OCS on a cluster with Load balancing and fail safe environment

Dear all,
i want to ask is there any documat or hints on how to do an OCS R2 installaiotn on 3 server with RAC option (clustered Fail Safe), how can i install OCS on a cluster with Load balancing and fail safe environment.
plz i need ur help
thanking u
[email protected]

Dear all,
i want to ask is there any documat or hints on how to do an OCS R2 installaiotn on 3 server with RAC option (clustered Fail Safe), how can i install OCS on a cluster with Load balancing and fail safe environment.
plz i need ur help
thanking u
[email protected]

Similar Messages

  • Distributed HA cluster with load-balancing and failover: advice?

    My workplace has a Xeon Xserve, which acts as our primary external server, with an attached ActiveStorage XRAID. We have just purchased a second Xserve/XRAID set to act as a mirror, which we will colocate. Both have Leopard Server installed, along with an array of additional software.
    What we want to do is have both servers load-balance between the two, with failover in case of a server or XRAID fault. I plan on using RSYNC to mirror static files between the two, and I'm looking into PostgreSQL replication and load-balancing solutions for our database. I gather that Apache supports web-server failover and load-balancing, as well. But, that still leaves the actual host and network setup to arrange.
    Does Leopard server support such a thing? The only information I found on IP failover instructs the user to place the two servers on the same subnet, directly connected via ethernet cable; obviously, this would not work in my case.
    Ideally, what we'd end up with is a situation in which the two systems kept each other in sync, both in static files and database data, and load-balanced between themselves; in cases of failure, the remaining system would transparently assume all duties until the other was restored, at which time they would resynchronize
    Any suggestions on how I could arrange such a thing?

    Interesting. Does this DNS-based approach support session tracking, though? I would need to have a user directed to just one of the two servers for the duration of their session, to avoid having to synchronize temporary files and such.
    You can't have it both ways. You need to build tolerance into the app.
    At the simplest level where you run all traffic to one site and use the second site as a failover/standby site you'll be OK most of the time - all users will go to the same server and their sessions will be intact.
    However, under any failover situation (your primary site is down for some reason), there is going to be some level of session traffic that it going to switch over to the other site. If your site depends on sessions then you're going to need to tolerate this kind of situation - your app will need to be able to fail gracefully if a user comes in with an invalid session cookie.
    Note, though, that this may be less of an issue than you at first think - all DNS clients will cache DNS data for whatever TTL you set. This means that if a user looks up your site name and you return an IP address with a 30 minute TTL, then that user is going to use the same IP address for the next 30 minutes and isn't going to ask the server again. This should negate most chance of a user suddenly switching from one server location to the other in mid-session.
    The trick comes in setting the DNS TTL low enough to effect a failover, yet not so long that you impact performance - e.g. you don't want the user to perform a DNS lookup on every page load. You may find that 10 minutes is appropriate. Just bear in mind that this affects how long a user could see your site 'down' before the failover DNS kicks in. Clearly you don't want to set the DNS TTL to a day since that may prevent the user switching to the secondary site for 24 hours by which time, hopefully, the primary site is back up, anyway.
    The 'right' TTL value may take some analysis on your traffic to see how long a typical user 'session' is. If the average user spends 20 minutes on your site, then it would make sense to set your TTL to somewhere around 20 minutes to give the best chance of their entire session staying on the same server.

  • Dual WLAN links with load balancing and failover

    Hello,
    I am in a scenario where I am in need of two WLAN links between two buildings. There is a distance of 100-150 meters and minimum bandwidth required for both links together is 300Mbit/s. The thing is that both links should use load balancing between them and if one of them goes down, the last one should act as fail over.
    I have been looking at Cisco Aironet 1550 Series though I have no idea what is needed to get load balancing and fail over to work, so I am searching here for suggestions on what equipment is needed.
    Something like this:
                  ---------------WLAN Link 150-300Mbit/s-----------
    Building                    Load balancing and fail over               Building
                  ---------------WLAN Link 150-300Mbit/s-----------
    Thanks in advance!

