How to load balance everything

Edit:
More up to date list is available on the wiki:
http://wiki.oracle.com/page/WCI+Load+Balancing
Its hard to find information related to deployment anymore, as there is no deployment guide for 10gR3 and a lot of information is scattered around in outdated blog posts. I'd like to keep a list of how to design every component for HA. I don't doubt that there are a lot of errors and things that need filled in so please reply with your additions and corrections.
h3. Types of load balancing referenced:
h4. external
refers to a hardware or software based load balancing handled outside Webcenter software
h4. MPPE
the 'massively parallel portlet engine' is the portal's ability to internally load balance web services that are configured with round robin DNS
h4. cold failover
I might have the terminology wrong, but I'm referring to when you have another instance of the product installed but disabled. The instance can be turned on in the event of an ourage of the primary component, but it is not automatically available.
h1. Portal
Load balanced with an external load balancer (sticky session enabled)
h3. References:
http://edocs.bea.com/alui/deployment/docs604/networking/c_loadbalancing.html
h1. API
h1. Publisher
Publisher is able to be load balanced by breaking it up into components: publisher admin, publisher redirect, published content
h2. Publisher admin
Cannot be load balanced, use cold failover
h2. Publisher redirector
MPPE (or external?)
h2. Published content
external
h3. References:
http://fsanglier.blogspot.com/2008/02/alui-publisher-increase-performance.html
h1. Collaboration
External / MPPE (with collab internal clustering)
(Although i'm currently having issues wtih this and someone reported that you can do without the collab internal clustering)
h3. Collab's API
When using the IDK to connect to collab, custom applications bypass the MPPE and communicate directly to the collab host, losing the benefit of the MPPE. In order to load balance in this situation, the collab host must use external load balancing. (is this true?)
h3. "Search" service (the collab one) (only applies to 4.5 or newer)
Install on same servers as collab?
http://download.oracle.com/docs/cd/E13158_01/alui/collaboration/docs103/install/install.htm#i1138897
h3. References:
http://edocs.bea.com/alui/deployment/docs604/networking/c_loadbalancing.html
recent collab outage related questions
h1. Document Repository
External
h1. (AD/LDAP) Identity Web Services
MPPE to the Web Services
External between Web Services and AD /LDAP servers (or use HOSTS files to point each ADAWS server to a differnet AD server?)
h1. Search
(grid search: 6.1 or newer)The portal can load balance search requests internally. Each search node has knowledge of other nodes, so only 1 node needs to be reported to the portal. When the portal starts up, the 1 search node that is registered with the portal MUST be available.
h1. Analytics
Analytics UI
(i'm not sure? i'm guessing anything would work here because the admin UI is pretty much read only on the database)
Analytics collector can be load balanced (as of 2.5)
http://download-llnw.oracle.com/docs/cd/E13158_01/alui/analytics/docs103/installALI/quickstart.html#wp1063387
h1. Automation
Load balancing for reduncancy is not possible. However, the work can be split up Automation servers are assigned to different folders. Don't assign 2 automation servers to the same folder, as they can compete for jobs. (?)
h1. Content Upload
(mppe / external)?
h1. ALUI Directory Service
h1. Remote Portlet Service
? (i'm gussing MPPE)
h1. Notification
? no idea
h1. What else am i missing?
Edited by: Joel Collins on Apr 27, 2009 6:52 AM

Here are few bits of info:
For load balancing for Analytics, that isn't officially supported yet for the UI and Administration components. It might work with sticky sessions from portal-to-analytics but that doesn't get you much. Improving the options there would be a good enhancement request.
For the collector, I think there are two important things to remember. Use broadcast mode. I've never actually seen it in unicast mode, but broadcast definitely works. Also, remember that this is all managed by Portal and Analytics - you don't use your own load balancer between Portal instances and the Analytics Collector instances.
Finally, ALUI Directory is not certified to be load balanced yet. On a separate note, ALUI Directory has a socket leak on Windows due to a bug in the version of Jrockit that ships with it. Upgrading the embedded application server for the ALUI/WCI installation to jrockit-R27.5.0-jdk1.5.0_14 will resolve it.

