LOAD BALANCING VM'S in a Cluster

Hi Guys,
I have 2 ESXi 5.5 in a cluster with HA and DRS Enabled .
One of the ESxi in the cluster is heavily loaded although it has enough ram and storage to create 2-3 VM's but not more than that.
Other ESXi is running just 3 VM's and has enough ram and storage.
Also i have certain constraints as well .
There is no shared Datastore .Both the ESXi have there own datastore thereby VMotion not an option.
All i want whenever There is a request to create VM's in Cluster , VM should be created on the ESXi with Less load (which has only 3 VM's Running).
I know this can be achieved by DRS but i believe for DRS there should be a shared datastore which i don't have.
I know this is a silly question but any answers will be appreciated.
Where i can find to configure memory of ESXi in a Cluster..If threshold is achieved ..Vm's will be created on new ESXi.
Thanks,
Tarun Gupta

Thanks Tim,
I am aware of EVC but it does not solve the Purpose. EVC will change host and datastore of an existing VM which has memory constraints on a particular
ESXI. It wont stop Creating VM on that Particular ESXi which is running on high load.
All i want Cluster to choose ESXi which has less load at the time of VM creation .Can you please tell me are there any memory threshold options in a cluster..i am not able to find them?.
Yes i will be deploying via vCO ..can you please tell me where and how can i script the Workload.
Thanks a lot
Tarun

Similar Messages

Is Load Balancer a Must for SOA Cluster

Hi,
We are trying to bring up a soa cluster of 4 soa_servers
We have deployed the code and seems to be picked up by all the soa_servers properly.
The issue we are facing is all the partner link references (which are internal composites in the cluster) is pointing to one of the soa server (i.e. the one we have used during deployment)
Because of this there is no load balancing happening and effectivly only one of the server is fully loaded.
If this is the expected behaviour, is a load balancer/proxy server a must for a soa cluster ?
Thanks,
Ajay....
Edited by: ajaykumar on Sep 6, 2010 8:54 AM

Dear All
Weblogic Server Cluster Domain by default WILL NOT have any Load Balancer and WILL NOT do any load balancing stuff. Any Weblogic Cluster should and must have some sort of Software or Hardware Load Balancer in front of WLS Cluster Domain. Most of the customers use open source Apache Http Server which is very simple configuration and works fine. See this below link for Apache details. Go back on this link to see other WebServers like IIS or Sun WebServer etc. You can use Hardware load balancer.
http://download.oracle.com/docs/cd/E14571_01/web.1111/e14395/apache.htm#CDEGCBAC
The basic steps are in one of the webservers configuration files, you specify the details of backend WLS clustered managed servers host and ports with comma separated. Now this Apache or any other WebServer runs at some host and port. Now this is the host and port that you need to configure for any WebServices WSDL URLs. Then load balancing will happen. So even though we do development say from JDeveloper we create WSDLs or WebServices client using single WLS Server Domain. So naturally that WSDL will have that domains host and port hardcoded. But when you export this webservice .war file and deploy in cluster env you have option to invoke which wsdl url. When we get the WebService Service Object, usually there are 2 constructors. One that take no parameters and internally it goes to the default wsdl url specified in the .wsdl file. Another constructor takes 2 parameters like wsdl url and QName for Service. If you see that service .java file generated when you create client jar for the WebService you will get an idea. So the point is in your client program use the second constructor and for wsdl url, use load balancers host and port and rest will be same. Infact you can put this wsdl url in .properties file also which goes under say WLS Domain folder. So for diff env like Test, QA, Prod etc you can have diff values for wsdl url in .properties file specific to that environment.
So bottom line for Load Balancing we do need external load balancer in front of Weblogic Cluster Domain.
Thanks
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Self-Signed Cert being advertised on load-balance ip for ASA VPN cluster

We recently saw an issue potentially related to CSCul61231 when a self-signed certificate was applied to the internal interface of the lan (inside) connection. For some reason, the public (outside) cluster ip address started handing out the self signed cert instead of the configured certificate. Lan interfaces certificates for either of the ASA's in the cluster were not effected - only the VIP. Even after removing the code, the issue still occurred until the cluster was broken. After re-connecting cluster issue did not come back. We are not using the 5500-X devices but instead 5550's. We do have 9.1.(x) running - I think 9.1.2, but not confident.
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ssl trust-point TrustPoint_X INSIDE vpnlb-ip ssl trust-point TrustPoint_X INSIDE
Thanks in advance!