    Several points.
    When an AP is doing 300Mbps, that's NOT the real throughput you have. It's the data rate at which traffic is sent.
    All in all, if your AP/client are doing 300MBps association, you will see max 150Mbps with a file transfer.
    From there, I'm not even sure that 11n supports dual spatial streams over such long distances (you can't have multipath in open air) so afaik the 1550 only do 150Mbps association rate (=dual channel with one spatial stream). That means 75Mbps real speed.
    I couldn't test a 1550 yet so don't take my word for official statement but that's what I'm thinking.
    the wireless links will always be both up and they can be on different channels.
    That will then mean that it will be "as if" the remote switch was connected directly to the central switch (where WLC is connected) as the WLC tunnels traffic all the way. So you could do a spanning-tree config on this one I guess to block the port onthe remote switch.
    Regards,
    Nicolas

  • Load-balancing and fail-over between web containers and EJB containers

    When web components and EJB components are run in different OC4J instances, can we achieve load-balancing and fail-over between web containers and EJB containers?
    null

    It looks like there is clustering, but not loadbalancing available for rmi
    from the rmi.xml configuration. The application will treat any ejbs on the
    cluster as one-to-one look-ups. Orion will go out and get the first ejb
    available on the cluster. See the docs on configuring rmi.xml (and also the
    note below).
    That is a kind-of failover, because if machine A goes down, and the
    myotherAejbs.jar are on machine B too, orion will go out and get the bean
    from machine B when it can't find machine A. But it doesn't go machine A
    then machine B for each remote instance of the bean. You could also specify
    the maximum number of instances of a bean, and as one machine gets "loaded",
    orion would go to the next available machine...but that's not really
    loadbalancing.
    That is, you can set up your web-apps with ejbs, but let all of the ejbs be
    remote="true" in the orion-application.xml file:
    <?xml version="1.0"?>
    <!DOCTYPE orion-application PUBLIC "-//Evermind//DTD J2EE Application
    runtime 1.2//EN" "http://www.orionserver.com/dtds/orion-application.dtd">
    <orion-application deployment-version="1.5.2">
    <ejb-module remote="true" path="myotherAejbs.jar" />
    <ejb-module remote="true" path="myotherBejbs.jar" />
    <ejb-module remote="true" path="myotherCejbs.jar" />
    &ltweb-module id="mysite" path="mysite.war" />
    ... other stuff ...
    </orion-application>In the rmi.xml you would define your clustering:
    <cluster host="230.0.0.1" id="123" password="123abc" port="9127"
    username="cluster-user" />
    Tag that is defined if the application is to be clustered. Used to set up
    a local multicast cluster. A username and password used for the servers to
    intercommunicate also needs to be specified.
    host - The multicast host/ip to transmit and receive cluster data on. The
    default is 230.0.0.1.
    id - The id (number) of this cluster node to identify itself with in the
    cluster. The default is based on local machine IP.
    password - The password configured for cluster access. Needs to match that
    of the other nodes in the cluster.
    port - The port to transmit and receive cluster data on. The default is
    9127.
    username - The username configured for cluster access. Needs to match that
    of the other nodes in the cluster.

