Web dispatcher and J2EE load balancing

I have portal DBCI on one server and DI on multiple servers. I implemented Web dispatcher in front of the DI and it does the load balancing across all DI and CI. What I want to do though is not to route any users to CI instance - ie take CI server processes out of load balancing.
In ABAP environment you could create a logon group and not put CI in the group and users coming through the logon group do not go to the CI. I would like to do the same with Portal Java processes. In help.sap.com I found that web dispatcher uses default !J2EE group if there are no groups defined - to distribute users but I can not find anyway to define a logon group for J2EE java.
Does anybody out there know how to do this - define a logon group and include only DI and not CI in that?

> Raj,
>
> Which versions are you on J2EE? EP?
> If you are on EP SP14 or NW01 you can do workload
> distribution within the portal.
>
> James
We are using NW 04 based EP 6 SP 16. I am looking for to use web dispatcher to distribute users on the DI servers and not distribute any users on the CI server. What can I do so that if admin user enter http://CI_server:50000/irj then they can login to the CI server if users come through webdispatcher then they are not put on the CI but go to one of the DI servers only. By default web dispatcher would send some users to CI and I don't want that.

Similar Messages

WebAS access via Portal: Web Dispatcher required for load balancing ABAP

Hi Folks -
We have EP 6.0 SP18 (Java only, WebAS 6.40, Unix/Solaris). The portal has a CI/SCS and one DI so we have a Web Dispatcher to load balance the portal servers. This works fine (and provides port 80 access).
This portal will provide access to HTTP services from an ABAP WebAS (6.20 with 6.40 kernel, Unix/Solaris). A landscape configuration entry has been added to the portal for this ABAP system. The ABAP system has a CI and multiple app servers, all capable of handling HTTP requests. This will also require port 80 access.
1. Will we need an additional Web Dispatcher to load balance HTTP requests to the 'backend' ABAP WebAS system, or will the portal be smart enough to handle the load balancing itself (perhaps based on the information in the landscape configuration)?
2. If the portal itself handles the HTTP load balancing can you point me to documentation (so I can make sure I have proper configuration)?
3. Are there any changes to this with NW2004s Portal (we plan to upgrade soon)?
Thanks in advance! Jeff

Jeff,
Regarding:
Q1. If you create a system object from the "SAP system with load balancing" template in portal and configure the object to point to your CI (msg server), the LB should be handled.
Q2. Portal load balancing is handled by the message server. If you point a test URL to the port of your message server, you will notice that you are issued a redirect the URL of your dialog instance. The web dispatcher is just a proxy (with some intelligence). When a request is made to the WD, it makes a connection to the MSG server, the list of active instances is queried, a redirect is made to that instanct. If you use WD, that connection can be proxied behind a standard URL. If you connect directly to the MSG Server instead, you will notice your URL change, just as it does on the service marketplace.
WDs are good for providing services, masked (proxied) behind virtual names. If you do not want the customer to see a physical URL of the server, use the WD. There are lots of other solutions that can do this too though such as Apache, ISA, Juniper devices, Cisco LDs. WDs have a very low performance threshold though, especially if you use SSL. WD is a performance bottleneck and should be benchmarked to see if it is right for your application.
Q3. No changes this architecture in 04s.
jwise

Session Binding on Web Cache acting as load balancer

Hi gurus,
I have Web Cache 10.1.2 acting as load balancer on the front-end machine, and two OracleAS 10.1.2 enterprise edition installations behind it. The load balancing configuration is done and is working well. The Web Cache (acting as load balancer) routes requests the to the two OracleAS installations very well.
Now I need to set up session binding, so that a request from the same client is directed to the same OracleAS installation (in the same session). I am really a novice on session binding - could you pl let me know what I need to do?
Going through the Web cache admin guide, I did try to use JSESSIONID but without much success. Specific Qs:
1. Do I need to enable session binding at only the back-end OracleAS installations, or also at the front-end Web Cache (acting as load balancer).
2. If I use JSESSIONID - is it generated by Web Cache / HTTP Server automatically, or do I need to write a J2EE application to generate it?
Thanks a lot in advance.
Navneet.

