Load balancer vs. Request Management

I am wondering what are the functionalities RM provides however load balancer. I was thinking that health based routing RM can provide however load balancer can't. But it seems that load balancer
can also provide this functionality , refer below link.<o:p></o:p>
http://social.msdn.microsoft.com/Forums/en-US/6be22098-bce8-4709-9403-4599b9599973/health-based-load-balancing?forum=sharepointadmin<o:p></o:p>
Could anyone please tell me what is a additional functionalities RM can provide compare to load balancer?
Regards Restless Spirit

As far i know RM will serve the same purpose of load balance with much more flexible rule for routing, e.g request throttling based routing, you can build more flexible routing logic based on various param available in RM.
You can take a look at this:-
http://social.technet.microsoft.com/wiki/contents/articles/16177.request-management-in-sharepoint-2013.aspx
Mark ANSWER if this reply resolves your query, If helpful then VOTE HELPFUL
INSQLSERVER.COM
Mohammad Nizamuddin

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Load balancing HTTP requests for an OC4J instance w/multiple JVMs

Hello everyone,
I am using OAS 10.1.3.1 and wish to load balance HTTP requests across an OC4J group of one or more OC4J instances, where each like named OC4J instance may have multiple JVMs or it may just have one JVM.
My mod_oc4j.conf file would contain the following directives :
Oc4jSelectMethod roundrobin:local
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In the degenerate case, I would like to have an OC4J group with a cluster size of one, and have that one OC4J instance have two or more JVMs. I would like to be able to receive a request within my web application, determine that the JVM that has been sent the request is the wrong JVM to process the request, and then call HttpServletResponse.sendRedirect("/xyz"). Then, when the browser receives the HTTP 302 response and issues the subsequent HTTP request, have that request sent to a different JVM than the previous JVM that issued the sendRedirect().
What I have seen is that the subsequent request is sent back to the same JVM that issued the sendRedirect(). I also call invalidate() against the HttpSession prior to calling sendRedirect(), but that does not seem to affect the behavior that I see.
In the full blown case, I would have an OC4J group with a cluster size > 1, and each of those OC4J instances would have at least one JVM. In that case, I wish the sendRedirect() call to allow the subsequent request to be sent to any one of the OC4J instances in the group, and any one of those JVMs within all of those OC4J instances.
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Thank you,
Doug

I should clarify that in the full blown environment, the OC4J instances that form a group will each be housed within a separate OAS instance that resides on its own machine.
So ideally, a request could be inbound to say OAS instance 1 on machine A, OC4J instance AA, JVM 2, and I need to force a redirect so that the request can actually be serviced by OAS instance 3 on machine C, OC4J instance AA, JVM 1, and I need to be able to call sendRedirect() against an HttpServletResponse from within a JVM until the subsequent request from the browser, Internet Explorer in my case, is serviced by that JVM.
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Load Balancing HTTP requests to ABAP App Servers options?

Looking at SAP Documentations, SAP recommends to use the Web Dispatcher to load balance HTTP requests to multiply ABAP App servers.
My question is that the only solution? or can we use hardware such as the F5 BigIP to perform the same job?
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Further details, case studies and deployment guides on;
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F5 certification information on SAP Website
http://www.sap.com/partners/directories/SoftwareISVSolutions.epx?context=21B87D61C0F646A22B2A6DB254A010CA8C9C141B7529F029910FE6FF9EEEC5A701BF20EED61AC07159D98BAA068EBE1B8C5C7665EA2226374E942CF1D2A49D20AB1BFDFA1E0B68EC41E3058F04A85F105D5002CF1A11383C905D9FE5DDB951251A4B574B0BBE58309F67667A3B95877FEF85F1EF8B2C1A9F6FBA3BF5066D9534%7c01518B8BD6BF02F55A5A72E5947F2C45
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Load Balancing DNS requests

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You could the information in this doc to configure health checks. But I am not too sure about the redirection and load balancing for telnet traffic. May be someone else could help.
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Load balancing outbound requests from OAG

Hi,
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Roberto

Hi,
By adding a remote host you can achieve load balancing. So make up a "fake" host that should not exist just not to collide with any actual service, add that host as a remote host and then add the IP's in the list of the of load balancing. Us the fake host in your connection filter and the gateway will automatically replace it host with a correct IP from the load balancing list.

