Apache load balance doubt

Hi,
We have four application nodes in which apache and forms sevices are running in all the nodes. Our apps version is 11.5.10.2.
I really doesn't know how the load is getting balanced among these nodes. Can some one pleas explain how the user connections are being distributed, I mean how apache load balance works and how to get this info.
Your explanation is really appreciable.
Regards,
Siva

Siva,
Contact your Network/Sysadmin teams and they should answer your question.
In addition to the doc referenced above, please see (How To Check Session Persistence On BigIP F5, Cisco Ace, Citrix Netscaler or Radware AppDirector Load Balancer Appliances [ID 601694.1]).
Thanks,
Hussein

Similar Messages

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
          My questions are:
          (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.
          (2) Weblogic cluster will have nothing to do with load balancing? The only benefit I get of configuring weblogic cluster is session replication, right?
          (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?
          See in WebSphere the edge component will handle the load balancing and through it I can assign load weights for each appserver instance.
          (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.
note that we have had trouble with keep alives ON and load balancing. we had to turn keep alives off to get load balancing working.
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.

Oracle service bus, endpoint load balancing

I was create configuration like this (dot instead of whitespace):
............................______osb1
Client ---- Apache LB
...........................\______osb2
Apache Load Balancer (Apache LB) have "Round-robin" load balancing algorithm
Servers "osb1" and "osb2" are in the cluster.
Proxy Service (PS) route to Business Service (BS).
BS have two endpoints (EP1, EP2). Load balancing algorithm in properties of BS is "none".
When i send request to Apache LB then i get info from like this order: EP1, EP2, EP1, EP2...
Why load balancing beetween endpoints working instead get info from endpoint which is first in endpoint's list ?
Edited by: 915814 on 19.07.2012 13:10
i was check via tcpdump. Packets going beetween nodes, but messages going only to first node. This i can see in Dashboard at Service Health tab in business service properties. So "none" in Load Balancing algorithm is work.

Hi Adel,
Customization file will be the best solution for your problem. You may generate a environment specific customization file. To know more, please refer -
http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/consolehelp/customization.html#wp1129087
Simplest solution would be to generate a customization file and replace the existing URI's with the required one's using replace all option of textpad. Run this customization file at target environment, after importing the OSB configuration.
Regards,
Anuj

WLS 8.1.4 cluster is does not load balance correctly

Hi WLS gurus!
I have a problem with my apache load balancer....
it seems apache does not see all WLS instances with DynamicServerList ON!
all connections come in to, in my case, instance 2...
my cluster runs on 2 separate machines..
any ideas? problem with DNS maybe?
thanks
Michael

Hi,
Go through the following link and check whether you configured load balancing settings correctly or not.
http://e-docs.bea.com/wls/docs81/cluster/load_balancing.html
Regards
Anilkumar kari

Weblogic Apache Plugin - Load Balancing

Hi,
I have two Apache servers each with the WLS Apache Plugin installed. These sit in front of two WL servers each having two managed servers.
Each plugin is setup with the list of servers as follows:
<IfModule mod_weblogic.c>
          WebLogicCluster Server_1:7030,Server_1:7040,Server_2:7010Server_2:7020
          Debug           OFF
          WLLogFile logs/cws_proxy.log
          WLTempDir "logs"
          DebugConfigInfo OFF
          WLProxySSL On
          KeepAliveEnabled ON
          KeepAliveSecs 15
          MatchExpression *.xhtml
          MatchExpression *.jsp
     </IfModule>
Look OK so far?
Anyway, looking at the WL access.log I can see that server 1 is only receiving requests from one Apache, and the same goes for the other access.log. So... it's not really load balancing is it?
Can anyone offer any advice or comments on my plugin configuration or why it is not load balancing properly?
Much Appreciated,

I came across this link which says ‘WebLogic Server does not always load balance an object’s method calls.” And has few more details about the load balancing strategy of weblogic.
http://download.oracle.com/docs/cd/E11035_01/wls100/cluster/load_balancing.html#wp1026599
http://download.oracle.com/docs/cd/E11035_01/wls100/cluster/load_balancing.html
This might help.