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outside inside
--- L3 SW --+
|
MHSRP +--- FWSM ----
|
--- L3 SW --+
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Carl,
What you have mentioned sounds very straightforward then everything should go well.
The ACE is a load balancer which takes a load balancing decisions based on different matching methods like matching virtual address, url, source address, etc then once the load balance decision has been taken then the ACE will load balance the traffic based on the load balance method which you have configured (if you do not configure anything then it will use the default which is "round robin"), then it will send the traffic to the servers which it has available and finally the client should get the content.
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http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/ace_appliances/vA3_1_0/configuration/slb/guide/overview.html#wp1000976
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One Arm Mode
Routed Mode
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http://docwiki.cisco.com/wiki/Basic_Load_Balancing_Using_Bridged_Mode_on_the_Cisco_Application_Control_Engine_Configuration_Example
Here you have a link for One Arm Mode and a sample for that:
http://docwiki.cisco.com/wiki/Basic_Load_Balancing_Using_One_Arm_Mode_with_Source_NAT_on_the_Cisco_Application_Control_Engine_Configuration_Example
Here you have a link for Routed Mode and a sample for that:
http://docwiki.cisco.com/wiki/Basic_Load_Balancing_Using_Routed_Mode_on_the_Cisco_Application_Control_Engine_Configuration_Example
Then as you could see in all those links you may end up having a configuration like this:
interface vlan 40
description "Default gateway of real servers"
ip address 192.168.1.1 255.255.255.0
service-policy input remote-access
no shutdown
ip route 0.0.0.0 0.0.0.0 172.16.1.1
class-map match-all slb-vip
2 match virtual-address 172.16.1.100 any
policy-map multi-match client-vips
class slb-vip
    loadbalance vip inservice
    loadbalance policy slb
policy-map type loadbalance http first-match slb
class class-default
    serverfarm web
serverfarm host web
rserver lnx1
    inservice
rserver lnx2
    inservice
rserver lnx3
    inservice
rserver host lnx1
ip address 192.168.1.11
inservice
rserver host lnx2
ip address 192.168.1.12
inservice
rserver host lnx3
ip address 192.168.1.13
inservice
Please mark it if it answered you question then other users can use it as reference in the future.
Hope this helps!
Jorge

Cluster/load balance weblogic using L4 switch like Alteon

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.


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
          problem except fail-over)
          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.
          > > > > > > >>
          > > > > > > >>
          > > > > > > >
          > > > > > > >
          > > > > > >
          > > > >
          >

2 App servers in farm will be auto failover and load balanced?

Dear all,
We are going to setup following SharePoint farm:
2 WFE
2 APP
2 OWA
2 SQL with shared NAS
We will have hardware load balance in front of 2 WFE. From my understanding, the 2 WFE will detect which APP server is available and send the request there.
Hence, if APP1 is down, all traffic come from both WFE will be directed to APP2.
But I am not so sure about the part about load balance. If all the 8 server instance are working properly, the new request come from WFE2 will be sent to APP1 or APP2? Or it depends on which service application is asking?
In addition, we planned to run all search components on APP servers. But the 2 APP servers are both 16GB memory which is lower than suggested specification. I am considering whether I can assign all the search workload on APP2 while all the other on
APP1.
Thanks.
Mark

Here is a good artcicle on how SharePoint load balances service applications:
http://blogs.msdn.com/b/dtaylor/archive/2011/02/23/sharepoint-2010-service-application-load-balancer.aspx
Yes you can create APP02 as search server but then service apps will not be redundant , so it would be better to run all the service apps on both the servers and if you see any memory issues, then scale it later.
As per
http://technet.microsoft.com/en-us/library/651dba4d-8751-4bd8-9492-f2842b2e1177(v=office.15)#HW_Enterprise , 16 GB is recommended for application server so i think you should be okay unless there is very high load .
Amrita Talreja

How to load balance everything

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