Reverse Proxy plug in and Load Balancer Plug in

Hi,
Can anyone please provide me with an example obj.conf file showing how to combine the reverse proxy plug-in and Load Balancer plug-in.
I would like to use the reverse proxy plug in to detect when static content is requested and provide this from the web server. Requests for dynamic content would then be forwarded to an Application server via the Load balancer plug-in. I have found plenty of documentation on how to configure these plug-in separately but nothing on how to combine the two.

smiking
reverse proxy plugin - its job is to forward the requests to another server for a specific task. you can use the webserver 7 . it does forward and limited load balancing (using round robin ) based on the number of servers you provide in the configuration. i would say this is a poor man's setup.
load balancer plugin - some app servers like sun java system app server or web logic provide this plugin so that you can effectively use the back end app server
with both these setup, you can <if> constructs to determine which requests need to be forwarded to the back end server.
I wonder, why do you need both - if both of them is designed to do the same thing.

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ABAP Proxy Set up and Load balancing

Hi All,
We have a SAP ECC 5.0 PRD server in our landscape. I need to set up ABAP Proxy in the server.
They have implemented Load balancing in the ECC 5.0 PRD server. They have two servers (One Central Server and another APP Server) and one of the servers will be used at any point in time based on load conditions.
Now where exactly i have to perform the ABAP Proxy set up and how does it work at runtime.
Thanks in advance.
Regards,
Sudharshan N A

Hey,
    refer to this.
R3 side
SLDCHECK
Use this transaction to access the SLD of XI.
SLDAPICUST
Create an entry for respective XI server
requires hostname, port username and ip.
Can have multiple enteries for different servers.
But you can check only one entry.
based on the entry that is checked, respective SLD API will be triggered from
SLDCHECK.
SM59 (T type connections).
To connect to the SLD you need 2 types of TCP/IP connections.
1)LCRSAPRFC:-
      In this you require the gateway host(ip address) and gatewayservice(sapgw[system no.])
      YOu also need to give Program ID.
      Entry of corresponding Program ID must be maintained in SMGW.
      IN SMGW Click GoTo->logged on Clients.
      If entry is not there for corresponding XI.
      Create a communication channel in XI, pointing to R3 and give a Program ID
      in the channel. Once the channel is activated, corresponding Program ID wil
      appear in SMGW.
2)SAPSLDAPI:-
     In this case follow the same porcedure as for LCRSAPRFC.
   As far as the Program ID is concerned te procedure mentioned above is for
   Customized RFC's
   The RFC destinations mentioned here are both standard RFC's
   Hence for these two RFC's no need to Create Program ID's. you just need to
   change the System ID of the Program ID.
   Both these RFC's are maintained in the J2ee server of XI.
SPROXY.
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   then you need to maintain one G type RFC destination pointing the resepctive XI server.
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   host and set the path prefix as /rep.
   Goto SPROXY->Goto->connection test-> click on the table SPROXSET.
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In order to connect R3 to the Integaration server you need to maintain H type
The default RFC is XI_INTEGRATIONSERVER. In you need to give the Target host entry as the
Ip address and Path Prefic as.../sap/XI/engine/?type=entry (this you can get from SXMB_ADM of XI)
You can also create the H type RFc of your own.
goto SXMB_ADM(r3) and open Integration engine configuration.
regards,
    Milan

Load Balance Plug-in VS Reserve Proxy Plug-in

Hi,
We are trying to setup the connectivity between sun java system web server 7.0 to glass fish 2.1.
Which technology of Load Balance Plug-in VS Reserve Proxy Plug-in is better? What is the advantage one over another? Thanks!