  • WLS6.1sp1 stateful EJB problem =   load-balancing and fail over

              I have three problem
              1. I have 2 clustered server. my weblogic-ejb-jar.xml is here
              <?xml version="1.0"?>
              <!DOCTYPE weblogic-ejb-jar PUBLIC '-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB//EN'
              'http://www.bea.com/servers/wls600/dtd/weblogic-ejb-jar.dtd'>
              <weblogic-ejb-jar>
              <weblogic-enterprise-bean>
                   <ejb-name>DBStatefulEJB</ejb-name>
                   <stateful-session-descriptor>
                   <stateful-session-cache>
                        <max-beans-in-cache>100</max-beans-in-cache>
                        <idle-timeout-seconds>120</idle-timeout-seconds>
                   </stateful-session-cache>
                   <stateful-session-clustering>
                        <home-is-clusterable>true</home-is-clusterable>
                        <home-load-algorithm>RoundRobin</home-load-algorithm>
                        <home-call-router-class-name>common.QARouter</home-call-router-class-name>
                        <replication-type>InMemory</replication-type>
                   </stateful-session-clustering>
                   </stateful-session-descriptor>
                   <jndi-name>com.daou.EJBS.solutions.DBStatefulBean</jndi-name>
              </weblogic-enterprise-bean>
              </weblogic-ejb-jar>
              when i use "<home-call-router-class-name>common.QARouter</home-call-router-class-name>"
              and deploy this ejb, exception cause
              <Warning> <Dispatcher> <RuntimeException thrown b
              y rmi server: 'weblogic.rmi.cluster.ReplicaAwareServerRef@9 - jvmid: '2903098842
              594628659S:203.231.15.167:[5001,5001,5002,5002,5001,5002,-1]:mydomain:cluster1',
              oid: '9', implementation: 'weblogic.jndi.internal.RootNamingNode@5f39bc''
              java.lang.IllegalArgumentException: Failed to instantiate weblogic.rmi.cluster.B
              asicReplicaHandler due to java.lang.reflect.InvocationTargetException
              at weblogic.rmi.cluster.ReplicaAwareInfo.instantiate(ReplicaAwareInfo.ja
              va:185)
              at weblogic.rmi.cluster.ReplicaAwareInfo.getReplicaHandler(ReplicaAwareI
              nfo.java:105)
              at weblogic.rmi.cluster.ReplicaAwareRemoteRef.initialize(ReplicaAwareRem
              oteRef.java:79)
              at weblogic.rmi.cluster.ClusterableRemoteRef.initialize(ClusterableRemot
              eRef.java:28)
              at weblogic.rmi.cluster.ClusterableRemoteObject.initializeRef(Clusterabl
              eRemoteObject.java:255)
              at weblogic.rmi.cluster.ClusterableRemoteObject.onBind(ClusterableRemote
              Object.java:149)
              at weblogic.jndi.internal.BasicNamingNode.rebindHere(BasicNamingNode.jav
              a:392)
              at weblogic.jndi.internal.ServerNamingNode.rebindHere(ServerNamingNode.j
              ava:142)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              2)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              9)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              9)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              9)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              9)
              at weblogic.jndi.internal.RootNamingNode_WLSkel.invoke(Unknown Source)
              at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:296)
              So do i must use it or not???
              2. When i don't use "<home-call-router-class-name>common.QARouter</home-call-router-class-name>"
              , there's no exception
              but load balancing does not happen. According to the document , there's must load
              balancing when i call home.create() method.
              my client program goes here
                   DBStateful the_ejb1 = (DBStateful) PortableRemoteObject.narrow(home.create(),
              DBStateful.class);
                   DBStateful the_ejb2 = (DBStateful) PortableRemoteObject.narrow(home.create(3),
              DBStateful.class);
              the result is like that
                   the_ejb1 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@4695a6)/397
                   the_ejb2 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@acf6e)/398
                   or
                   the_ejb1 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@252fdf)/380
                   the_ejb2 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@6a0252)/381
                   I think the result should be like under one... isn't it??
                   the_ejb1 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@4695a6)/397
                   the_ejb2 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@6a0252)/381
              In this case i think the_ejb1 and the_ejb2 must have instance in different cluster
              server
              but they go to one server .
              3. If i don't use      "<home-call-router-class-name>common.QARouter</home-call-router-class-name>",
              "<replication-type>InMemory</replication-type>" then load balancing happen but
              there's no fail-over
              So how can i get load-balancing and fail over together??
              