Apache plug-in won't load balance requests evenly on cluster

I can't seem to get the Apache plug-in to actually do round-robin load balancing
of HTTP
requests. It does random-robin, as I like to call it, since the plug-in will usually
hit all the
servers in the cluster but in a random fashion.
I've got three managed servers:
192.168.1.5:8001 (WL6 on Linux) 192.168.1.2:8001 (WL6 on Linux) 192.168.1.7:8001
(WL6 on Linux)
Admin server on 192.168.1.7:7000 (WL6 on W2k)
My Apache server is 1.3.9 (RedHat SSL) on 192.168.1.52.
The log file for each servers has something like this:
####<Apr 19, 2001 1:18:54 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<main> <system> <> <000102> <Joined cluster cluster1 at address 225.0.0.5 on port
8001>
####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<ExecuteThread: '9' for queue: 'default'> <> <> <000127> <Adding
3773576126129840579S:192.168.1.2:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster> ####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster> <neptune>
<cluster1server1> <ExecuteThread: '11' for queue: 'default'> <> <> <000127> <Adding
-6393447100509727955S:192.168.1.5:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster>
So I believe I have correctly created a cluster, although I did not bother to
assign
replication groups for HTTP session replication (yet).
The Apache debug output indicates it knows about all three servers and I can see
it
doing the "random-robin" load balancing. Here is the output:
Thu Apr 19 00:20:53 2001 Initializing lastIndex=2 for a list of length=3 Thu Apr
19
00:20:53 2001 Init Srvr# [1] = [192.168.1.2:8001] load=1077584792 isGood=1077590272
numSk ip=134940256 Thu Apr 19 00:20:53 2001 Init Srvr# [2] = [192.168.1.5:8001]
load=1077584792 isGood=1077590272 numSk ip=134940256 Thu Apr 19 00:20:53 2001
Init Srvr# [3] = [192.168.1.7:8001] load=1077584792 isGood=1077590272 numSk
ip=134940256 Thu Apr 19 00:20:53 2001 INFO: SSL is not configured Thu Apr 19
00:20:53 2001 Now trying whatever is on the list; ci->canUseSrvrList = 1 Thu Apr
19
00:20:53 2001 INFO: New NON-SSL URL Thu Apr 19 00:20:53 2001 general list: trying
connect to '192.168.1.7'/8001 Thu Apr 19 00:20:53 2001 Connected to 192.168.1.7:8001
Thu Apr 19 00:20:53 2001 INFO: sysSend 320 Thu Apr 19 00:20:53 2001 INFO:
Reader::fill(): first=0 last=0 toRead=4096 Thu Apr 19 00:21:06 2001 parsed all
headers
OK Thu Apr 19 00:21:06 2001 Initializing lastIndex=1 for a list of length=3 Thu
Apr 19
00:21:06 2001 ###Response### : Srvr# [1] = [192.168.1.5:8001] load=1077584792
isGood=1077 546628 numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response###
: Srvr# [2] = [192.168.1.2:8001] load=1077584792 isGood=1077 546628
numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response### : Srvr# [3] =
[192.168.1.7:8001] load=1077584792 isGood=1077 546628 numSkip=1077546628 Thu Apr
19 00:21:06 2001 INFO: Reader::fill(): first=0 last=0 toRead=4096
Basically, the lastIndex=XXX appears to be random. It may do round-robin for 4
or 5
connections but then always it resorts to randomly directing new connections.
This is what the configuration looks like using the plug-in's
/weblogic?__WebLogicBridgeConfig URL:
Weblogic Apache Bridge Configuration parameters:
WebLogic Cluster List:
1.Host: '192.168.1.2' Port: 8001 Primary
General Server List:
1.Host: '192.168.1.2' Port: 8001
2.Host: '192.168.1.5' Port: 8001
3.Host: '192.168.1.7' Port: 8001
DefaultFileName: ''
PathTrim: '/weblogic'
PathPrepend: '' ConnectTimeoutSecs:
'10' ConnectRetrySecs: '2'
HungServerRecoverSecs: '300'
MaxPostSize: '0'
StatPath: false
CookieName: JSESSIONID
Idempotent:
ON FileCaching:
ON ErrorPage: ''
DisableCookie2Server: OFF
Can someone please help to shed some light on this? I would be really grateful,
thanks!
Jeff