hi,,,
i neesd some help in ur issue,
i face a problem woth web cache in Load balancing ,, it is not working...
my case is same to ur case, BUT i have AS10g ( 9.0.4 )
and i got this err
"FRM-92101: There was a failure in the forms server during startup.
This could happen due to invalid configuration.
Please look in the web-server log file for details."
i followed metalink notes and configration. and Configuring Oracle HTTP Server by modifying the httpd.conf file.
- CookieTracking On
- and CookieName xxxxxxx
and still the same prob ...
could u help me plz.
and is it because my AS version which is 10g(9.0.4) ?
this is my emil : [email protected]

ASA and vpn load balancing

Hi,
I am configuring 2 ASA5540 for internet trafic inside to outside ,
outside to inside (web,smtp) but also vpn load balancing for client to site , site to site and webvpn.
In the doc I can configure them for internet trafic as Active/Standby or Active/active.
for vpn : I can use vpn load balancing
But no information if I want to use the active/passif and vpn load balancing together.
Any thoughts on which way to go? what is the best thing to do ?
Regards

Hi,
I think that you cannot use an Active/Active configuration for VPN connections as it is stated on Cisco's documentation: "Note: VPN failover is not supported on units that run in multiple context mode as VPN is not supported in multiple context. VPN failover is available only for Active/Standby Failover configurations in single context configurations" available at http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a0080834058.shtml
Hope it helps

H-REAP and Client Load-Balancing

I'm told by Cisco that H-REAP does not support client load-balancing.
We have a situation where we want to deploy LWAPPs using H-REAP into a conference room where training would take place.
Any suggestions on how to overcome the inevitable slowness these people are going to experience from being unevenly associated with the APs?
We can't re-write the application so we are looking for a wireless solution.
Anyone hear about how other organizations have dealt with this type of situation?
I'll be glad to supply more details if I am not being clear in my description of the problem.
Thanks in advance. All responses will be rated.
Paul

This is the functionality which is missing in H-REAP: Client and Network Load Balancing
"Radio Resource Management (RRM) load-balances new clients across grouped lightweight access points reporting to each controller. This function is particularly important when many clients converge in one spot (such as a conference room or auditorium) because RRM can automatically force some subscribers to associate with nearby access points, allowing higher throughput for all clients. The controller provides a centralized view of client loads on all access points. This information can be used to influence where new clients attach to the network or to direct existing clients to new access points to improve wireless LAN performance. The result is an even distribution of capacity across an entire wireless network.
Note: Client load balancing works only for a single controller. It is not operate in a multi-controller environment."
I suppose if we limit the number of users that can associate with a particular AP then we will achieve some client load-balancing. Though a hard limit on the number of end-users will also lead to situations where some end users will not be allowed any access.

Web Dispatcher and SNC WAS

If I connect my Web Dispatcher to a WAS that is not running SNC it connects okay but if I point it to a WAS that is running SNC I get SNC related arrors in the file dev_webdisp.log:
[Thr 6968] *** ERROR => invalid service descriptor token 'p:GB\SAPServiceQAS' [ictxxroute_r 2681]
[Thr 6968] *** ERROR => syntax error in text description near line 4 [ictxxroute_r 3135]
[Thr 6968] *** ERROR => IcrUpdateServerPoolFromDescrString() failed 6 [icrxx.c      1762]
If I call the /sap/public/ping service on the WAS directly from Internet Explorer on my PC it connects okay, but if I call the same service from my PC via the Web Dispatcher it failes with the above message in the log file and the below HTTP message:
500 Dispatching Error
Dispatching Error
Error: -26
Version: 6040
Component: HTTP_ROUTE
Date/Time: Tue Feb 07 12:47:50 2006
Module: http_route.c
Line: 2352
Server: UKLONSAP011_QE7_10
Detail: no valid destination server available for '!ALL' rc=13
I cannot find any information relating to the Web Dispatcher and SNC on help.sap.com or OSS.
Do I have to install the SNC library onto the Web Dispatcher server? If so, how do I then reference it?
Any ideas?
Thanks.
Paul