It may be helpful to note the lineage of the SAFs:
The GF LoadBalancer SAF is the eldest
The Web Server Reverse Proxy SAF is the next version and is derived from the GF LoadBalancer
The Reverse Proxy feature of WS7 is the third version and is derived from the Web Server Reverse Proxy SAF
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Reverse Proxy and Load Balancer for SMP 2.3 and Agentry Application

Hi Expert,
I'm putting in place a mobile solution composed by SMP 2.3 SPS 4 and SAP ECC 6.0. In the SMP 2.3 I created the agentry server and I have deployed my agentry application.
My SMP/Agentry infrastructure is composed by two servers therefore I need a load balancer for balance the load into the several servers. Furthermore I need to use a reverse proxy in my DMZ zone.
Based on what indicated in the SAP note "1904213 - SAP Mobile Platform Server Release Information" the Apache Reverse Proxy is not supported for Agentry clients. Agentry uses nginx for Reverse Proxy.
I also found the following document How-to-Guide for Reverse Proxy and Load Balancing in SAP Mobile Platform 3.x that explain how to set-up a reverse proxy and load balancer with nginx and apache.
Both the SAP note and the HOW to document are refereed to SMP 3.0 and not to SMP 2.3.
I would know if the NGINX must be used also for SMP 2.3.
Any suggestion/information is appreciated.
Thanks in advance
g.

Please see Agentry Network Landscapes

Web Dispatcher - Reverse Proxy and Load Balancing

I'm finding limited docs on Web Dispatcher with regard to reverse proxy and load balancing. Are you aware of some recent presentations or docs in this area? The info on help.sap.com is not what I'm looking for.
Thanks.

Hi,
best thing is that you look at your scenarios and test the web dispatcher against each of it, like:
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- Portal only
- Web Dynpro ABAP / Java
- BSP
- Different backend systems like SRM, MDM
- Several backends with 1 Web Dispatcher
After getting a list of use cases that you can test quite easily (installation of Web Dispatcher is done fast and can be done on a local PC), you can contact SAP Support and ask them about the specific problems and questions you encountered. This way, you'll get the official answer, sometimes they will even inform you about "secret" parameters and options.
As of the reverse proxy functionality: there are several version of Web Dispatcher available that differ from the functionality offered. The latest version - 7.2 - is the one that offers the most, i.e. allows you to create rewrite rules like Apache.
SAP Note 908097 - SAP Web Dispatcher: Released releases and applying patches
br,
Tobias

How to use the Load Balancer Plug-in to serve multiple domains

In SJSAS8.1 SE/EE the asadmin commands that create and maintain a load balancer configuration operate within a domain. When the load balancer configuration is exported an xml file is created that contains all the information for that domain. To make the load balancer plug-in balance the load for multiple domains, the loadbalancer.xml files can be manually merged to conatin the data that is exported from each domain's load balancer configuration.
For example, 2 domains are created, both having a load balancing configuration. After exporting both configurations using the asadmin export-http-lb-config command, the user would then cut and past the cluster information into the single loadbalancer.xml file that resides under the web server's config directory.
An example of the manually merged loadbalancer.xml file follows:
<?xml version="1.0" encoding="UTF-8"?>
<loadbalancer>
<cluster name="domain1">
<instance disable-timeout-in-minutes="30" enabled="true" listeners="http://localhost:1026 https://localhost:38181" name="i1"/>
<instance disable-timeout-in-minutes="30" enabled="true" listeners="http://localhost:1027 https://localhost:38182" name="i2"/>
<web-module context-root="ab" disable-timeout-in-minutes="30" enabled="true"/>
<health-checker interval-in-seconds="5" timeout-in-seconds="60" url="/"/>
</cluster>
<cluster name="domain2">
<instance disable-timeout-in-minutes="30" enabled="true" listeners="http://localhost:1029 https://localhost:38189" name="i3"/>
<instance disable-timeout-in-minutes="30" enabled="true" listeners="http://localhost:1030 https://localhost:38188" name="i4"/>
<web-module context-root="webservice" disable-timeout-in-minutes="30" enabled="true"/>
<health-checker interval-in-seconds="5" timeout-in-seconds="60" url="/"/>
</cluster>
<property name="response-timeout-in-seconds" value="60"/>
<property name="reload-poll-interval-in-seconds" value="5"/>
<property name="https-routing" value="false"/>
<property name="require-monitor-data" value="false"/>
<property name="route-cookie-enabled" value="true"/>
</loadbalancer>
Hope this helps - Mark