Right - it means that the only configuration which can do perfect round-robin is a
single plugin (non-Apache, or single-process Apache) - all others essentially do random
(sort of, but it can skew test results during first N requests).
Robert Patrick <[email protected]> wrote:
Dimitri,
The way Apache works is that is spawns a bunch of child processes and the parent process
that listens on the port delegates the processing of each request to one of the child
processes. This means that the load-balancing dome by the plugin before the session ID is
assigned does not do perfect round-robining because there are multiple copies of the plugin
loaded in the multiple child processes. This situation is similar to the one you would get
by running multiple proxy servers on different machines with the NES/iPlanet and IIS
plugins.
As I pointed out in my response to Jeff, attempting to address this problem with IPC
machanisms would only solve the single machine problem and most people deploy multiple
proxy servers to avoid a single point of failure...
Hope this helps,
Robert
Dimitri Rakitine wrote:
Hrm. This is strange - I thought that all the information nesessary for a
'sticky' load-balancing (primary/secondary) is contained in the cookie/session info,
so, the particular plug-in implementation should not make any difference. For
load-balancing - statistically, given large enough sampling base, Apache plug-in
should perform just a well as NS one (unless apache is somehow misconfigured and
calls fork() for each new request).
Jeff Calog <[email protected]> wrote:
Robert,
Thanks for the sanity reply, you are definitely right. I used Netscape 3.0 on
Win2k and it did perfect round-robin load balancing to my servers.
<raving>
BEA - ARE YOU LISTENING? STOP TELLING PEOPLE YOUR APACHE PLUG-IN IS A VIABLE
LOAD BALANCING SOLUTION! It's worthless for load balancing!
</raving>
In some tests, as many as 90% of my connections/requests would be sent to a single
server. There should be something in the release notes like "By the way, the
Apache plug-in is only advertised as doing round-robin load balancing, in reality
it doesn't work worth a darn".
I'm surprised they don't used shared memory or some other technique (pipes, sockets,
signals, writing to /tmp, anything) for interprocess communication to fix that.
Jeff
Robert Patrick <[email protected]> wrote:
Yes, the problem lies in the fact that Apache uses multiple processes
instead of
multiple threads to process requests. Therefore, you end up with multiple
processes all
with the WebLogic plugin loaded into them (and they cannot see one another)...
Hopefully, Apache 2.0 when it comes out will allow the plugin to do a
better job...
Jeff Calog wrote:
I can't seem to get the Apache plug-in to actually do round-robin loadbalancing
of HTTP
requests. It does random-robin, as I like to call it, since the plug-inwill usually
hit all the
servers in the cluster but in a random fashion.
I've got three managed servers:
192.168.1.5:8001 (WL6 on Linux) 192.168.1.2:8001 (WL6 on Linux) 192.168.1.7:8001
(WL6 on Linux)
Admin server on 192.168.1.7:7000 (WL6 on W2k)
My Apache server is 1.3.9 (RedHat SSL) on 192.168.1.52.
The log file for each servers has something like this:
####<Apr 19, 2001 1:18:54 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<main> <system> <> <000102> <Joined cluster cluster1 at address 225.0.0.5on port
8001>
####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<ExecuteThread: '9' for queue: 'default'> <> <> <000127> <Adding
3773576126129840579S:192.168.1.2:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster> ####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster><neptune>
<cluster1server1> <ExecuteThread: '11' for queue: 'default'> <> <><000127> <Adding
-6393447100509727955S:192.168.1.5:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster>
So I believe I have correctly created a cluster, although I did notbother to
assign
replication groups for HTTP session replication (yet).
The Apache debug output indicates it knows about all three serversand I can see
it
doing the "random-robin" load balancing. Here is the output:
Thu Apr 19 00:20:53 2001 Initializing lastIndex=2 for a list of length=3Thu Apr
19
00:20:53 2001 Init Srvr# [1] = [192.168.1.2:8001] load=1077584792 isGood=1077590272
numSk ip=134940256 Thu Apr 19 00:20:53 2001 Init Srvr# [2] = [192.168.1.5:8001]
load=1077584792 isGood=1077590272 numSk ip=134940256 Thu Apr 19 00:20:532001
Init Srvr# [3] = [192.168.1.7:8001] load=1077584792 isGood=1077590272numSk
ip=134940256 Thu Apr 19 00:20:53 2001 INFO: SSL is not configured ThuApr 19
00:20:53 2001 Now trying whatever is on the list; ci->canUseSrvrList= 1 Thu Apr
19
00:20:53 2001 INFO: New NON-SSL URL Thu Apr 19 00:20:53 2001 generallist: trying
connect to '192.168.1.7'/8001 Thu Apr 19 00:20:53 2001 Connected to192.168.1.7:8001
Thu Apr 19 00:20:53 2001 INFO: sysSend 320 Thu Apr 19 00:20:53 2001INFO:
Reader::fill(): first=0 last=0 toRead=4096 Thu Apr 19 00:21:06 2001parsed all
headers
OK Thu Apr 19 00:21:06 2001 Initializing lastIndex=1 for a list oflength=3 Thu
Apr 19
00:21:06 2001 ###Response### : Srvr# [1] = [192.168.1.5:8001] load=1077584792
isGood=1077 546628 numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response###
: Srvr# [2] = [192.168.1.2:8001] load=1077584792 isGood=1077 546628
numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response### : Srvr#[3] =
[192.168.1.7:8001] load=1077584792 isGood=1077 546628 numSkip=1077546628Thu Apr
19 00:21:06 2001 INFO: Reader::fill(): first=0 last=0 toRead=4096
Basically, the lastIndex=XXX appears to be random. It may do round-robinfor 4
or 5
connections but then always it resorts to randomly directing new connections.
This is what the configuration looks like using the plug-in's
/weblogic?__WebLogicBridgeConfig URL:
Weblogic Apache Bridge Configuration parameters:
WebLogic Cluster List:
1.Host: '192.168.1.2' Port: 8001 Primary
General Server List:
1.Host: '192.168.1.2' Port: 8001
2.Host: '192.168.1.5' Port: 8001
3.Host: '192.168.1.7' Port: 8001
DefaultFileName: ''
PathTrim: '/weblogic'
PathPrepend: '' ConnectTimeoutSecs:
'10' ConnectRetrySecs: '2'
HungServerRecoverSecs: '300'
MaxPostSize: '0'
StatPath: false
CookieName: JSESSIONID
Idempotent:
ON FileCaching:
ON ErrorPage: ''
DisableCookie2Server: OFF
Can someone please help to shed some light on this? I would be reallygrateful,
thanks!
Jeff
Dimitri--
Dimitri