Hi Paul,
SNC library is not required for Web Dispatcher.
The problem seems to be the data the message server provides with the URL http://<msg_host>:<msg_http_port>/msgserver/text/logon?version=1.2
If SNC is activated you will have an entry for RFCS in the data like:
RFCS     bin.wdf.sap.corp     4853     p/secude:CN=BIN, O=SAP-AG, C=DE
The error " invalid service descriptor token 'p:GB\SAPServiceQAS' " indicates that the parser could not parse the response from the message server. Then the server list is empty and you get the "dispatching error".
Maybe the backslash lets the parser struggle. Please check that you have an up to date version running (6.40 kernel patch level > 90). If that is the case, then this problem should be handled by OSS message.
Kind regards,
   Oliver

Diff. between Web Dispatcher and ICM

hi gurus,
Please help to understand the Difference between Web Dispatcher and ICM in whereas ways like
When do we use which tool?
The architec differences between them?
Anything more that would help me to understand better!
Thanks a lot in advance
Regards
Sekhar

Hi
At top level, Web dispatcher is like simple dispatcher which handles all the internet related requests like Http, Https, Smtp.
ICM is Internet connection Manager which is used to administer the flow between SAP and outside world using HTTP, HTTPs, SMTP
Please read these
Web Dispatcher
http://help.sap.com/saphelp_47x200/helpdata/en/42/5cfd3b0e59774ee10000000a114084/content.htm
ICM
http://help.sap.com/saphelp_nw04/helpdata/en/0a/a7903febb15a7be10000000a11405a/content.htm

CSS and Oracle Load Balancing

Hi,
I have CSS in single arm deployment model. I have multiple servers load balancing on this CSS on port 80 etc. Today I am trying to load balance one Oracle server but I am facing problem with it.
Real servers are accessible on port 80 without any problem but when we are trying to access the same servers on VIP we are not able to see the web page.
real server http://192.168.17.12/irs.htm
real server http://192.168.17.14/irs.htm
real server http://192.168.10.37/irs.htm
VIP
http://192.168.200.58/irs.htm
Below is the configuration. I can do the telnet on port 80 and I can ping the VIP IP address.
I will only put 192.168.200.58 in browser I can see the oracle page but with the full URL i am not able to see it.
Though I have other oracle servers which I have load balance with the same configuration and I can access the web page.
==========================================================================================
http://tptest.enoc.com/forms/frmservlet?config=tp (This is working fine).
========================================================================
http://irs.enoc.com/irs.htm (This is not working).
By name and by IP address both are not working.
http://192.168.200.58/irs.htm (This is not working).
=============================================================================
service IRC_1
ip address 192.168.17.12
keepalive type tcp
keepalive port 80
active
service IRC_2
ip address 192.168.17.14
keepalive type tcp
keepalive port 80
service IRC_DR
ip address 192.168.10.37
keepalive type tcp
keepalive port 80
content ENOC_IRC
    add service IRC_1
    add service IRC_2
    add service IRC_DR
    vip address 192.168.200.58
    protocol tcp
    port 80
    advanced-balance sticky-srcip
    active
owner ENOC_GIT
content ENOC_IRC
    add service IRC_1
    add service IRC_2
    add service IRC_DR
    vip address 192.168.200.58
    protocol tcp
    port 80
    advanced-balance sticky-srcip
    active
group ENOC_IRC
add destination service IRC_1
add destination service IRC_2
add destination service IRC_DR
vip address 192.168.200.58
active
===================================================================================================
ENOCDC-CSS01(config)# show service summary
Service Name                     State     Conn Weight Avg   State
                                                         Load Transitions
IRC_1                            Alive         0      1     2            0
IRC_2                            Suspended     0      1   255            1
IRC_DR                           Suspended     0      1   255            1
ENOCDC-CSS01(config)# show summary
Global Bypass Counters:
   No Rule Bypass Count:     0
   Acl Bypass Count:         0
Owner            Content Rules    State     Services         Service Hits
ENOC_GIT
              ENOC_IRC         Active    IRC_1            103
                                            IRC_2            10
                                            IRC_DR           7
=======================================================================================================
Same setting I am doing for other servers and working fine only for these servers I am facing problem. Curently only one server is active in the configuration.
Kindly let me know what I am missing and how to fix the problem.
I have also attached the full configuration of CSS.

Hi,
My point of concern is that I did the same for Oracle server and this is working fine
http://192.168.200.95/forms/frmservlet?config=tp
only when I am doing the load balancing for
http://irs.enoc.com/irs.htm (This is not working).
By name and by IP address both are not working.
http://192.168.200.58/irs.htm (This is not working).
I dont have a option for TAC case is there a a way to fix the problem by apply other load balancing method. Is there something to do with the Circut VLAN. I didnt create the Circut VLAN 17 where this server is located.
I am doing almost 8 differenceservers load balancing in this CSS.
your expert opinion will definately help me.