Load balancing of Access Manager

Hi,
I 'm using 2005Q1 Messaging , Access Manager and Delagted Admin. Every thing is working fine. Now I need to add another Access Manager on a separate machine for load balancing. Plz let me know :
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Weblogic 8.1 Enable Load Balancing with Node Manager

Hi All,
Please provide any guidelines on how to enable Load Balancing in Bea Weblogic 8.1
I have configured *1 Admin Server* with *4 Managed Servers* on a single machine each having different port.
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Review the document How to Implement Load Balancing on SAP BusinessObjects Planning and Consolidation, version for SAP NetWeaver

Load Balancer for Access Manager

Which load balancer can we use for Access Manager?
Please give me some advice. Thank you in advance.

Jerry,
the doc url u posted has wrong information. See ticket 64634727.
The steps listed in this doc donot work.
I have successfully configured loadbalancing with Sun LB plugin that comes with AppServer.
Here is what I did....
LBplugin(on WS6.x)-----> AM1 and AM2.
LB vip : am-lb.sun.com
am1 : am1.sun.com
am2: am2.sun.com
The steps I followed are :
1. add the LB vip to orginatination-alias,
2. donot add the LB vip to platform as stated in the doc. jst add am1 and am2 hosts to platform.
3. update /etc/opt/SUNWam/config/AMConfig.properties and update only the following attrib. Donot touch any other attrib.
com.sun.identity.server.fqdnMap[LB-vip]=LB-vip
for ex:
com.sun.identity.server.fqdnMap[lb.am.sun.com]=lb.am.sun.com
The doc u listed is misleading and needs to be taken down.
See ticket that I mentioned above. I wasted like 4 weeks trying to get this working and in the end it turned out to be a bad documentation.
V

Please provide vShield Manager Server Load Balance values

Hi All:
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Please provide these value:
1. Throughput      Mbps
2. Web port 80 server load balance connections:
3. SSL port 443 server load balance connections:
Thanks
BR.
                        Vincent

Hi Vincent,
Can you please eloborate your question ?

WAN Load-Balancing and multi VLAN design

Hello,
I need some help to define the design of a specifi LAN-WAN network.
1) There are 2 independant WAN entries (they have their own ISP-managed router)
2) I need to load-balanced the requests over the 2 WAN
3) If possible, the load-balancer must be redundant (GLBP ?)
4) On the LAN itself, there must be 15 different VLAN
5) We also need a DHCP solution (also redundant if possible) to provide IP to these VLAN, with unique gateway (the load-balancer)
What do I need to implement this configuration ?
And is it possible to configure with as much GUI as possible ?
Thanks in advance for your help.

Dear Mike,
Thank you and welcome to the Small Business Support Community.
It is possible to configure load balancing with NAT, however in this case, remote internet servers will potentially see sessions from remote hosts behind the SRP541W coming from different source IP addresses (the WAN IP addresses), causing the sessions to be reset unexpectedly.
The Policy Routing setting you setup is exactly what I would do in your case.
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Kind regards,
Jeffrey Rodriguez S. .:|:.:|:.
Cisco Customer Support Engineer
*Please rate the Post so other will know when an answer has been found.

