using a cluster. Monitoring
the instances in the cluster the entire load is going to one instance. If that
instance is stopped the other takes over, no problem. If I set DynamicServerList
to off in the iisproxy.ini file the load balances correctly.
Is there a way to ensure WLS sends the dynamic server list as advertised? Failing
that what are the problems that may arrise from not using the Dynamic Server List?

I would like to see the entries in your iisproxy.ini file?
Can you post 'em?
Kumar
Danny Newman wrote:
I am setting up an installation with IIS, WLS6.1 SP3 using a cluster. Monitoring
the instances in the cluster the entire load is going to one instance. If that
instance is stopped the other takes over, no problem. If I set DynamicServerList
to off in the iisproxy.ini file the load balances correctly.
Is there a way to ensure WLS sends the dynamic server list as advertised? Failing
that what are the problems that may arrise from not using the Dynamic Server List?

Similar Messages

  • Cluster/load balance weblogic using L4 switch like Alteon

    Can I install weblogic as a standalone server on 2 or more server and
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              switch (of course I will use a centralised storage to maintain a single copy
              of data which will eliminate syncronizing problem among servers)?
              BTW, Alteon can support persistent binding. The reason to use a Layer 4
              switch is that it is very fast, and this will make the application server
              layer transparent to client, the client can think this is a single server
              (it don't need to know whether there are 5 weblogic servers or 20 weblogic
              servers behind switch), and hardware are more reliable, sacalable and fast.
              I am not sure whether the normal weblogic clustered servers need to
              share/exchange info on the running memory, if it does, this approach will
              fail.
              