Mark, be my savior, I work for SUN as subcontractor at client site. the only one at site ...so I depend on this forum for solutions........
still having trouble failingover to second instance. I have two AccessManagers behind this loadbalancer.
Here is what I saw......
**************LOGS**********************
[20/Jun/2005:14:22:47] failure (15102): for host 128.114.65.13 trying to GET /amconsole/base/AMA
dminFrame, service-passthrough reports: timed out waiting for request body
[20/Jun/2005:14:22:47] warning (15102): reports: lb.runtime: ROUT1014: Non-idempotent request /
amconsole/base/AMAdminFrame cannot be retried.
So I went and updated the loadbalancer.xml (see at the end of the msg). Now I get a different kind of problem...
**************LOGS******************************
[20/Jun/2005:15:25:18] failure (15295): for host 128.114.65.13 trying to GET /amconsole/base/AMA
dminFrame, service-passthrough reports: timed out waiting for request body
[20/Jun/2005:15:25:18] info (15295): reports: lb.runtime: RNTM3003 : Error servicing the request : NoVal
Here is my loadbalancer.xml file...
<loadbalancer>
<cluster name="cluster1">
<instance name="instance1" enabled="true" disable-timeout-in-minutes="1" listeners="http://idm-test-1.ucsc.
edu:80 "/>
<instance name="instance2" enabled="true" disable-timeout-in-minutes="1" listeners="http://idm-test-2.ucsc.
edu:80 "/>
<web-module context-root="amconsole" disable-timeout-in-minutes="1" enabled="true" error-url="sun-http-lber
ror.html" >
<idempotent-url-pattern url-pattern="/*" no-of-retries="3" />
</web-module>
<web-module context-root="amserver" disable-timeout-in-minutes="1" enabled="true" error-url="sun-http-lberr
or.html" >
<idempotent-url-pattern url-pattern="/*" no-of-retries="3" />
</web-module>
<web-module context-root="ampassword" disable-timeout-in-minutes="1" enabled="true" error-url="sun-http-lb
error.html" />
<web-module context-root="amcommon" disable-timeout-in-minutes="1" enabled="true" error-url="sun-http-lberr
or.html" >
<idempotent-url-pattern url-pattern="/*" no-of-retries="3" />
</web-module>
<health-checker url="/" interval-in-seconds="15" timeout-in-seconds="2" />
</cluster>
<property name="reload-poll-interval-in-seconds" value="60"/>
<property name="response-timeout-in-seconds" value="30"/>
<property name="https-routing" value="false"/>
<property name="require-monitor-data" value="true"/>
<property name="active-healthcheck-enabled" value="true"/>
<property name="number-healthcheck-retries" value="3"/>
<property name="route-cookie-enabled" value="true" />
</loadbalancer>
**************************************************************

Cache and Load Balancing with Oracle APEX Listener

Hi,
I intend to use only HTTP access.
How to implement a Cache and Load Balancing with the Oracle APEX Listener?
Is it possible to do with the the standalone running APEX Listener?
Thanks by advance for any tips/documentation/references.
Kind Regards.

Hi,
I think this question is best asked in the APEX Listener forum:
ORDS, SODA & JSON in the Database
Kind regards
Sandro

Cache and Load Balancing for the Oracle APEX Listener

Hi,
I intend to use only HTTP access.
My database is Oracle 11gR2, SE, 32 bit.
How to implement a Cache and Load Balancing with the Oracle APEX Listener?
Is it possible to do with the the standalone running APEX Listener?
Thanks by advance for any tips/documentation/references.
Kind Regards.

Error. To be closed.