Could not retrieve Enterprise Global Template - Load balancer issue

Hi,
We have 4 Project Server 2010 servers. The 4 web servers are load balanced by networking team with sticky session configured.
When we try to connect to the Project Server using MPP 2007 SP2, it fails saying 'Could not retrieve Enterprise Global template'. It works perfect when we point to a specific server by specifying the IP address for server name in the 'hosts'
file.
Earlier we observed some errors in the event viewer related to the SharePoint's internal load balancer for which restarted the 'Project Server Application' on each web server and it got fixed.
Now, the only entries that we see related to load balancer are as mentioned below as Information (not errors).
SharePoint Web Services Round Robin Service Load Balancer Event: Initialization
Process Name: w3wp
Process ID: 15080
AppDomain Name: /LM/W3SVC/539065287/ROOT-1-130462463500778047
AppDomain ID: 2
Service Application Uri: urn:schemas-microsoft-com:sharepoint:service:ae7c7ee5c09b4e8198bdbb1ecb8c1c1b#authority=urn:uuid:9f626d347784423eb14bde4a1f4d13fc&authority=https://lonms12546:32844/Topology/topology.svc
Active Endpoints: 4
Failed Endpoints:0
Endpoint List:
http://lonxxx2532:32843/ae7c7ee5c09b4e8198bdbb1ecb8c1c1b/PSI
http://lonxxx2545:32843/ae7c7ee5c09b4e8198bdbb1ecb8c1c1b/PSI
http://lonxxx2546:32843/ae7c7ee5c09b4e8198bdbb1ecb8c1c1b/PSI
http://lonxxx2566:32843/ae7c7ee5c09b4e8198bdbb1ecb8c1c1b/PSI
Could the issue be due to network load balancer?
Could the issue be due to Sticky session configuration on the load balancer.?
How can we get to the root cause of the issue?
Which logging category should we set to 'Verbose' that can give us some hint.
Update: We tried to capture the requests through fiddler and observed that when fiddler is running on the client computer then the connection works perfectly fine even through the load balancer. Probably fiddler is reformatting the SOAP
envelop of the web service requests the way it should before sending the request to the server.
If we do not run fiddler and run some other similar tool (like Charles) then it again gives the issue and the request stucks at /PWA/_vti_bin/psi/winproj.asmx
We ran Wireshark on the servers and found the following for that web service call:
[TCP Previous segment not captured] Continuation or non-HTTP traffic.
Please let me know if someone could provide any hint what can be done next.
Regards, Amit Gupta

There are several ways to configure your load balancer. I would suggest that you work with the network engineer, the load balancer vendor and your project administrator to resolve this issue.
Basically you need URL to be resolved correctly. Also, I don't believe PS2007 did a good job handling load balancing, so you may need to bring someone in good with IIS and see they can tweek IIS to manage the cache better.
As I go back and look at your analysis, I think you should probably look at upgrading to Project Server 2013. They made some improvement in load balancing and the management of distributive cache.
I assume you have 4 WFE because you have thousands of project users. Roughly how many you have? Over 1000, over 5000
Have you tried to see if using two load balancing work? How about just one front end. I often see companies scaling SharePoint and Project server to extremes.
Michael Wharton, MVP, MBA, PMP, MCT, MCTS, MCSD, MCSE+I, MCDBA
Website http://www.WhartonComputer.com
Blog http://MyProjectExpert.com contains my field notes and SQL queries

Webcache load balancing - Login issue

Hi,
We have configured load balancing between two managed server using web cache. The load balancing is working fine. But the problem is, after login to our application deployed on both managed servers, if we stop the managed server currently processing the request and start second managed server then the current session is not applicable for second managed server. We are logged out of the application for any further request. Even if the second managed server is already running, we are logged out. The session binding has been configured to JSESSIONID and cookie based. Please let us know how we can make the same session applicable for another server as well so that users are not logged out if the server processing the request goes down. This sounds like configuring some failover settings but i am not able to find it out.
Thanks

Does your application require session binding?
You may want to contact Oracle Support to review your configuration setttings.

HttpClusterServlet Load Balancing Problem

          Hi,
          I have a problem with LoadBalancing and HttpClusterServlet.
          I have 2 boxes, with a clustered application, deployed on 2 managed servers
          box 1 with adminServer and and a managed server (managed1)
          box 2 with second managed server (managed2)
          on box 1 I have another managed server, which hosts the HttpClusterServlet application
          The cluster is made up of managed1 & managed2, and httpClusterServlet is configured
          to send requests to boths the managed servers in the cluster.
          When I run some tests against the httpClusterServlet web application to see how
          it load-balances requests, I can see that all the requests are redirected just
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          If I stop managed1, and run some tests, I can see that httpCluster every time
          tries to contact managed1 first, and since it's down, sends the requests to managed2(handles
          failover correctly).
          If I move the httpClusterServlet application to another box, let's call it box
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          I would like to know if httpClusterServlet has some kind of "server affinity"
          logic (?) or I'm missing something in the cluster configuration (even if I can't
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          why?
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Only from load balancing point of view cluster is not really needed.
apart from session replication and failover capabilities, few more benefits are there with clustering only if you are using a web server also.
Stuck threads can be due to lot's of problems like application issues, load issues etc, So first make sure you are getting stuck thread on both servers or only on one, if on one, then in this case your load balancing not working properly and sending more load to that server, and if you are getting stuck threads on both then try to add one more managed server.
Regards
Mukesh Negi
http://weblogicserveradministration.blogspot.com