              I have three problem
              1. I have 2 clustered server. my weblogic-ejb-jar.xml is here
              <?xml version="1.0"?>
              <!DOCTYPE weblogic-ejb-jar PUBLIC '-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB//EN'
              'http://www.bea.com/servers/wls600/dtd/weblogic-ejb-jar.dtd'>
              <weblogic-ejb-jar>
              <weblogic-enterprise-bean>
                   <ejb-name>DBStatefulEJB</ejb-name>
                   <stateful-session-descriptor>
                   <stateful-session-cache>
                        <max-beans-in-cache>100</max-beans-in-cache>
                        <idle-timeout-seconds>120</idle-timeout-seconds>
                   </stateful-session-cache>
                   <stateful-session-clustering>
                        <home-is-clusterable>true</home-is-clusterable>
                        <home-load-algorithm>RoundRobin</home-load-algorithm>
                        <home-call-router-class-name>common.QARouter</home-call-router-class-name>
                        <replication-type>InMemory</replication-type>
                   </stateful-session-clustering>
                   </stateful-session-descriptor>
                   <jndi-name>com.daou.EJBS.solutions.DBStatefulBean</jndi-name>
              </weblogic-enterprise-bean>
              </weblogic-ejb-jar>
              when i use "<home-call-router-class-name>common.QARouter</home-call-router-class-name>"
              and deploy this ejb, exception cause
              <Warning> <Dispatcher> <RuntimeException thrown b
              y rmi server: 'weblogic.rmi.cluster.ReplicaAwareServerRef@9 - jvmid: '2903098842
              594628659S:203.231.15.167:[5001,5001,5002,5002,5001,5002,-1]:mydomain:cluster1',
              oid: '9', implementation: 'weblogic.jndi.internal.RootNamingNode@5f39bc''
              java.lang.IllegalArgumentException: Failed to instantiate weblogic.rmi.cluster.B
              asicReplicaHandler due to java.lang.reflect.InvocationTargetException
              at weblogic.rmi.cluster.ReplicaAwareInfo.instantiate(ReplicaAwareInfo.ja
              va:185)
              at weblogic.rmi.cluster.ReplicaAwareInfo.getReplicaHandler(ReplicaAwareI
              nfo.java:105)
              at weblogic.rmi.cluster.ReplicaAwareRemoteRef.initialize(ReplicaAwareRem
              oteRef.java:79)
              at weblogic.rmi.cluster.ClusterableRemoteRef.initialize(ClusterableRemot
              eRef.java:28)
              at weblogic.rmi.cluster.ClusterableRemoteObject.initializeRef(Clusterabl
              eRemoteObject.java:255)
              at weblogic.rmi.cluster.ClusterableRemoteObject.onBind(ClusterableRemote
              Object.java:149)
              at weblogic.jndi.internal.BasicNamingNode.rebindHere(BasicNamingNode.jav
              a:392)
              at weblogic.jndi.internal.ServerNamingNode.rebindHere(ServerNamingNode.j
              ava:142)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              2)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              9)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              9)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              9)
              at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
              9)
              at weblogic.jndi.internal.RootNamingNode_WLSkel.invoke(Unknown Source)
              at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:296)
              So do i must use it or not???
              2. When i don't use "<home-call-router-class-name>common.QARouter</home-call-router-class-name>"
              , there's no exception
              but load balancing does not happen. According to the document , there's must load
              balancing when i call home.create() method.
              my client program goes here
                   DBStateful the_ejb1 = (DBStateful) PortableRemoteObject.narrow(home.create(),
              DBStateful.class);
                   DBStateful the_ejb2 = (DBStateful) PortableRemoteObject.narrow(home.create(3),
              DBStateful.class);
              the result is like that
                   the_ejb1 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@4695a6)/397
                   the_ejb2 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@acf6e)/398
                   or
                   the_ejb1 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@252fdf)/380
                   the_ejb2 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@6a0252)/381
                   I think the result should be like under one... isn't it??
                   the_ejb1 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@4695a6)/397
                   the_ejb2 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
                   daryReplicaHandler@6a0252)/381
              In this case i think the_ejb1 and the_ejb2 must have instance in different cluster
              server
              but they go to one server .
              3. If i don't use      "<home-call-router-class-name>common.QARouter</home-call-router-class-name>",
              "<replication-type>InMemory</replication-type>" then load balancing happen but
              there's no fail-over
              So how can i get load-balancing and fail over together??
              

  • OAM 11g integration with Kerberos on cluster with load-balanced virtualhost

    Hello!
    I need to make a Kerberos integration with OAM.
    I find following notes about OAM 11g: WNA Configuration for HA Clusters [ID 1365888.1] (https://support.oracle.com/epmos/faces/ui/km/SearchDocDisplay.jspx?_afrLoop=223640518878014&type=DOCUMENT&id=1365888.1&displayIndex=1&_afrWindowMode=0&_adf.ctrl-state=14ehvbh4z2_61).
    "In an OAM Clustered environment, the OAM Principal for WNA must be the same on all tiers i.e. the load-balanced virtualhost for the OAM cluster.
    Therefore each OAM managed server will reference the same keytab file, generated for Principal HTTP/<virtualhost.domain>, and the keytab file will be in the same location on all OAM managed servers.
    For example: ${DOMAIN_HOME}/domains/${DOMAIN_NAME}/config/fmwconfig/oam/<keytab filename>.
    After copying the keytab file to the same directory on all OAM managed server machines, complete the configuration of the Kerberos authentication module in OAM Administration Console (/oamconsole).
    The AdminServer will ensure that the oam-config.xml file on all OAM managed server tiers in the cluster is updated with this configuration."
    The question is; When I generate oam.keytab with following command, What is the name of the server that I will must put in the command? Virtualhost (load-balanced), Node1 or Node2?
    ktpass -princ HTTP/<servername>@DOMAIN -pass XXXXXXX mapuser DOMAIN\user -out oam.keytab.
    Thanks in advance and best regards!
    PS: Sorry if my english is not clear.