Just wanted to follow up and confirm we have 9.1(5)12 running on the devices. A note in the bug report suggest a possible ip6 address is associated in some way. I want to also point out the devices have only ipv4 address assigned.
Anyone that can confirm this functionality would be greatly appreciated.
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Load balancing to a WLS 8.1 cluster with BigIP 9.0

We are experiencing a problem load balancing to our 8.1 cluster using f5's 1500 with BigIP 9.02. The cluster is not configured with any failover capability; we are have configured the BigIP with active cookie insertion persistence; all is well untill we take down one of the nodes in the cluster; any session associated with that node via the load balancer is bounced repeatedly between the two remaining nodes; the only solution appears to be to close all browser instances and open a new one. Has anyone experienced this behavior and have some suggestions ?

We are experiencing a problem load balancing to our 8.1 cluster using f5's 1500 with BigIP 9.02. The cluster is not configured with any failover capability; we are have configured the BigIP with active cookie insertion persistence; all is well untill we take down one of the nodes in the cluster; any session associated with that node via the load balancer is bounced repeatedly between the two remaining nodes; the only solution appears to be to close all browser instances and open a new one. Has anyone experienced this behavior and have some suggestions ?

JMS Topic Load Balancing on Cluster

Folks
How do we load balance JMS Topic on a cluster.
We have a 2 App Server configuration to a single cluster.
If we have Topic A on both OC4J instances 1,2 - and we send a message to 1 - only clients connected to 1 get the message.
What do we need to do to setup JMS clustering so that the messages sent to Topic A can be handled by both OC4J instances.

Hi Ravi,
Check this forum:
/thread/24959 [original link is broken]
Load Balancing for J2EE Web Applications
http://help.sap.com/saphelp_nw04/helpdata/en/ce/4522d557b26942b202e05ff9ee1f3a/frameset.htm
SAP Web Dispatcher - Load balancing EP6.0 SP2
/thread/19304 [original link is broken]
Reward points if this helps
Regards
Pragathi.

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

How to configure Load Balancer in front of Web Logic Cluster

hi all,
I installed 2 weblogic servers in cluster and now i want to deploy Hardware Load balancer in front of them, i want to know do i require any configuration on servers or i just deploy hardware Load balancer in front clustered servers with round robin technique.
Regards,
imran

I think there are two important configuration when you use hardware load balancer in front of WebLogic cluster.
1) Passive Cookie Persistance
You need to configure hardware load balancer so that it can identify Weblogic session cookie for routing request primary server holding HTTP sesstion.
2) External DNS
If there is firewall between hardware load balancer and weblogic cluster and NAT (Network translation ) is used, then you need to configure "External DNS" for each weblogic server in cluster. You need to specify the hostname used by load balancer in "external DNS".
More details about this are available at.
http://edocs.bea.com/wls/docs92/cluster/load_balancing.html#wp1026940
http://e-docs.bea.com/wls/docs92/cluster/planning.html#wp1088950
Hope this will help...
Jayesh
Yagna Sys

OSB Load Balancing

Is there any way to load balance a proxy service in OSB?
For my project, I have an http/wsdl based proxy service that is transforming a pretty large message and routing it to a business service based on a jca adapter. If I monitor my cluster(2 nodes and an admin server) during a load test through soap ui, I only see one of the nodes doing work. The other looks untouched. The url I am hitting is the load balancing url setup on the http tab of the cluster in the weblogic console.
In this doc it says that proxy services are pinned to a single managed server for polling service, but nothing about http:
http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/deploy/cluster.html
Is it possible to have the proxy service load balanced across multiple nodes, or is there some other method of doing this?
Thanks for any help.