Clustering not Load balancing on solaris with apache

apache weblogic plugin does not do round-robin , it's kind of random when
          direct the request to the appserver. anyone has seen this problem?
          weblogic5.1 sp9. solaris 2.7 jre1.3.1 rc2


Actually, the random load-balancing when using Apache is caused by the fact
          that Apache (<2.0) spawns multiple processes, so single Apache instance
          will have several plug-in instances running.
          Mike Reiche <[email protected]> wrote:
          > You are using the weblogic plug-in, aren't you?
          > Only new requests are round-robinned. A second request from the same browser
          > is sent to the same server it hit the first time (sticky load-balancing).
          > Mike
          > "Tony Lu" <[email protected]> wrote:
          >>apache weblogic plugin does not do round-robin , it's kind of random
          >>when
          >>direct the request to the appserver. anyone has seen this problem?
          >>
          >>weblogic5.1 sp9. solaris 2.7 jre1.3.1 rc2
          >>
          >>
          Dimitri

Apache HTTP proxying for load balancing only to a group of non-clustered WL servers

          Hi,
          We're running WL Server 6.1 SP 2 on Solaris 2.8.
          For the Apache HTTP proxy plugin, if you use the WebLogicCluster http.conf option,
          do the WL servers you want to load balance across have to be part of a WebLogic
          cluster (if you are prepared to do without failover, as I know it would need to be
          a proper WL cluster to replicate session info for failover). Can you load balance
          across a group of non-clustered WL servers, and maintain the user session to the
          one WL server so that it doesn't switch between servers on alternate requests for
          the same user session, or must the servers be configured as a WebLogic cluster?
          Paul
          We find that if you have a collection of WL servers that are not configured as a
          cluster, that it will load balance alternate requests to each server, but it will
          not pin a user to a single machine according to their session so for 2 servers, 2
          differetn sessions get created, one on each machine.
          Is this because it doesn't normally do this, but sends the user alternately to a
          primary then secondary which works in a cluster because the session is replicated.
          I thought the secondary was only used when the primary failed.