    So My understanding is:
              Alteon with WL 6.0 can do load balancing for:
              entity bean
              stateless session bean
              but can't do load balancing for:
              stateful session bean (will persistent/sticky binding solve part of the
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              in-memory replication
              am I right?
              Pao Wan
              "Don Ferguson" <[email protected]> wrote in message
              news:[email protected]...
              > It is possible to configure Alteon to understand the WebLogic 6.0 cookie
              format
              > and have a proxy-less cluster configuration that performs load balancing
              and
              > fail over of session state.
              >
              > It is also possible to configure Alteon's hardware-based SSL decryption
              for really
              > fast HTTPS processing.
              >
              > We are working on a white paper that describes how to configure Alteon for
              use
              > with WebLogic Server 6.0.
              >
              > -Don
              >
              >
              > Robert Patrick wrote:
              >
              > > Cameron,
              > >
              > > I believe that BEA tested their new proxy-less web clustering solution
              with
              > > load-balancing products from Alteon and several other vendors
              (Arrowpoint ?--
              > > which is now Cisco). However, it was my understanding that these
              products do
              > > not understand how to decrypt our cookies and extract IP addresses but
              rather
              > > these products are capable of doing sticky load balancing based on the
              Session
              > > ID contained in our cookie.
              > >
              > > If this is correct, then what this means is that when the primary server
              fails,
              > > the request will be routed to "some other server" in the cluster but not
              > > necessarily the one that holds the secondary copy of the user's session.
              The
              > > change in WLS 6.0 is that WLS will accept these misdirected requests and
              it will
              > > go out to the correct server and "migrate" the session to the server
              that
              > > received the request making that server the new primary (and
              regenerating the
              > > Session ID).
              > >
              > > I am sure if this is wrong that our product manager or one of our
              engineers will
              > > correct me (please?)...
              > >
              > > Hope this helps,
              > > Robert
              > >
              > > Cameron Purdy wrote:
              > >
              > > > Hi Robert,
              > > >
              > > > FWIW - There are several vendors (Primeon? Arrowpoint?) who claim to
              > > > understand WL cookies and parse the IPs out. (I haven't verified it
              myself
              > > > though.)
              > > >
              > > > --
              > > > Cameron Purdy
              > > > Tangosol, Inc.
              > > > http://www.tangosol.com
              > > > +1.617.623.5782
              > > > WebLogic Consulting Available
              > > >
              > > > "Robert Patrick" <[email protected]> wrote in message
              > > > news:[email protected]...
              > > > > There are not any hardware vendors (yet) that can understand
              WebLogic's
              > > > session
              > > > > ID. While you might be able to use the load balancer without the
              proxy on
              > > > 5.1,
              > > > > you would not be able to take advantage of in-memory replication
              failover
              > > > unless
              > > > > you only had two machines in the cluster. Like you said, everything
              will
              > > > work
              > > > > with 6.0 regardless of how the load balancer works (though you
              really,
              > > > really
              > > > > want to minimize the number of times the requests come into the
              wrong
              > > > server by
              > > > > utilizing sticky load balancing).
              > > > >
              > > > > Hope this helps,
              > > > > Robert
              > > > >
              > > > > Cameron Purdy wrote:
              > > > >
              > > > > > Rajesh,
              > > > > >
              > > > > > I meant that it would work in lieu of a proxy (such as Apache or
              NES)
              > > > with
              > > > > > 5.1, but only if both the hw load balancer and WL were set up to
              use
              > > > > > cookies. Some hw load balancers rely on IP and that doesn't
              work -- AOL
              > > > > > connections for example can change the source IP on the fly.
              Others
              > > > produce
              > > > > > their own cookies, that will work. Some even can use WL cookies
              and
              > > > parse
              > > > > > them to determine where to go. According to what I've read, with
              6.0 if
              > > > the
              > > > > > WL primary dies or for some other reason the request shows up at
              the
              > > > "wrong"
              > > > > > server, it will be handled correctly. That means you are pretty
              safe
              > > > with
              > > > > > hw load balancers and 6.0, almost regardless of the sticky
              > > > implementation
              > > > > > that they use.
              > > > > >
              > > > > > --
              > > > > > Cameron Purdy
              > > > > > Tangosol, Inc.
              > > > > > http://www.tangosol.com
              > > > > > +1.617.623.5782
              > > > > > WebLogic Consulting Available
              > > > > >
              > > > > > "Rajesh" <[email protected]> wrote in message
              > > > > > news:[email protected]...
              > > > > > >
              > > > > > > Hi Cameron,
              > > > > > > Can you elaborate on how it would work with WL5.1 since no in
              memory
              > > > > > replication
              > > > > > > would happen if the servers are standalone.
              > > > > > >
              > > > > > > "Cameron Purdy" <[email protected]> wrote:
              > > > > > > >Yes, this will work fine with WL6. (WL5.1 will work fine as
              long as
              > > > > > cookies
              > > > > > > >are used by the load balancer.)
              > > > > > > >
              > > > > > > >--
              > > > > > > >Cameron Purdy
              > > > > > > >Tangosol, Inc.
              > > > > > > >http://www.tangosol.com
              > > > > > > >+1.617.623.5782
              > > > > > > >WebLogic Consulting Available
              > > > > > > >
              > > > > > > >
              > > > > > > >"paowan" <[email protected]> wrote in message
              > > > > > > >news:[email protected]...
              > > > > > > >> Can I install weblogic as a standalone server on 2 or more
              server
              > > > and
              > > > > > > >> cluster/load balance weblogic using a hardware balancer like
              Alteon
              > > > > > Layer4
              > > > > > > >> switch (of course I will use a centralised storage to
              maintain a
              > > > single
              > > > > > > >copy
              > > > > > > >> of data which will eliminate syncronizing problem among
              servers)?
              > > > > > > >>
              > > > > > > >> BTW, Alteon can support persistent binding. The reason to use
              a
              > > > Layer
              > > > > > > >4
              > > > > > > >> switch is that it is very fast, and this will make the
              application
              > > > > > server
              > > > > > > >> layer transparent to client, the client can think this is a
              single
              > > > > > server
              > > > > > > >> (it don't need to know whether there are 5 weblogic servers
              or 20
              > > > > > weblogic
              > > > > > > >> servers behind switch), and hardware are more reliable,
              sacalable
              > > > and
              > > > > > > >fast.
              > > > > > > >>
              > > > > > > >> I am not sure whether the normal weblogic clustered servers
              need to
              > > > > > > >> share/exchange info on the running memory, if it does, this
              > > > approach
              > > > > > will
              > > > > > > >> fail.
              > > > > > > >>
              > > > > > > >>
              > > > > > > >
              > > > > > > >
              > > > > > >
              > > > >
              >
              

  • Cluster / Load balancing and no. of user

    Hi
    Just wondering what kind of cluster / load balancing setup is need for e.g. 50 concurrent users ? and what's the deciding factor that will justify additional presentation service / BI server to be added to an existing cluster farm ?
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    If there are 50 concurrent users, I don't think that you need to go for clustering. You can use more resources like increasing the RAM size and increasing th CPU count.
    If you opt for 64 bit operating system ,it would give you better performance.
    Regards
    Rajesh J