    David,
    Your Principal name should be the SSO LB URL.(ie :sso.mycomany.com)
    ktpass -princ HTTP/sso.mycomany.com@DOMAIN -pass XXXXXXX mapuser DOMAIN\user -out oam.keytab.
    Also make sure sso.mycomany.com has a reverse DNS configured correctly.
    you can check using dig command
    ping sso.mycomany.com
    What ever the ip-address
    dig -x <IP-ADDRESS>
    Check in the reverse DNS section there should be 1 record.
    ;; ANSWER SECTION:
    1.1.1.1.in-addr.arpa. 3600 IN PTR sso.mycomany.com.
    Let me know if you have more questions.
    Thanks
    Saurabh

  • Webdispatcher with load-balancing and local icm configuration

    Dear all,
    we have a webdispatcher in place to load-balance the requests to our three application servers (ABAP). The webdispatcher has a hostname that is resolved by the DNS. The application servers use local hostnames that can't be resolved in our infrastructure at the moment.
    That configuration works fine for all requests that reach the infrastructure from outside.
    But, if a user logs on with SAP GUI and then calls a web transaction like a webdynpro, the browser opens with the local application server hostname. However that hostname can't be resolved.
    Is it possible to change the three local icm configurations in a way that all local generated web requests refers to the webdispatcher too? What is the preferred configuration for this more or less usual scenario?
    Thanks in advance,
    Daniel

    Hello,
    In your scenario, I would try to create entries in table HTTPURLLOC. After that the 3 app servers should generate URLs using the SAP Web Dispatcher.
    Best Regards,
    Olivier

  • Need help with load balancing and DNS proxy

    Hi,
    I need help on how to configure my router so it will work with my DNS proxy and load balancing.
    I have a Linksys LRT224 router. I have two broadband connections from two separate ISPs,500Mbps each (WAN1 & WAN2). WAN1 has a static IP and WAN2 is dynamic assigned. I use Unlocator (www.unlocator.com) so I can access geographically restricted sites (Pandora, Netflix, etc.).
    The problem I have is that unlocator registers only one IP address (WAN1 address) and since I am doing load balancing I have no way of knowing if the DNS request will go through the registered IP (WAN1) or through the other (WAN2). I am not an expert in routing or networking but I'm guessing I have a way of configuring the router so all the DNS requests go out through WAN1, right?
    In the router's Dual WAN config page there is a section for Protocol Binding. I tried to configure but only managed to screw up the internet at home. I used:
    DNS[UDP/53-53]->192.168.1.1-192.168.1.254(0.0.0.0-0.0.0.0)WAN2
    Any help or suggestions are appreciated.
    Alex

    Good solution though. That's probably the only way you could do true Load Balancing anyway.
    Please remember to Kudo those that help you.
    Linksys
    Communities Technical Support

  • Need help with load balancing and DNS proxy -Repost

    Hi,
    I need help on how to configure my router so it will work with my DNS proxy and load balancing.
    I have a Linksys LRT224 router. I have two broadband connections from two separate ISPs,500Mbps each (WAN1 & WAN2). WAN1 has a static IP and WAN2 is dynamic assigned. I use Unlocator (www.unlocator.com) so I can access geographically restricted sites (Pandora, Netflix, etc.).
    The problem I have is that unlocator registers only one IP address (WAN1 address) and since I am doing load balancing I have no way of knowing if the DNS request will go through the registered IP (WAN1) or through the other (WAN2). I am not an expert in routing or networking but I'm guessing I have a way of configuring the router so all the DNS requests go out through WAN1, right?
    In the router's Dual WAN config page there is a section for Protocol Binding. I tried to configure but only managed to screw up the internet at home. I used:
    DNS[UDP/53-53]->192.168.1.1-192.168.1.254(0.0.0.0-​0.0.0.0)WAN2
    Any help or suggestions are appreciated.
    Alex

    Good solution though. That's probably the only way you could do true Load Balancing anyway.
    Please remember to Kudo those that help you.
    Linksys
    Communities Technical Support

  • Distributed services with load balancing and failover?