Please refer OSB Deployment Guide -
3.3.1 Load Balancing HTTP Functions in a Cluster
Web services (SOAP or XML over HTTP) can use HTTP load balancing. External load balancing can be accomplished through the WebLogic HttpClusterServlet, a WebServer plug-in, or a hardware router. For an overview of a cluster topology that includes load balancing, see Figure 5-1. Oracle WebLogic Server supports load balancing for HTTP session states and clustered objects. For more information, see "Communications in a Cluster" in Oracle Fusion Middleware Using Clusters for Oracle WebLogic Server.
http://download.oracle.com/docs/cd/E17904_01/doc.1111/e15022/cluster.htm#i1483852
Regards,
Anuj

Accessing individual server in load-balanced cluster not working as expected

We have a cluster set up with multiple managed servers and hardware load
          balancers sitting in front to direct traffic. We have the frontend host
          configured to be the dns name of the single URL for the cluster, which maps
          to the IP address that the load balancers balance. When accessing part of
          our site (a WebLogic portal) at
          http://server1/portalApp/appmanager/portal/desktop
          (where server1 is the name of one of the managed servers)
          the portal performs a redirect to the login page at
          /portalApp/appmanager/portal/desktop?_nfbp=true&_pageLabel=login_page.
          The URL that results in the browser is not what I would expect, which would be
          http://server1/portalApp/...
          Instead, it is
          http://cluster/portalApp/...
          where cluster is the frontend host setting. Is there any way to avoid
          this, so we can perform directed testing on specific managed servers?
          Thanks,
          Andy


Hi Maria, thanks for your help! I wrote a simple test jsp that does a
          redirect if a parameter is set, otherwise it doesn't do anything. When I
          accessed the jsp at server1/app/test.jsp?a=true, something (I assume
          either WebLogic or the load balancer) rewrote the URL after the redirect
          (the redirect was to /app/test.jsp). The URL that appears in the browser
          after the redirect is cluster/app/test.jsp. Do you know if this happens
          because of WebLogic or the load balancer? Our load balancers are Cisco
          11503's I believe.
          Do you think it would make any difference if I leave the frontend host
          for the cluster to be the dns name of the cluster, and then if I set the
          frontend host for each server to be the dns name of that specific server?
          Currently each server does not have any value entered for frontend host.
          Thanks!
          Andy
          Maria Carcedo <[email protected]> wrote in
          news:31424665.1108079763742.JavaMail.root@jserv5:
          > Hi Andy!
          >
          > We had basically the same problem and we fixed it by configuring the
          > F5 load balancer to maintain the session with whichever server it
          > started the connection with. We had to enable cookie persistence, more
          > specifically the Active HTTP Cookie, with Method insert (do not enter
          > any expiration or anything else in any other field other than what is
          > already there when the page loads -> F5 bug).
          >
          > So if the original request from the portal goes to server1, every
          > subsequent request will go to server1 as well. The next session
          > request will go to server2 and every subsequent request within that
          > session will go to server 2, and so on (assuming you have round
          > robin).
          >
          > I hope this helps!
          >
          > Maria

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

Load balancing for BPEL Cluster

Can anybody tell how to configure the load balancer in BPEL Cluster ..? I am not able to get the correct documents for that. I want the request from the client can be redirect to any of the cluster server that will be having the PPEL Process deployed.
Can i use third party load balancer also or can i use oracle http server as load balancer ....how to configure in both the case?

Hi Dominik.
Thanks for responding to my message.
Where could i find more info relating to the WEB dispatcher.
I also posted a message on OSS and SAP did not mention
a WEB Dispatcher. (Startup Framework and the J2ee dispatcher handing the load balancing)
Is the WEB dispatcher a must or are there alternate solutions. I am still confused on this topic ??
On the current EP5 release, the load balancing is handled
via MS Load Balancing.
Thanks and appreciate the help !!
Morgan
Message was edited by: Morgan Moodley

Load balancing without a cluster...!!!!????