New ASA5512- 5515: content filter and WAN load balancing

Hi,
it's possible to make the content filter with the new models of asa?
One of our customers would like to have content filter with the possibiliy to monitor the single client activity (log).
It' s possible also make the load balancing between 2 WAN?
Now in HQ they have 2 WAN with WAN backup (ASA5505) and VPN to another site.
Thanks in advance,
Paolo.

I saw that you can add CX feature:
CX - Context Aware Security Feature:
Cisco ASA CX Context-Aware Security is a modular security service that extends the ASA platform with next-generation capabilities. It is available with SSD purchase for model such as 5512-X, 5515-X, 5525-X, 55545-X and 5555-X.
Application Visibility Control (AVC):
This is additional feature in CX. Activation of this feature require seperate license. This is the feature that do deep packet inspection for Application recognition. provide context-aware firewall security.
Web Security Essentials (WSE):
This is additional feature in CX. Activation of this feature require seperate license. It deliver features like "URL Filtering" and "Global Threat Intelligence".
Can somebody confirm that?
Have somebody already used and configured this features?
Thank you,
Paolo.

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.

Some confusion about Web Cache clustering for load balancing

I have 4 Windows 2003 identical machines having OAS 10g installed with Web Cache (Same Passwords and Oracle Home) . I want to utilize them for load-balancing using Microsoft Network Load-balancing. I followed the Note: 259208.1 till step#10. Now we have virtual machine "IASPROD" for all other nodes {IASPROD1,IASPROD2,IASPROD3,IASPROD4 } I am able to logon to Web Cache manager from all nodes separately.
On Node-1 I added all nodes entries in " Origin Server " having routed "Enabled " for all of them. Same I did added in Site-Definitions and gave alias hostname as "IASPROD" which is virtual server.
Priority =1
Site Hostname =iasprod1.domain Port = 80
Policy = Unrestricted
Origin Server Hostnames , port,proxy
iasprod1.domain 7778 No
iasprod2.domain 7778 No
iasprod3.domain 7778 No
iasprod4.domain 7778 No
I have couple of questions might be very basic but as I am configuring very first time.
1. How do I access all the machines through virtual name as stated above ? I tried but not working.
2. This cluster setup should be repeated for all Nodes or for only node-1.
3. If for only Node-1 than what will heppen in case of Node-1 goes down.
4. How can I verify Load-balancing is working ?
If you guyz can guide me than I'll be very greatful.

One more addition Database is on AIX (9.2.0.4)

NW04 Portal and Cisco Load balancer

Hi everybody,
does anyone have a similar landscape as I have?
Reverse Proxy - Cisco Content Switch Module for Load Balancing - two NW04 Portal Servers.
How did you configure the stickyness / Load balancing mechanism on the load balancer in order to get it running?
Cheers
Jochen

Hi,
Web AS Java issues a cookie called saplb.
You can check its value by connecting to the portal and then launching the command
"javascript:alert(document.cookie)"
within the browser. You will get a cookie value like
saplb_*=(J2EE6202500)6202551
The value in brackets determines the Instance; the second number equals the actual ClusterID (can also be found in the VisualAdmin. Usually 50 indicates the 1st server node, 51 the second one etc.
The saplb_*-cookie can be checked by the cisco see Cisco-Link above. Just configure the Cisco to be sticky on the instance number (value in the first brackets, in the example 6202500).
Several Customers do it like this, and actually the SAP Webdispatcher is also using this cookie to determine the instance to distribute the request to.
Good luck Bernhard

CSS on multiple subnets and separate load balancing

Hello,
I've a situation where I need to load balance incoming clients on subnet A to 3 real servers on subnet B - no problems there.
But I also need to load balance different clients on subnet C to 3 other servers on subnet D and clients on subnet E to 2 servers on subnet F.
Basically I want to use the CSS for 3 different load balancing operations.
Rather than using 3 separate CSS11503s can I do all this with multiple VLANs on the LAN switches and 1 CSS?
Any help appreciated
Regards Tony

you can have as many vlan as you want.
So yes you can do what you want.
Just be aware that the CSS can route as well between those vlans, so if you separation between them you may have to use ACL.
Gilles.