We're running WL Server 6.1 SP 2 on Solaris 2.8.          >
          > For the Apache HTTP proxy plugin, if you use the WebLogicCluster http.conf
          option,
          > do the WL servers you want to load balance across have to be part of a
          WebLogic
          > cluster (if you are prepared to do without failover, as I know it would
          need to be
          > a proper WL cluster to replicate session info for failover). Can you load
          balance
          > across a group of non-clustered WL servers, and maintain the user session
          to the
          > one WL server so that it doesn't switch between servers on alternate
          requests for
          > the same user session, or must the servers be configured as a WebLogic
          cluster?
          You don't have to use the clustering option. To get failover, you'll have to
          use the JDBC persistence option of WL.
          > We find that if you have a collection of WL servers that are not
          configured as a
          > cluster, that it will load balance alternate requests to each server, but
          it will
          > not pin a user to a single machine according to their session so for 2
          servers, 2
          > differetn sessions get created, one on each machine.
          >
          > Is this because it doesn't normally do this, but sends the user
          alternately to a
          > primary then secondary which works in a cluster because the session is
          replicated.
          > I thought the secondary was only used when the primary failed.
          The primary/secondary stuff requires clustering. If Apache continues to
          "load balance" after the first request, you need to either use JDBC session
          persistence or use a different load balancer (like mod_jk for Apache or a
          h/w load balancer with support for sticky).
          Peace,
          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com/coherence.jsp
          Tangosol Coherence: Clustered Replicated Cache for Weblogic
          "Paul Hammond" <[email protected]> wrote in message
          news:[email protected]...
          >

Disable Apache Plugin Load Balancing

When proxying requests with the Weblogic Apache Proxy Plugin, can load balancing
be disabled? We do not want to load balance between Weblogic servers since the
Apache server is running on the same box as Weblogic. However, we still very
much want the failover capabilities. Is it possible to disable the load balancing
and preserve the failover capabilities?
Thanks in advance.
Brian Husted

"Brian Husted" <[email protected]> wrote:
>
When proxying requests with the Weblogic Apache Proxy Plugin, can load
balancing
be disabled? We do not want to load balance between Weblogic servers
since the
Apache server is running on the same box as Weblogic. However, we still
very
much want the failover capabilities. Is it possible to disable the load
balancing
and preserve the failover capabilities?
Thanks in advance.
Brian HustedHello!
I have also the same problem. Have you found out anything?
I contact the bea-suppport, but we haven't found a solution yet.
Greetings Hans

Doubt on Hardware Load Balancing?

Hi Community,
I think there are two ways to perform the load balancing.One of them is proxy and other one is hardware load balancing.I have know something about the Proxy related Load balancing using Apache,oracle HTTP server and others.My question,I don't know about the single bit of Hardware load balancing,i refer the some sites but it is not benefits for me.So please guide me to configure the hardware load balancing for my cluster..
Regards,
Ove..

Hi,
Find the document for configuring the hardware load balancer with Weblogic
1.F5 load balancer
https://www.f5.com/pdf/deployment-guides/bea-bigip45-dg.pdf
2.Cicso
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/App_Networking/weblogicdg.html
http://www.cisco.com/en/US/solutions/ns340/ns517/ns431/ns432/net_design_guidance09186a0080908169.pdf
Additional Info
http://pauldone.blogspot.in/2013/04/load-balancing-t3-initial-context.html
Best Load Balancing Hardware | TechSource
Oracle Weblogic Server Administration: Load Balancing in Weblogic Server
http://www.broadband-testing.co.uk/download/ZeusBEAWebLogic.pdf
http://www.ateam-oracle.com/using-weblogic-as-a-load-balancer/
Hope it helps