    Hullo;
    What platform would you use to implement something like the following:
    * easy registration of various services
    * delegation of a service request to the best candidate of many, based on some measure (probably reported by the services themselves)
    * quick failover and location of an alternate service in case the best candidate does not respond (real-life environment, uncertain networks and servers;)
    RMI could be a starting point, with a custom SocketFactory to take care of the timeouts and redelegations and a good delegator service to work through. The service concept sounds a lot like JINI, but I don't see any provision for best candidate selection, and wonder whether JINI would really save any time compared to RMI in this case.
    Is there anything else I should be aware of? I wouldn't mind finding a pre-built wheel. (Cougaar (http://www.cougaar.org/) is on my reading list; a quick glance gives me the impression it may be a bit too heavy on the communication level, but maybe I'm wrong.)
    Thanks for your thoughts;
    //ata

    ata,
    Before jumping to anything so bloated and limited as cougaar, take time to consider what you really need. Before grabing at the fanciest Java features like RMI, JINI, and custom SocketFactories; focus on what you are trying to accomplish.
    There are plenty of great answers right here, at this forum.
    Good hunting,
    John

  • Forms load balancing and fail-over

    Using cisco context switches instead of metric server/metric client. Having trouble making forms fail-over when a 9ias server fails. Has anybody done this?
    If so, how?

    Using cisco context switches instead of metric server/metric client. Having trouble making forms fail-over when a 9ias server fails. Has anybody done this?
    If so, how?

  • OCS 10g Cluster Installation  - Load Balancing

    Hi all,
    Anybody have sucessfully install and configure OCS 10g Cluster ?, with load balancing ?
    I'm trying to install OCS 10g cluster with a two node server setup, and using Oracle web Cache as the load balancer, but not sucessfull. Any hints ?
    Regards
    Lanang

    Just found out that Oracle Web Cache support HTTP and HTTPS only, no LDAP traffic yet. That why the cluster node installation failed. Trying using iptables NAT for the LDAP traffic, and the HTTP will use web cache.
    Regards
    Din

  • Load Balancing and Failover with 10G Standard Edition

    Hi,
    I am new to Oracle Replication and need some help setting up replication for load balancing and failover. Is this possible using Oracle 10G Standard Edition? I plan on having all updates done on the master site and both databases will be for reads. In case of failure of the master site, I would need to be able to failover to the other database.
    Also, if anyone knows of any documention for Basic Replication in 10G, please let me know.
    Thanks.

    Simple nnapshot replication of data would require significant manual effort to configure to load balance or failover. One the load balancing side, you would generally be limited to to static load balancing-- assigning half the users to one machine and the other half of the users to the other machine, regardless of who is actively using the machine. Failover would be a significant manual effort, particularly to bring the failed machine back into the cluster. You would be implementing the guts of multi-master replication.
    Frankly, if you actually have a system which is valuable enough to need load balancing and disaster recovery, I'm going to wager that it will be far cheaper even in the short run to buy more boxes and/or enterprise edition licenses than to try to implement this sort of thing yourself. In the long run, it will be far cheaper, since it will be far easier to maintain. Building all this yourself would probably be penny wise and pound foolish.
    Justin
    Distributed Database Consulting, Inc.
    http://www.ddbcinc.com/askDDBC

  • Recommended configuration for load balanced Portal with load balancer, multiple gateways and multiple servers.

    Does anyone have a recommended network, hardware and software configuration guide for a Portal installation running with multiple gateways load balanced (ie one URL) that talk to multiple servers?

    David,
    We've used Resonate (software) to load balance the gateways. It allows
    you to group all the gateways under 1 virtual URL and load balance the
    incoming connections over each gateway depending on the rules that you
    define in Resonate. Look in the SUN portal whitepapers there is one that
    talks about it specifically.
    As far as load balancing the calls to the portals, the gateways will
    automatically load balance across all the portals that they know about
    using a simple round-robin rotation. You may be able to use Resonate in
    front of the portals but you may need to activate persistance within
    Resonate to ensure that the user always ends up on the portal that he
    established his initial connection on (if you want that), check with Sun
    on this one.
    David Broeren wrote:
    Recommended configuration for load balanced Portal with load balancer,
    multiple gateways and multiple servers.
    Does anyone have a recommended network, hardware and software
    configuration guide for a Portal installation running with multiple
    gateways load balanced (ie one URL) that talk to multiple servers?
    Try our New Web Based Forum at http://softwareforum.sun.com
    Includes Access to our Product Knowledge Base!

  • Which cluster attribute should you modify to ensure that load balancing and

    An EJB is targeted to a cluster. Remote EJB clients can therefore take advantage of WebLogic Server’s load balancing and failover capabilities.
    However, a proxy server exists between the clients and cluster, which performs IP address transaction.
    Which cluster attribute should you modify to ensure that load balancing and failover work correctly?
    A. Multicast Address
    B. Persistent Store
    C. Cluster Address
    D. Migration Basis
    E. Replication Channel

    http://docs.oracle.com/cd/E13222_01/wls/docs81/config_xml/Cluster.html
    Cluster address

Maybe you are looking for