SAP Web dispatcher and WebAS 6.20 ?

Hi all,
I'm trying to configure a standalone SAP Web dispatcher (SWD) to access our WebAS (WAS), but I don't understand how to setup the configurations files.
Currently I can reach the SWD admin via: http://swdhost:81/sap/wdisp/admin/default.html
The WebAS (ABAP) service I want to access is at:
http://washost/ris
The SWD pfl file looks like this:
# Profile generated by sapwebdisp bootstrap
# unique instance number
SAPSYSTEM = 1
# Accesssability of Message Servers
rdisp/mshost = swdhost
ms/http_port = 80
# SAP Web Dispatcher Parameter
wdisp/auto_refresh = 120
wdisp/max_servers = 100
wdisp/url_map_location = file://urlprefix.txt
# SAP Web Dispatcher Ports
icm/server_port_0 = PROT=HTTP,PORT=81
# SAP Web Dispatcher Web Administration
icm/HTTP/admin_0 = PREFIX=/sap/wdisp/admin,DOCROOT=./admin
Urlprefix.txt looks like this:
version 1.0
PREFIX=%2fRIS%2f&CASE=&VHOST=%2a%3a%2a%3b
Now after reading most of the post in the forum and the docs, I still cant understand how I can "say" to SWD to map http://swdhost:81/ris to http://washost/ris .
Thanks in advance for your help.
Best Regards
Erik

Hi Alexander,
Thanks, the ms/http_port parameter was not set in my WAShost, now the SWD can see the WAS
now if I try to reach :
http://WAShost:81/sap/public/ping , I get a reply from my WAShost.
but I can't reach http://SWDhost:81/ris or http://SWDhost:81/sap/bc/was/sap/zris
http://WAShost/ris is an alias of http://WAShost/sap/bc/was/sap/zris.
Anyway thanks already.
Cheers
Erik

Lync 2010 and ACE load balancing

Hi there,
Has anyone deployed [or will be deploying] Lync 2010 utilising the ACE as a hardware load balancer. The ACE is not {yet] on the Microsoft list of supported devices for this product, but I am told this because of lack of documentation from Cisco.
The consensus from a few colleagues is that it should work as it did for OCS, which we have already deployed, so assuming that the set up and operation is similar, there shouldn't be much difference in the configurations.
regards,
Glenne.

Hey Glenne,
It seems you got that working already but I wanted to share this simple sample:
parameter-map type http PARAMETER
set header-maxparse-length 65535
set content-maxparse-length 65535
============================================
interface vlan 112
ip address 10.198.16.71 255.255.255.192
alias 10.198.16.124 255.255.255.192
peer ip address 10.198.16.72 255.255.255.192
mac-sticky enable
access-group input anyone
nat-pool 25 10.198.16.125 10.198.16.125 netmask 255.255.255.0 pat
service-policy input ANS-MGT
service-policy input VIPS
no shutdown
============================================
policy-map multi-match VIPS
class LYNC_VIP
    loadbalance policy LYNC_POLICY
    ssl-proxy server SSL_LYNC_TERMINATION
    loadbalance vip icmp-reply active
    nat dynamic 25 vlan 112
    appl-parameter http advanced-options PARAMETER
============================================
class-map match-all LYNC_VIP
2 match virtual-address 10.198.16.125 tcp eq https
============================================
ssl-proxy service SSL_LYNC_TERMINATION
key tac-key
cert tac-cert
chaingroup tac-chaingroup
============================================
policy-map type loadbalance first-match LYNC_POLICY
class class-default
    sticky-serverfarm LYNC_COOKIE
============================================
sticky http-cookie ACE_COOKIE LYNC_COOKIE
timeout 30
replicate sticky
serverfarm LYNC_FARM
============================================
serverfarm host LYNC_FARM
rserver LYNC_SERVER1 80
    inservice
rserver LYNC_SERVER2 80
    inservice
============================================
rserver host LYNC_SERVER1
ip address 10.198.16.93
inservice
rserver host LYNC_SERVER2
ip address 10.198.16.113
inservice
===========================================
Jorge

Web dispatcher and J2EE load balancing

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