Apache 2 + Sun Java 8.1 load balancer connector dies under load

Hi,
We are testing the apache module "mod_loadbalancer.so" for connecting an apache 2 to a Sun Java 8.1 App Servers running on a different box.
When we perform a basic load testing (60 concurrent users) we are experiencing a very high CPU usage: apache's CPU consumption is around 30-40%per child.
This generates or very slow responses from the App Server or at some point the apache thread die, and therefore, lose of connection to the app server, generating an internal server error.
If we perform this same test directly to the App Server httpd listener, it bahaves fine. We have also performmed the same test againt static content of apache, and again the everything is ok, we even have tried using iWS instead of apache, and the CPU does not go over 4%, so it looks like the problem resides on the apache connector.
Have any of you experienced something similar?
This is the basic conf:
Web Server:
SunOS 5.9 Generic_118558-19 sun4u sparc SUNW,UltraSPARC-IIi-cEngineApache 2.0.54 with MPM worker (threads support) compiled with gcc
apache:~>/apps/WebServer/apache/2.0/bin/httpd -v
Server version: Apache/2.0.54
Server built:   May 23 2006 07:10:19
apache:~>/apps/WebServer/apache/2.0/bin/httpd -l
Compiled in modules:
core.c
mod_access.c
mod_auth.c
mod_log_config.c
mod_env.c
worker.c
http_core.c
mod_mime.c
mod_negotiation.c
mod_dir.c
mod_actions.c
mod_alias.c
mod_so.c
httpd.conf:
#                   Sun AppServer Load Balancer Configuration                          #
LoadFile /usr/lib/libCstd.so.1
LoadModule apachelbplugin_module /apps/WebServer/apache/2.0/modules/mod_loadbalancer.so
config-file /apps/WebServer/apache/apache2-sunsecd1/conf/loadbalancer.xml
locale en
loadbalancer.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE loadbalancer PUBLIC "-//Sun Microsystems Inc.//DTD Sun ONE Application Server 7.1//EN" "sun-loadbalancer_1_1.dtd">
<loadbalancer>
<cluster name="sunsecd1">
    <instance disable-timeout-in-minutes="30" enabled="true" listeners="http://appserver:38082" name="sunsecd1"/>
    <web-module context-root="petstore" disable-timeout-in-minutes="30" enabled="true"/>
    <web-module context-root="opc" disable-timeout-in-minutes="30" enabled="true"/>
    <web-module context-root="admin" disable-timeout-in-minutes="30" enabled="true"/>
    <web-module context-root="supplier" disable-timeout-in-minutes="30" enabled="true"/>
    <health-checker interval-in-seconds="30" timeout-in-seconds="10" url="/"/>
</cluster>
<property name="response-timeout-in-seconds" value="60"/>
<property name="reload-poll-interval-in-seconds" value="60"/>
<property name="https-routing" value="false"/>
<property name="require-monitor-data" value="false"/>
<property name="route-cookie-enabled" value="true"/>
</loadbalancer>

Hi Balaji,
The Apache webserver runs on Solaris 9 on a Netra T1:
$ /usr/platform/`uname -i`/sbin/prtdiag
System Configuration: Sun Microsystems sun4u Netra t1 (UltraSPARC-IIi 440MHz)
System clock frequency: 110 MHz
Memory size: 1024 Megabytes
========================= CPUs =========================
                    Run   Ecache   CPU    CPU
Brd CPU   Module   MHz     MB    Impl.   Mask
0     0     0      440     2.0   12       9.1
========================= IO Cards =========================
     Bus# Freq
Brd Type MHz   Slot Name                              Model
0   PCI-1 33     1   ebus
0   PCI-1 33     1   network-SUNW,hme
0   PCI-1 33     2   scsi-glm                          Symbios,53C875
0   PCI-1 33     3   network-SUNW,hme
0   PCI-2 33     1   pci-pci1011,22The Sun App Server is Sun Java System Application Server Enterprise Edition 8.1_02 (build b11-fcs)
Did I miss anything else?

Is it possible to use Apache with load-balancer ?