  • H-REAP and Client Load-Balancing

    I'm told by Cisco that H-REAP does not support client load-balancing.
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    Hi,
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  • How to make IIS plug-in do STICKY load balancing

    There are two classes of scalable services: pure and sticky. A pure service
    is one where any instance of the application can respond to client requests.
    A sticky service is one where a client sends its requests to the same
    instance; those requests are not redirected to other instances.
    It seems to me that weblogic IIS proxy plug-in does not support the sticky
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    Could someone give me some information on how to make the proxy sticky?
    Is there configuration parameters for this?
    Thanks,
    -Lei

    I set the cluster.
    It seems to me that there is some problem with the Set-Cookie mechanism of
    the plug-in.
    Sometime it set the cookie in my browser, sometime it is not.
    Even from the wlproxy.log, I could set something like
    Fri Aug 03 17:56:12 2001 Hdrs to
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    AE5VXOd!1782877802312707887!ltang.ariba.com!8001!7002; domain=ariba.com;
    path=/]
    But the cookie is not set in my browser, what might be wrong here?
    Thanks,
    -Lei
    "Eric Gross" <[email protected]> wrote in message
    news:[email protected]...
    I do believe that this will not work since if clustering is not enabled, a
    cookie will not be set on the browser that contains the primary and
    secondary server.
    You are specifying two different ports in your servers. You need to use
    clustering in order to get this functionality with the plugin.Furthermore,
    you will achieve fail-over.
    Regards,
    Eric
    "Lei Tang" <[email protected]> wrote in message
    news:[email protected]...
    Here is what I did for the examples under the bea sample directory.
    I put the following in test1/WEB-INF/weblogic.xml
    <session-descriptor>
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    <param-value> *.ariba.com </param-value>
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    <session-param>
    <param-name> CookieName </param-name>
    <param-value> AribaNode </param-value>
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    <session-param>
    <param-name> CookiePath </param-name>
    <param-value> /test1 </param-value>
    </session-param>
    </session-descriptor>
    </weblogic-web-app>
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    # This file contains initialization name/value pairs
    # for the IIS/WebLogic plug-in.
    WebLogicCluster=ltang.ariba.com:8001,achu.ariba.com:7001
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    "Eric Gross" <[email protected]> wrote in message
    news:[email protected]...
    If you leave the CookieName untouched on the WebLogic side, then there
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    Regards,
    Eric
    "Mark Vaughn" <[email protected]> wrote in message
    news:[email protected]...
    Actually, you also need to make sure you set the "CookieName" in theplugin.
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    an
    existing
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    it
    should
    send you to for continuing that session, or failing that session
    over.
    >>>>
    Eric Gross wrote:
    Without having clustering enabled, you will not get Sticky load
    balancing.
    You need to have clustering so that a cookie is sent back to the
    client
    that
    contains information about where it's session is located.
    Otherwise,
    you
    are just going to get round-robin each time.
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    http://e-docs.beasys.com/wls/docs61/cluster/servlet.html
    Regards,
    Eric
    "Lei Tang" <[email protected]> wrote in message
    news:[email protected]...
    WebLogicCluster=machine1:7001,machine2:7001
    ConnectTimeoutSecs=20
    ConnectRetrySecs=2
    Debug=ALL
    WLLogFile=c:\tmp\wlproxy.log
    WlForwardPath=/test,/test1
    DynamicServerList=OFF
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    machine2.
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    Should I make machine2 as a managed server and machine1 as an
    admi
    n
    server?
    Will this make the session sticky?
    Thanks,
    -Lei
    "Eric Gross" <[email protected]> wrote in message
    news:[email protected]...
    It would help us to know how you have iisproxy.ini configured.
    Sticky
    load
    balancing should work fine if you have the plug-in and
    WebLogic
    Server
    setup
    correctly.
    How have you setup the plug-in?
    Thanks,
    Eric
    "Lei Tang" <[email protected]> wrote in message
    news:[email protected]...
    There are two classes of scalable services: pure and sticky.
    A
    pure
    service
    is one where any instance of the application can respond to
    client
    requests.
    A sticky service is one where a client sends its requests to
    the
    same
    instance; those requests are not redirected to other
    instances.
    It seems to me that weblogic IIS proxy plug-in does notsupport
    the
    sticky
    load balancing.
    Could someone give me some information on how to make the
    proxy
    sticky?
    Is there configuration parameters for this?
    Thanks,
    -Lei
    .-. Mark Vaughn
    /V\ 7024 Corona Dr.
    // \\ North Richland Hills, TX 76180
    /( )\ [email protected]
    ^^-^^
    "Give a man a fish and you feed him for a day;
    teach him to use the Net and he won't bother you for weeks."
    Ben Woodbridge