Cache and Load Balancing for Oracle APEX Listener

Hi,
I intend to use only HTTP access.
The database I use is Oracle11gR2 SE 32bit.
How to implement a Cache and Load Balancing with the Oracle APEX Listener?
Is it possible to do with the the standalone running APEX Listener?
Thanks by advance for any tips/documentation/references.
Kind Regards.

Error. To be closed.

PIX Redundant Internet Line and Load balancing

I would like to find out if it's possible to configure my Cisco PIX 525 to use a secondary internet line from a different provider and perform load balancing. I'm using PIX Version 6.3(1)

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VPN device with dual ISP, fail-over, and load balancing

We currently service a client that has a PIX firewall that connects to multiple, separate outside vendors via IPSEC VPN. The VPN connections are mission critical and if for any reason the VPN device or the internet connection (currently only a T1) goes down, the business goes down too. We're looking for a solution that allows dual-ISP, failover, and load balancing. I see that there are several ASA models as well as the IOS that support this but what I'm confused about is what are the requirements for the other end of the VPN, keeping in mind that the other end will always be an outside vendor and out of our control. Current VPN endpoints for outside vendors are to devices like VPN 3000 Concentrator, Sonicwall, etc. that likely do not support any type of fail-over, trunking, load-balancing. Is this just not possible?

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Redirect line-rate traffic to any devices, for example web cache engines, Web Accelerator Engines (WAE), video-caches, etc.
Capability to create clusters of devices, for example, Firewalls, Intrusion Prevention System (IPS), or Web Application Firewall (WAF), Hadoop cluster
IP-stickiness
Resilient (like resilient ECMP)
VIP based L4 load-balancing
NAT (available for EFT/PoC). Allows non-DSR deployments.
Weighted load-balancing
Load-balances to large number of devices/servers
ACL along with redirection and load balancing simultaneously.
Bi-directional flow-coherency. Traffic from A-->B and B-->A goes to same node.
Order of magnitude OPEX savings : reduction in configuration, and ease of deployment
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The servers/appliances don’t have to be directly connected to N7k
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Supported on both Nexus 7000 and Nexus 7700 series.
Supports both IPv4 and IPv6
N5k / N6k support : coming soon
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What does per Wlan Band select and load balancing do ?

Good morning.....We recently upgraded our controllers from 4.2.185 to 6.0.188 and have noticed many clients having connectivity issues. We have Aggressive load balancing turned off globally but have noticed that band select and load balancing are enabled on the
Wlan. Are these settings mutually exclusive or do they do the same thing ? Does the Wlan setting override the default ? We have noticed that there is
output doing "debug dot11 load-balancing"
Thanx.....Dave

I believe we never had load balancing turned on when running 5.2 code. We jumped from 5.2 to 6.x temporarily and then to 7.0 within a 30 day time frame this summer. We're a large university and we had very few users on WiFi during that time.
The Macintosh laptops are having nothing but trouble since school began, and I have gone over everything and found that band select is turned on as well as load balancing. Since band select didn't exist in 5.2 (I believe) I know it wasn't on. As for load balancing, I don't believe it was on, and I discovered it was turned on when recently reviewing our configs.
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I turned off load balancing and will see how it goes....
Thanks!

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Hi All,
I am trying to create aRFC model. In SAP logon screen, I can see two tab pages - Single Server and Load Balancing.
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Thanks
TG

Single Server Connect or Load Balancing connect is completely independend from the location where SAP Gui Client is installed.
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What SSL accelerator and load-balancer does anyone recommend?

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Ana_Alm wrote:
Hi there!
I just downloaded and installed OS X Lion, and I'm loving it so far.
However, I've seen that Mountain Lion will have some new features when it comes to social apps (what I call the ones that combine twitter, facebook, rss readers and so on).
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Thanks a lot in advance!
As Mountain Lion has not been released to the public yet, then most of us have no idea which companies have updated the development of their Apps for ML. It is in Development phase so any App you try is at your own risk.
Good Luck
Pete

Reverse Proxy plug in and Load Balancer Plug in

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