Hi boys!
          I have a question for you: my NES proxy server can realize a load
          balancing between 2 weblogic 6.0 servers that are NOT IN A CLUSTER?
          I've done some tests configuring the obj.conf like the 2 weblogic
          servers were in cluster, but I dont' understand if it works correctly.
          May be I ask too much ...
          Thanks
          Patrizia


          I'm assuming your using one browser to test this.
          The first time you access a servlet or a JSP that uses session
          tracking, the WL server will store a cookie in the browser. This
          cookie identifies the IP address and port number of the WLS where
          the request was executed (the Primary), and if it is a clustered
          configuation with session replication enable, also a Secondary
          server.
          The next time you make a request to iPlanet (or Apache), wlproxy
          looks at the cookie and directs you to the same WL server - so
          you won't see any load balancing.
          If you quit out of all your browsers, then start a new browser,
          and access it again, you won't have a WL cookie, and the request
          will get load balanced to one of the WL servers.
          Mike
          Patrizia MB <[email protected]> wrote:
          >Thanks Mike,
          >but I've some problems in verifying what you've asserted.
          >In my obj.conf I've put
          >
          > <Object name="wl" ppath="*/servlet/*">
          >
          > Service fn="wl-proxy" WebLogicCluster="10.0.0.3:7060,10.0.0.8:7060"
          >DebugConfigInfo="ON" Debug="ON"
          >
          > </Object>
          >
          >Note that I have 2 NOT-Clustered WLS instances behind
          >NES: I used
          >the "WebLogicCluster" property in the obj.conf only because
          >this
          >is the only way - as far as I know ! - to specify multiple
          >nodes to the
          >proxy.
          >
          >
          >With your suggestion, accessing the URL
          >"http://<your-nes-server>/?__WebLogicBridgeConfigInfo"
          >I can see this:
          > Query String: '__WebLogicBridgeConfig'
          > This entry is cluster aware.
          > ClusterID (from obj.conf): "10.0.0.3:7060,10.0.0.8:7060"
          > WebLogic Cluster List:
          > 1.Host: '10.0.0.8' Port: 7060 Primary
          > General Server List:
          > 1.Host: '10.0.0.3' Port: 7060
          > 2.Host: '10.0.0.8' Port: 7060
          >
          >
          >
          >
          >
          >In spite of that, there's no load-balancing!
          >I checked the 2 access files on the 2 nodes, and I see
          >that all my
          >requests go to the same server 10.0.0.8.
          >Why?
          >According to which logic 10.0.0.8 has been defined the
          >Primary? (They
          >are both Administration Servers)
          >
          >I hope you'll answer to my questions!
          >
          >TIA
          >
          >Patrizia
          >
          >
          >
          >
          >
          >
          >Mike Reiche wrote:
          >
          >> The wlproxy for NES will round-robin requests to multiple
          >WL
          >> servers if they are clustered or not clustered.
          >>
          >> You can get some additional information by adding the
          >property
          >> DebugConfigInfo=ON to the WL configuration in obj.conf
          >then
          >> hitting the URL...
          >> http://<your-nes-server>/?__WebLogicBridgeConfigInfo
          >>
          >> Check the WL NSAPI doc.
          >>
          >> Mike
          >>
          >> Monteforte Patrizia <[email protected]>
          >wrote:
          >> >Hi boys!
          >> >I have a question for you: my NES proxy server can
          >realize
          >> >a load
          >> >balancing between 2 weblogic 6.0 servers that are
          >NOT
          >> >IN A CLUSTER?
          >> >I've done some tests configuring the obj.conf like
          >the
          >> >2 weblogic
          >> >servers were in cluster, but I dont' understand if
          >it
          >> >works correctly.
          >> >May be I ask too much ...
          >> >
          >> >Thanks
          >> >
          >> >Patrizia
          >> >
          >

Cluster Apex MS's across multiple nodes for load balancing?