  • Question Cluster/Load balancing

    Question about iplanet load balancing/Cluster:
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    Per Component Response Time(Web Connector Driven)
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    We used Per Server Response Time load balancing method.
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    see answers inline
    hcao wrote:
    Question about iplanet load balancing/Cluster:
    Following discussion are based on iAS C++ engine(kcs).
    We have four web servers and two iAS servers:
    Web1, Web2, Web3, Web4
    iAS1, iAS2
    All machines run Solaris 8, web server is iWS4.1 SP6,
    Application server is iAS6.0 SP2, and both iAS boxes have
    same hardware configuration.
    1. What's the best load balancing method for this structure?
    Per Server Response Time(Web Connector Driven)
    Per Component Response Time(Web Connector Driven)
    Round Robin(Web Connector Driven)
    User Defined Criteria(iAS Driven)
    it depends on the characteristics and behaviour of your application
    >
    2. What's the criteria for the kxs engine to choose the kcs
    engine to sent request if we set Web Connector Driven
    load balancing?
    kxs always does round robin to the kjs or kcs engines. The webconnector
    selects the kxs to which to send to.
    >
    3. If we set iAS driven load balancing, what's the criteria
    for the web connector used to choose kxs?
    as specified by your criteria in the iAS driven section.
    The ias instance will send its current list of preferences for ias
    intances it got from the criteria to the webconnector. This information
    is dynamic and updated constantly.
    >
    4. We got a problem when run load testing for an AppLogic
    in this cluster, one iAS CPU average usage got almost
    100%, but the other one is just 70%.
    We used Per Server Response Time load balancing method.
    again, this can be a valid result depending on the way your applogics
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    components execute differently and you specified to use the average of
    those results to determine load balancing this can be a valid result
    because differences in execution times of your applogics.
    >
    Thanks.
    Hengregards
    Han-Dat
    Consulting Project Engineer
    iPlanet Professional Services - ANZ
    iPlanet e-commerce Solutions
    - A Sun|Netscape Alliance
    Sun Microsystems Australia Pty Ltd

  • Wlp and apache load balancing

    Hi,
              I have been trying to understand webloigc clustering and load balancing capabilities. I have been through the edocs but it does not explain how things work, instead they only emphasis on how to configure.
              Consider the following scenario:
              --------cisco firewall/load balancer------------
              apatche1 apache2 apache3
              -------------------firewall-------------------------
              WLP1 WLP2 WLP3 WLP4
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              (1) how apache servers load balance incoming requests amongst the four portal instances? I understand that it will use weblogic proxy plug-in. the httpd.config also should be configured to proxy requests to WLP instances by adding the corresponding address:prot entries for each instance, using WebLogicCluster keyword.
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              (3) even failover is going to be handled by apache servers?
              (4) if I need to use SSL and I need to have my SSL encryption/decryption to be done on WLP instances; apache servers will only forward requests, no encryption/decryption to be done on the web tier. Is this possible?
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              (5) Are there any best practice to implement load balancing and failover on weblogic portal?
              I appreciate any input in this regards.

    1. yes, configure the apache plugin. put your 4 servers in the WeblogicCluster property (host:port,host:port...). The proxy will round robin requests between the servers in the cluster, although sessions are pinned to a single server. So if a request with a session (jsessionid cookie) comes in, it will read the primary server from the cookie and route it to that server.
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    2. right, the cluster allows failover by replication. apache plugin will perform the failover.
    3. the plugin will keep a dynamic server list so if a server goes down, it will update the cluster list and not route to it. it will also retry requests on another server on an error or timeout connecting. you can tweak timeout settings like WLSocketTimeoutSecs and ConnectTimeoutSecs. and keep idempotent ON which allows failover, unless you aplpication can't handle this.

  • Cluster (Load balancing) implementation in obiee 10g

    Hi All,
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    2. OBIEE 10.1.3.4.1
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    Award points it is useful.
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    Satya
    Edited by: satya R on Apr 1, 2012 9:03 PM

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    IRC_DR                           Suspended     0      1   255            1
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