Best way for HTTP load balancing in OSB

Hi everybody,
We have setup an OSB cluster and we need to load balance HTTP requests across managed servers. Looking for info about load balancing in OSB I found that there are mainly two options: using a hardware load balancer or a software solution like Weblogic HttpClusterServlet. At the moment we have no hardware balancer available so we will have to take the software option. I found some articles about configuring HttpClusterServlet like http://redstack.wordpress.com/2010/12/20/using-weblogic-as-a-load-balancer.
But I have a question about this configuration. If we use a managed server as an HTTP proxy that balances requests between OSB managed servers, what would happen if this server goes down? I think one of the main goals of a clustered deployment is avoiding a single point of failure but with that setup all requests would depend on the availability of the proxy managed server.
Could you recommend us a setup for implementing load balancing in OSB?
Thank you in advance,
Daniel.

Load balancing in a cluster for http requests can be achieved using atleast 4 different ways:
(1)- use a hardware load balancer like F5 BigIP LTM
(2)- use a web server with weblogic plugin to frontend the cluster
(3)- use weblogic with HTTPClusterServlet
(4)- use DNS round robin - this works if you have managed servers running on 2 machines (say mach1, mach2) but on the same port. HTTP clients use hostname 'mach' to access the URL's and the dns does a round robin name resolution of mach to mach 1 and mach2 IP addresses..
All the options except (1) achieve only load balancing and not auto failover on all instances.. Hardware load balancers has the extra feature of probing [ sending periodic pings to the targets] , by which it can detect whether the target resource is alive and if not send the traffic to other nodes which are alive.. this is why hardware load balancers are worth their investment..
other options may work if client is coded to do retrying on failure.. so on 2nd or subsequent attempt, the routing is done to the machine which is alive..
For options (1),(2) and (3), you also need some redundancy of load balancing device ( web server, weblogic or hardware load balancer) to prevent single point of failure.. Hardware load balancers are usually deployed in redundant pairs to achieve this..
Edited by: atheek1 on 22/11/2011 15:31

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.

Load balancing to JDBC connection pool

from http://e-docs.bea.com/wls/docs61///////cluster/overview.html
"WebLogic Server provides limited load balancing support for managing JDBC
connections in a cluster. If you create an identical JDBC DataSource in each
clustered WebLogic Server instance and configure those DataSources to use
different connection pools, the cluster can support load balancing for JDBC
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balancing policies for accessing connection pools. If one of your connection
pools runs out of JDBC connections, the load balancing algorithm may still
direct connection requests to the empty pool."
How is this different from creating one connection pool with one datasource
and targetting the cluster. Are they talking about load-balancing to
different databases, or different servers in WLS. from a servlet or from a
client side app?
Can anyone elaborate?
Thanks in advance.

hi,
without knowing the entire set of requirements or the motivation behind doing this, a few words from me
this is usually done transparently to the applications server, that is having eg. Oracle instances mirroring eachother for extreme high-availability requirements.
1. I would have taken the liberty of calling this business funcionality and let my middleware do the implementation of this. The most elegant solution would probably be to call the master DB for the CUD operation, then post a message to a queue letting the slave DB be updated asynchronously. If the message could not be sent, throw an exception and have the entire operation rolled back.
If however this must happen realtime and transactions must be consistent, there are a few points to consider. And the quieing bit would not work.
if this is something that should be done for all Create, Update and Delete operations, an intercepting JDBC driver could do the trick. Although there are all sorts of different problems that could arise from this, for starters, at least one of the DBMS involved here should be XA compliant. If the entire transaction should be XA compliant, both DBMS must be XA compliant. Next as for the transaction towards the "mirroring" DBMS you would have to do all the transaction stuff your self.
For an example of an intercepting JDBC driver, I found thisone
http://media.datadirect.com/download/docs/jdbc/jdbcref/spy.html
I would guess that there are quite a few more.
- [url http://blog.thej2eestruggle.com]Anders Mathisen
Edited by anders.mathisen at 01/21/2007 2:53 PM

Load balancer vs. Request Management

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