Can Cluster Apex MS's across multiple nodes for load balancing? If Yes/No, any supportive doc's will be much appreciated.
Here is what I did ..........
I tried multiple MS's on different nodes for Apex Domain (clustered)
Deployed apex.war, i.war with targets pointing to cluster.
Apex listener techstack is shared filesystem $HOME/apex, where apex-config.xml and bdb are available
Anyone of the MS's whichever started up first is locking up bdb and 500 server shows up when internal workspace is being launched with host specific url, where as it works fine for the host which actually locked up bdb (first MS that was started)
2nd MS shows errors as below in log files ..
Caused By: com.sleepycat.je.EnvironmentLockedException: (JE 4.0.103)$HOME/apex/bdb The environment cannot be locked for single writer access. ENV_LOCKED: The je.lck file could not be locked. Environment is invalid and must be closed.
Its expected behavior until here .....
++++ I tried something to get it working ++++
Whilst both MS's are up and running, delete $HOME/apex/bdb but let apex-config,xml be as it is...now the internal workspace urls for both hosts work fine. I logged into host specific urls and navigated, created/edited users.,etc and it is all looking good but it did not create new bdb directory under $HOME/apex ...!!
Having said its working fine, the same issue repeats after the MS's bounce. So I did put a command line to delete bdb dir once the MS comes up to avoid the issue but really not sure if this is the right way at all?
Geek's ...awaiting your advice!!

Hey there,
I managed to fulfill my requirement..
If its a cluster on same machine or across machines, this should work
1. Login to machine, cd $DOMAIN_HOME
2. mkdir -p Apex_lsn_config/AdminServer Apex_lsn_config/<MS1> Apex_lsn_config/<MS2> # MS1 and MS2 are the Managed Server names as appropriate
#If you are planning for cluster spawning MS's across machines, make sure you create the dir's on step 2 for each machine respectively. (in my case $DOMAIN_HOME is not shared)
3. Copy apex-config.xml from the /tmp/apex or whatever location you have it currently to Apex_lsn_config/<MS1> Apex_lsn_config/<MS2>
4. cd $DOMAIN_HOME/bin; cp -p SetDomainEnv.sh SetDomainEnv.sh.orig #Backup the file
5. Append -Djava.io.tmpdir in SetDomainEnv.sh as below for JAVA_OPTIONS # Do it on both machine if you are not sharing DOMAIN_HOME and planning cluster across machines
-Djava.io.tmpdir=$DOMAIN_HOME/APEX_CONFIG/${SERVER_NAME}
Hint: Search for "iterativeDev" and append the same line with -Djava.jo.tmpdir
6. Modify "java.io.tmpdir" from the web.xml file of apex.war as below and re-deploy the war
<context-param>
<param-name>config.dir</param-name>
<param-value>${java.io.tmpdir}</param-value>
</context-param>
7. Bounce Weblogic Admin and Manged Servers. Make sure to tail the Managed Server log to see apex-config.xml is picked from the new location.
8. Brew a Coffee for yourself :)
- You find the instructions on creating a cluster from weblogic documentation, the steps mentioned above are only to overcome the bdb locking issue whilst creating a cluster.
Did it help?
Edited by: Oratime on Mar 25, 2013 2:44 AM

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]

Cluster / Load balancing and no. of user

Hi
Just wondering what kind of cluster / load balancing setup is need for e.g. 50 concurrent users ? and what's the deciding factor that will justify additional presentation service / BI server to be added to an existing cluster farm ?
Or maybe if you guys could share what's the cluster setup that you have and the number of users that would greatly help me to get a rough idea of the kind of setup needed. E.g. 2x presentation services and 2x BI server with 100 users, estimated 50 concurrent users, etc..
Thanks in advance !

If there are 50 concurrent users, I don't think that you need to go for clustering. You can use more resources like increasing the RAM size and increasing th CPU count.
If you opt for 64 bit operating system ,it would give you better performance.
Regards
Rajesh J

LOAD BALANCING VM'S in a Cluster

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