Hello,
I'd like to know if it's possible to set up a load-balancing solution made of: Apache Web Server + Hardware Load Balancer+ Cluster of Weblogic Nodes.
In the documents I see Apache server is used only with the HTTP Proxy plugin. But I'd like to use the hardware load balancer to ditribute load to Weblogic nodes.
Is it possible to do it ?
Thanks
Francesco

Hi,
The configuration you are talking about is possible. All the information is here http://edocs.bea.com/wls/docs81/cluster/load_balancing.html#1026240 , and here http://edocs.bea.com/wls/docs81/cluster/bigip.html#618892
Regards,
LG

Is apache reverse proxy server/F5 Load Balancer support to Sharepoint 2010

Hi ,
I have two tool for implement reverse proxy
-Apache reverse proxy
-F5 load balancer
Kindly let me know sharepoint 2010 support this,if support then how to configured.
Hasan Jamal Siddiqui(MCTS,MCPD,ITIL@V3),Sharepoint and EPM Consultant,TCS
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Thanks Sebastian,
Please let me know,I have only NTLM Authentication,we are not using FBS.
For NTLM authentication what we need to do.
Hasan Jamal Siddiqui(MCTS,MCPD,ITIL@V3),Sharepoint and EPM Consultant,TCS
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Session replication in oc4j load balancing not working ..

Hi All,
I have windows 2000 machine. I have installed 2 instances of oc4j running on ports 8888 and 8889. I started the loadbalancer.jar in the first instance, started the first oc4j instance and then started the second oc4j instance. I have a common application deployed on both instance1 and instance2 and that is nothing but out famous SessionServlet.
If I access this servlet using http://localhost:80/app/servlet/SessionServlet then I am getting a count as 1 . My loadbalancer that is started from first oc4j instance(running on port 8888) is showing that the request is routed to the first instance. I stopped my first instance1 and then again from the same browser/session/client if I access the same servlet using http://localhost:80/app/servlet/SessionServlet then still I am seeing the count as 1 instead of 2 . At this point my loadbalancer is showing that the request is routed to the second oc4j instance(running on port 8889) since first instance is stopped. So why am I seeing the count as 1 instead as 2.
Also,
1. Is it enough that we start the loadbalancer.jar in the first oc4j instance. What about the loadbalancer.jar in the second oc4j instance ?
2. We all know that Apache HTTP Server runs on port 80. But since I didnt[i]Long postings are being truncated to ~1 kB at this time.

thank you debu, I have one doubt . In the clustering/load-balancing documentation at metalink(doc id: 151717.1) it is said that in point 4b that we should add the tag <cluster-config /> to orion-web.xml file but this file will be created only after the web application is deployed and it is accessed atlest for one time. So is it that we should first deploy the web application and then access it for atlest one time then stop the server and add this tag .. or is there any other way workaround ?

DS to BW load balancing

Dear all,
I have a doubt regarding load balancing in PRD. Our team is loading data through DS 12.2.2.3 to SAP BW Master / transaction Infosources.
SAP BW system has five Application Servers / instances to balance the load. BW target data store is configured to connect to the Central Instance of SAP BW.
Since we are connected to the Central instance / application server of BW system from DS, will BW system be able to balance the load across multiple instances?
Since BW Server has multiple instances to balance the load, is there any way we can utilise these BW multiple instances from Data Services?
Can you share your thoughts on this? Appreciate your responses.
Regards,
Suneer.

Hi Suneer,
There are several ways how DS and BW can interact, so it might depend on what scenario you are using.
I can think of the following scenario's:
1. A DS job is executed from admin console and loads into a BW target datasource.
This should use any available server, according to load balancing settings. It is not possible to force the process to use a specific server.
2. A process chain starts an infopackage, which in turn starts a DS job
BW will use the server chosen at the time of scheduling, if everything is configured correctly and scheduled correctly it will use any avaialble server conform load balancing settings. You can set this to run on a specific server (but I would only recommend this in very special circumstances).
3. DS triggers a process chain
Again, BW will use the settings on the process chain.
4. BW runs an execution command, which starts a DS job
Well, this is not a relevant scenario as it does not update anything on BW - unless the execution command then runs a job which loads data into BW, which is described in scenario 1.
I hope this makes sense. Let me know if you have any other scenario's or concerns.
Can I just ask why you are concerned about this load balancing? I have not have load balancing problems with DS/BW but I have had plenty of problems around concurrent use of the RFC connection between DS/BW. 'Multithreading' was not supported until 12.2.3.2 and you mentioned you run on 12.2.2.3, so potentially this is a problem for you.
Jan.

Apache load balance doubt

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